ANNUAL REPORT

Transcription

1 ANNUAL REPORT North Carolina State University Student Chapter of the Earthquake Engineering Research Institute Report Date: May 6, 2016 This report summarizes the membership and activities conducted by the North Carolina State University Student Chapter of the Earthquake Engineering Research Institute during the academic year. MISSION & GOALS The objective of EERI-NCSU student chapter is to promote the study and practice of earthquake engineering in the university and the community, to strive to solve national earthquake engineering problems in order to protect people and property from the effects of earthquakes, to further the professional development of the students, and to improve inter-disciplinary communication. MEMBERSHIP The North Carolina State University Student Chapter had a total of 14 members in OFFICERS The Board consisted of the following members: Role Name EERI Member number Student Status President Diego Aguirre daaguirr@ncsu.edu Graduate student Vice-President Emrah Tasdemir etasdem@ncsu.edu Graduate student Treasurer Christopher Price cwprice@ncsu.edu Graduate student Secretary Ana Gabriela Haro agharo@ncsu.edu Graduate student Secretary David Overby dtoverby@ncsu.edu Graduate student Webmaster Nicolas Chomette nchomet@ncsu.edu Undergraduate student Below is a photograph of the officers with some faculty and a guest speaker: * From left to right: Ana Haro, Anahid Behrouzi (guest speaker), Zachary Krish, Dr. Mervyn Kowalsky, Diego Aguirre, Dr. James Nau, Chirstopher Price, Emrah Tasdemir, Dr. Rudolf Seracino Annual Report, May 6, 2016 North Carolina State University Student Chapter of the Earthquake Engineering Research Institute page 1

2 FACULTY & INDUSTRYADVISORS Advisor Type Name Affiliation Faculty Dr. Mervyn Kowalsky Professor at NCSU Industry Dr. Satraijt Das Practitioner with WSP MEMBERS A complete list of members is shown below. Name EERI Member Number Student Status Diego Aguirre daaguirr@ncsu.edu Graduate student Emrah Tasdemir etasdem@ncsu.edu Graduate student Christopher Price cwprice@ncsu.edu Graduate student Ana Gabriela Haro agharo@ncsu.edu Graduate student David Overby dtoverby@ncsu.edu Graduate student Nicolas Chomette nchomet@ncsu.edu Undergraduate student Cuiyan Kong ckong2@ncsu.edu Graduate student Zachary Krish zfkrish@ncsu.edu Graduate student Aaron Stroud alstroud@ncsu.edu Undergraduate student Grayson Fulp gcfulp@ncsu.edu Undergraduate student Leo Barckley lbbarcle@ncsu.edu Undergraduate student Giju Lee glee5@ncsu.edu Undergraduate student Sean Casady srcasady@ncsu.edu Undergraduate student Ariadne Palma Parra alpalmap@ncsu.edu Undergraduate student Arjun Jayaprakash ajayapr@ncsu.edu Graduate student BUDGET & FINANCIALS Sponsor Name/Organization Description Contact Person Amount NCSU Department of Civil, Construction, and Environmental Engineering Financial support for 2 graduate students to attend the 2016 EERI Annual Meeting Renee Howard $ 2,500 NCSU Department of Civil, Construction, and Environmental Engineering Financial support for 6 undergraduate students to participate of the 2016 Seismic Design Competition Lindsay Smith $ 8, Annual Report, May 6, 2016 North Carolina State University Student Chapter of the Earthquake Engineering Research Institute page 2

3 CHAPTER ACTIVITIES REGULAR CHAPTER MEETINGS Seminar: Retaining Wall Design Overview (September 23, 2015) Former NC State student Nicole Brown, currently at AECOM in Raleigh, NC, presented an overview on retaining wall design. During her presentation different wall types were discussed, such as: gravity walls, concrete cantilever walls, soil nail walls, soldier pile walls, segmental block walls, and retaining walls on pile footings. Loading conditions and geotechnical aspects were also considered during this seminar. Seminar: Seismic Design of Masonry Walls for Out-of-Plane Loading (February 9, 2016) Dr. Mike Griffith, a professor from the school of Civil Engineering and Mining Engineering at the University of Adelaide, Australia, discussed the seismic load path that generates seismic forces in unreinforced masonry buildings (URM). In addition, he explained in detail a mechanics-based method to calculate the flexural capacity of URM walls subjected to out-of-plane loads. Seminar: Seismic Performance of Non-Planar RC Structural Walls (March 30, 2016) Former NC State student Anahid Behrouzi, currently a doctoral candidate at the university of Illinois at Urbana-Champaign, presented her doctoral work which focused on the performance of reinforced concrete structural walls. She presented results of large-scale experiments that simulated realistic design and load conditions. The motivation of this work comes from observation of the performance of RC structural walls observed during the 2010 Chile Earthquake and the New Zealand Earthquake. Seminar: Earthquake Hazards above the Cascadia Subduction Zone west of Seattle: Insights from the Sedimentary Record of Large Lakes on the Olympic Peninsula, Washington State (April 20, 2016) Dr. Karl Wegmann, an associate professor at the Department of Marine, Earth, and Atmospheric Sciences at North Carolina State University, presented insights from the sedimentary records from Lakes Quinault and Crescent, located along the flanks of the Olympic Mountains, west of Seattle. Preliminary results using paleoseismic evidence and sediment coring results showed evidence of both great subduction megathrust and large shallow crustal ruptures earthquakes EERI DISTINGUISHED LECTURE (December 4, 2015) As part of the EERI Distinguished Lecture program, the EERI NC State student chapter was selected to host Dr. Robert Olshansky who is a professor and head of the Department of Urban and Regional Planning at the University of Illinois at Urbana-Champaign. His teaching and research cover land use and environmental planning, with an emphasis on planning for natural hazards. He has published on post-disaster recovery planning, planning and policy for earthquake risks, and policy for unstable ground. He is especially interested in understanding how human settlements can better survive in the face of periodic natural disturbances, such as earthquakes, hurricanes, and sea level rise. * From left to right: Dr. Mervyn Kowalsky, Zachary Krish, Ana Haro, Christopher Price, Dr. Robert Olshansky, Emrah Tasdemir, David Overby, Diego Aguirre Annual Report, May 6, 2016 North Carolina State University Student Chapter of the Earthquake Engineering Research Institute page 3

4 EERI-NCSU officers gave Dr. Olshansky a tour to the Constructed Facilities Laboratory (CFL). The objective of this tour was to show the structural laboratory at NC State University as well as to show the different ongoing research projects. After the tour to the CFL, EERI officers took Dr. Olshansky to the different facilities in Centennial campus at NC State University. Subsequently, officers had lunch with him after which Dr. Olshansky gave a presentation titled Cities, Earthquakes, and Time. There was a significant attendance to his presentation, about 60 people, which included people from the Department of Social Sciences at NC State University and the University of North Carolina at Chapel Hill. SEISMIC DESIGN COMPETITION TEAM For the first time, a group of undergraduate students represented NC State University during the 2016 Undergraduate Seismic Design Competition. The NCSU team was accepted to participate in the competition after submitting a design proposal which ranked in 2 nd place out of a group of 45 institutions. The purpose of having a team represent NC State University was not only to allow undergraduate students learning from a hands-on project and the networking opportunities during the competition, but also to encourage other students to get involved with the activities organized by the NCSU student chapter. Some photographs of the NCSU-SDC team are shown below. SDC Team Members A complete list of members is shown below. Name EERI Member Number Role Grayson Fulp gcfulp@ncsu.edu Undergraduate student Leo Barckley lbbarcle@ncsu.edu Undergraduate student Giju Lee glee5@ncsu.edu Undergraduate student Sean Casady srcasady@ncsu.edu Undergraduate student Ariadne Palma Parra alpalmap@ncsu.edu Undergraduate student Nicolas Chomette nchomet@ncsu.edu Undergraduate student Annual Report, May 6, 2016 North Carolina State University Student Chapter of the Earthquake Engineering Research Institute page 4

5 SDC Team Financial Sponsors A list of financial sponsors for the SDC team. Name Amount Note Simpson Engineers & Associates $ 500 Smith Gardner Inc. $ 250 Stewart $ 500 Shelco Inc. $ 500 Otis Crowder $ 2,000 J.M Robinson Jr. $ 1,000 James and Brenda Wilson $ 1,250 College of Engineering NCSU $ 2,000 Team results and lessons learned The NCSU-SDC Team ranked in 16 th position. The structure had a good performance without collapse. However, during the last earthquake record most of the rods that held the additional weights were loose and so the structure was deemed as collapsed. This issue is definitely something that will require more attention in coming years. On the other hand, the architectural design and the poster are perhaps the areas to pay more attention and maybe work a little more. Below is a photograph of the NCSU-SDC Team during the competition. * From left to right: Grayson Fulp, Leo Barckley (team captain), Ariadne Palma Parra, Giju Lee, Nicolas Chomette, Sean Casady The NCSU student chapter supported the SDC Team in two ways. First, graduates students offered an Introduction to Earthquake Engineering for Undergraduate Students Seminar Series. There were a total of 6 seminars that covered aspects not only of seismic design but also earthquakes, structural dynamics, and strength of materials, among others. These seminars were very useful for the SDC Team members as it was the first time they got some context to earthquake engineering. The SDC team was advised by two graduate students from the student chapter, namely, Diego Aguirre and Emrah Tasdemir held regular meetings with the team and guided them throughout the design and construction processes Annual Report, May 6, 2016 North Carolina State University Student Chapter of the Earthquake Engineering Research Institute page 5

6 The NCSU-SDC Team did enjoyed the experience and did well in some of the aspects like the design proposal and the oral presentation, for example. Moreover, it is important to note that, while the team was advised by two graduate students, the team advisors only provided guidance and feedback during the whole process, namely, the team members completed by themselves every task related to the design and construction of the balsa-wood building. For coming years it is expected to get more undergraduate students involved with the competition and the activities developed by the student Chapter. ELECTION & ELECTION RESULTS An election for officers for the academic year was held in March The table below shows the new officers appointed to the Chapter board who will take office in August Role Name EERI Member Number Student Status President Christopher Price Graduate student Vice-President Zachary Krish Graduate student Treasurer Emrah Tasdemir Graduate student Secretary Ana Gabriela Haro Graduate student Secretary Leo Barckley Graduate student Secretary Diego Aguirre Graduate student Secretary Arjun Jayaprakash Graduate student Webmaster Nicolas Chomette Undergraduate student LIST OF ATTACHMENTS Included at the end of this report are the flyers of the events hosted during the academic year Annual Report, May 6, 2016 North Carolina State University Student Chapter of the Earthquake Engineering Research Institute page 6

7 Nicole Brown is a structural engineer for AECOM in Raleigh, NC. She researched concrete filled steel tubes under earthquake loading and received her M.S. in Civil Engineering in 2013 at N.C. State. Since graduation she has assisted on the design of bridges, culverts and retaining walls in North Carolina, South Carolina, Florida, Texas and Virginia. When: Wed., Sep 23 rd Where: Mann Hall 206 Time: 03:00 PM Retaining walls are important structures for transportation. There are a variety of retaining wall types including: gravity walls, concrete cantilever walls, soil nail walls, soldier pile walls, segmental block walls, and retaining walls on pile footings. The type of retaining wall depends on many factors including location, height, soil type and aesthetics. To design retaining walls you must determine the geotechnical properties, loads that will be affecting the walls, and existing and proposed ground profiles. If the wall is located in a seismic area, earthquakes must also be considered.

8 2015 EERI Distinguished Lecturer Cities, Earthquakes, and Time Friday, December 4, :00PM 3:00PM, Mann Hall 307 Earthquakes occur suddenly, in a brief instant of time. But their effects and the actions we take to reduce their effects stretch over many years. This talk will explore some of the characteristics of the relationship between earthquakes and time. More importantly, the impact of the various time characteristics on policy decisions will be discussed. Four policy conclusions will be drawn from this rumination on time, relating to: mitigation, speed and quality of recovery, planning for resilience, and construction standards. Dr. Olshansky is the 2015 EERI Distinguished Lecturer. His teaching and research cover land use and environmental planning, with an emphasis on planning for natural hazards. He has published on post-disaster recovery planning, planning and policy for earthquake risks, and policy for unstable ground. He is especially interested in understanding how human settlements can better survive in the face of periodic natural disturbances, such as earthquakes, hurricanes, and sea level rise. His current research focuses on recovery following large disasters, including numerous earthquakes over the last 20 years. He is the co-author of Clear as Mud: Planning for the Rebuilding of New Orleans (APA Press, 2010), which critically documents the post-katrina planning process in New Orleans. He spent the academic year as a Visiting Professor at Kyoto University, Disaster Prevention Research Institute, studying post-disaster reconstruction in Japan, and has also studied post-disaster recovery management in Indonesia and India. Professor Olshansky's earlier work included studies of earthquake risk in communities in the Central U.S., land use planning implications of the 1994 Northridge earthquake, guidelines for seismic safety advocates, the role of planning in reducing earthquake risks, policies for landslide hazard reduction, financing landslide mitigation, and local hillside development policies. He also completed a comprehensive study of the local implementation of the California Environmental Quality Act. Professor Olshansky has a BS degree in geology from Caltech, and MCP and PhD degrees in city planning and environmental planning from UC Berkeley. Prior to his academic career, he managed a geotechnical engineering firm in the San Francisco Bay area, and he worked with an environmental research institute in Anchorage, Alaska. A few notes about the EERI Distinguished Lecturer: The annual Distinguished Lecture Award of the Earthquake Engineering Research Institute is awarded to members of the Institute to recognize and encourage communication of outstanding professional contributions of major importance for earthquake hazard mitigation. In addition to giving the lecture at the EERI annual meeting, funding is provided by EERI for the distinguished lecturer to travel around the nation and deliver the lecture. The support of EERI that allowed NC State to be one of the locations for this lecture is greatly appreciated.

9 SEISMIC DESIGN OF MASONRY WALLS FOR OUT-OF-PLANE LOADING Tuesday February 9 th :00PM 4:15PM, Daniels 331 Unreinforced masonry (URM) buildings (typically up to 15 m in height) constitute a large proportion of the building inventory worldwide. Many of these buildings were built before earthquake design requirements were in place. As demonstrated time and again, URM buildings are particularly vulnerable to earthquake induced shaking with out of plane wall failures the most common failure mode. In the presentation, Professor Griffith will briefly discuss the seismic load path that generates the seismic forces in URM buildings and then cover in more detail a mechanics based method to calculate the flexural capacity for URM walls subjected to out of plane loads. Mike Griffith is Professor and Head of the School of Civil and Environmental Engineering at the University of Adelaide in South Australia. He obtained his PhD in Structural Engineering from the University of California at Berkeley (1988) after completing Bachelor and Master degrees in Civil Engineering at Washington State University. Dr. Griffith is a member of the Standards Australia Code Committee for Earthquake Loading and he is also a member of the Institution of Engineers, Australia, state committee member of the SA Structural College and Past President of the Australian Earthquake Engineering Society. His main professional and research interests are in the field of earthquake engineering and structural dynamics with a particular interest in the performance of unreinforced masonry structures in earthquakes. He has co authored over 200 research papers in the field of structural engineering and he sits on the Board of Directors for the International Association of Earthquake Engineering which is based in Tokyo.

10 SEISMIC PERFORMANCE OF NON-PLANAR REINFORCED CONCRETE STRUCTURAL WALLS Wednesday March 30 th :00PM 2:00PM, Monteith Research Center 136 ABSTRACT: The use of reinforced concrete structural walls has been widely embraced as an effective primary lateral load resisting system for mid- to high-rise construction in seismic regions. Historically these structural members have tended to perform well under frequent, moderate earthquakes and can be repaired. However, considerable damage to structural wall buildings in recent earthquakes (Chile 2010 & New Zealand ) suggests that current design code provisions may be inadequate. In an effort to evaluate the response of walls and provide guidance to code-writing bodies, it is necessary to: develop a comprehensive understanding of in-field performance of these wall systems in actual earthquakes, carry out large-scale experiments that simulate realistic design and loading conditions, and develop non-linear models that effectively capture the response observed in-field and experimentally. This presentation will comment on each of these areas, focusing particularly on non-planar walls tested at the University of Illinois as part of the speaker s doctoral work and the current modelling efforts being undertaken to study existing structural wall design provisions and provide guidance to code-writing bodies. ABOUT THE SPEAKER: Anahid Behrouzi is a doctoral candidate at the University of Illinois at Urbana-Champaign focusing on structural engineering. She received her bachelor s degree in civil engineering from North Carolina State University (NCSU) in 2011, and her master's degree in civil engineering from the University of Illinois in Her first large-scale experimental testing experience in earthquake engineering was at the NCSU Constructed Facilities Laboratory during the Summer of Since then, Anahid has been active in structural and seismic engineering research in the Network for Earthquake Engineering Simulation facility at the University of Illinois. As of Fall 2015, Anahid has been engaged as a researcher/instructor at Tufts University. Aside from seismic engineering, she has been engaged in engineering education research and has conducted various studies on the use of hands-on demonstrations and experiments in teaching engineering design courses. After completing her doctoral studies in Fall 2016, Anahid plans to join the architectural engineering faculty of a teaching-focused university.

11 Earthquake Hazards above the Cascadia Subduction Zone west of Seattle: Insights from the Sedimentary Record of Large Lakes on the Olympic Peninsula, Washington State ABSTRARCT: Large earthquakes often trigger landslides in mountainous regions. The largest earthquakes occur on subduction plate boundaries. The importance of these subduction zone megathrust events to terrestrial sediment flux from coastal mountain ranges is not well known, due in part to their infrequent recurrence. In contrast, upper plate earthquakes such as the 1999 Chi-Chi, Taiwan and 2008 Sichuan, China events each resulted in thousands of landslides that will continue to impact fluvial systems for decades. Along the Cascadia margin, abundant paleoseismic evidence exists for the occurrence of both great subduction megathrust events (M > 8.6) as well as large (M 6 7.5) shallow crustal ruptures and deeper intraslab earthquakes beneath the densely populated Puget Landwards. However, very little is known about the upland terrestrial response in Cascadia to earthquakes from either of these source regions. By comparison to other locals with significant topographic relief, such as exists within the Olympic and Cascade Mountains, the total number of earthquake-triggered landslides and volume of hillslope sediment transport may be substantial during and following future earthquakes. Furthermore, the surface process response to seismogenic landsliding may have decadal-scale impacts on sediment supply to fluvial networks and coastal margins, with implications for both fresh and salt-water ecosystems. Over millennial time scales, mass wasting associated with large earthquakes may play an important role in modulating the flux of terrigenous sediments to the marine environment and perhaps to the overall evolution of topography above Cascadia and other subaerial forearc subduction margins. Within this framework, I will present preliminary seismic and sediment coring results from Lakes Quinault and Crescent, located along the flanks of the Olympic Mountains, west of Seattle. Wednesday, April 20, :00PM 4:00PM, Mann Hall 304 About the Speaker: Dr. Wegmann has a BA degree in geology from Whitman College, a MS in earth and planetary sciences from University of New Mexico and a PhD degree in earth and environmental sciences from Leigh University. His research reaches around the world including Mongolia, Greece and the Pacific Northwest on areas of how landscapes respond to tectonic and climate forcing, how important earthquake-triggered landslides are to erosion in mountain ranges and how constant is strain accumulation and release across convergent margins.

12 Introduction to Earthquake Engineering for undergraduate students - Seminar series Earthquakes are a major problem for mankind. Earthquakes could cause death and destruction in a wide variety of ways, from building collapses to conflagrations and landslides. About half of the states and territories in the United States and most of the other populous regions of the world are exposed to seismic hazards. So, how can we calculate the response of a structure to an earthquake? For the seismic design, it requires first knowledge of what an earthquake is, what the geologic causes of an earthquake are, and the earthquake characterization and identifiers. When: Fri., Oct. 16 th Where: Mann Hall 321 Time: 04:00 05:00 PM

13 Introduction to Earthquake Engineering for Undergraduate Students - Seminar Series Understanding the dynamic properties and the behavior of structures under the action of time-varying loads plays an important role in for seismic design and analysis. In this seminar, the role of structural dynamics in seismic design is explained along with basic formulations and hints to aid in the design and analysis of structures subjected to earthquakes. When: Fri., Oct. 23 rd Where: Mann Hall 321 Time: 04:00 05:00PM L k, ξ x g (t) m u(t)

14 Introduction to Earthquake Engineering for Undergraduate Students - Seminar Series Structural systems play a key role in structural design. It is important to design structures with a acquitted resistance to seismic forces to insure a safety. In this seminar, braced frames, moment frames, shear walls and a combination of the three are explained to help get a better understanding for future design and analysis of structures subjected to earthquakes. When: Fri., Oct. 30 th, 2015 Where: Mann Hall 304 Time: 04:00 05:00PM

15 Introduction to Earthquake Engineering for Undergraduate Students - Seminar Series Fundamental to the ability of a structure to deform inelastically without collapse is the nature of the materials from which it is composed. This seminar will address the elastic and inelastic behavior of two commonly used building materials (steel and concrete) and how they are modelled in the seismic design of structures. Presentation assumes a basic understanding of solid mechanics (CE313), but all are welcome to attend. When: Fri., Nov. 6 th, 2015 Where: Mann Hall 321 Time: 04:00 05:00PM

16 Introduction to Earthquake Engineering for Undergraduate Students - Seminar Series When: Fri., Nov. 13 th, 2015 Where: Mann Hall 321 Time: 04:00 05:00PM Designing a structure for an earthquake requires knowledge of seismic hazards, how these hazards affect the structure and the structure's ability to resist these effects as a system. This seminar will demonstrate how the information presented in the previous lectures can be combined to design a structure for dynamic earthquake loads. The presentation assumes general knowledge of structural design and material behavior, but all are welcome to attend.

17 Introduction to Earthquake Engineering for Undergraduate Students - Seminar Series When: Fri., Nov. 20 th, 2015 Where: Mann Hall 321 Time: 04:00 05:00PM In this seminar, linear Time History Analysis (THA) with SAP2000 will be conducted for a steel frame building. A Step-by-step modeling approach will be developed to describe the most general and common techniques associated with THA. This seminar has been created even for inexperienced SAP2000 users, so all are welcome to attend.