one statics and strength of materials ARCHITECTURAL STRUCTURES I: STATICS AND STRENGTH OF MATERIALS DR. ANNE NICHOLS FALL 2007 lecture ENDS 231
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1 ARCHITECTURAL STRUCTURES I: STATICS AND STRENGTH OF MATERIALS DR. ANNE NICHOLS FALL 2007 lecture one statics and strength of materials Introduction 1
2 Syllabus & Student Understandings Introduction 2
3 Course Description statics physics of forces and reactions on bodies and systems equilibrium (bodies at rest) structures something made up of interdependent parts in a definite pattern of organization Introduction 3
4 Course Description mechanics of materials external loads and effect on deformable bodies use it to answer question if structure meets requirements of stability and equilibrium strength and stiffness other principle building requirements economy, functionality and aesthetics Introduction 4
5 Structure Requirements stability & equilibrium STATICS Introduction 5
6 Structure Requirements (cont) strength & stiffness concerned with stability of components Introduction 6
7 Structural System Selection kind & size of loads building function soil & topology of site systems integration fire rating construction ($$, schedule) architectural form Introduction 7
8 Knowledge Required external forces internal forces material properties member cross sections ability of a material to resist breaking structural elements that resist excessive deflection deformation Introduction 8
9 Problem Solving 1. STATICS: equilibrium of external forces, internal forces, stresses 2. GEOMETRY: cross section properties, deformations and conditions of geometric fit, strains 3. MATERIAL PROPERTIES: stress-strain relationship for each material obtained from testing Introduction 9
10 Relation to Architecture The geometry and arrangement of the load-bearing members, the use of materials, and the crafting of joints all represent opportunities for buildings to express themselves. The best buildings are not designed by architects who after resolving the formal and spatial issues, simply ask the structural engineer to make sure it doesn t fall down. -Onouye & Kane Statics and Strength of Materials for Architecture and Building Construction Introduction 10
11 Architectural Structures incorporates stability and equilibrium strength and stiffness economy, functionality and aesthetics uses sculpture furniture buildings Introduction 11
12 Architectural Space and Form evolution traced to developments in structural engineering and material technology stone & masonry timber concrete cast iron, steel tensile fabrics, pneumatic structures... Introduction 12
13 The Fist Detroit, MI Introduction 13
14 AISC (Steel) Sculpture College Station, TX Introduction 14
15 Jamborie Philadelphia, PA Daniel Barret Introduction 15
16 Exploris Mobile Heath Satow Introduction 16
17 Telamones Chicago, IL Walter Arnold Introduction 17
18 Free Ride Home 1974 Kenneth Snelson Introduction 18
19 Zauber Laudenslager, Jeffery Introduction 19
20 Conference Table Heath Satow Introduction 20
21 Bar Stool Stainless Butterfly Daniel Barret Introduction 21
22 Chair Paul Freundt Introduction 22
23 End Tables Rameu-Richard Introduction 23
24 Steel House, Lubbock, TX Robert Bruno Introduction 24
25 Guggenheim Museum Bilbao Frank Gehry (1997) Introduction 25
26 Tjibaou Cultural Center, New Caledonia Renzo Piano Introduction 26 Photographer: John Gollings
27 Padre Pio Pilgrimage Church, Italy Renzo Piano Introduction 27 Photographer: Michel Denancé
28 Athens Olympic Stadium and Velodrome Santiago Calatrava (2004) Introduction 28
29 Milwaukee Art Museum Quadracci Pavilion (2001) Santiago Calatrava Introduction 29
30 Airport Station, Lyon, France Santiago Calatrava (1994) Introduction 30
31 Centre Georges Pompidou, Paris Piano and Rogers (1978) Introduction 31
32 Hongkong Bank Building (1986) Foster and Partners Introduction 32
33 Meyerson Symphony Center Dallas, TX Pei Cobb Freed & Partners Introduction 33
34 Crystal Cathedral, LA Philip Johnson (1980) Introduction 34
35 Federal Reserve Bank Minneapolis, MN Gunnar Birkerts & Associates Introduction 35
36 Hysolar Research Building Stuttgart, Germany ( ) Gunter Behnisch Introduction 36
37 Notre Dame Cathedral Paris, France Maurice de Sully Introduction 37
38 Habitat 67, Montreal Moshe Safdie (1967) Introduction 38
39 Villa Savoye, Poissy, France Le Corbusier (1929) Introduction 39
40 Riola Parish Church Riola, Italy Alvar Aalto (1978) Introduction 40
41 Kimball Museum, Fort Worth Kahn (1972) Introduction 41
42 Structural Math quantify environmental loads how big is it? evaluate geometry and angles where is it? what is the scale? what is the size in a particular direction? quantify what happens in the structure how big are the internal forces? how big should the beam be? Introduction 42
43 Structural Math physics takes observable phenomena and relates the measurement with rules: mathematical relationships need reference frame measure of length, mass, time, direction, velocity, acceleration, work, heat, electricity, light calculations & geometry Introduction 43
44 Physics for Structures measures US customary & SI Units Length Volume Mass Force Temperature US in, ft, mi gallon lb mass lb force F SI mm, cm, m liter g, kg N, kn C Introduction 44
45 Physics for Structures scalars any quantity vectors - quantities with direction like displacements summation results in the straight line path from start to end normal vector is perpendicular to something y Introduction 45 z x
46 Language symbols for operations: +,-, /, x symbols for relationships: (), =, <, > algorithms cancellation factors signs ratios and proportions power of a number conversions, ex. 1X = 10 Y / 6 operations on both sides of equality 2 5 5/ 2 2/ 1 = = = 6 2/ 3 3 x 1 6 = = Y 1X or 1X 10Y = 1 Introduction 46
47 On-line Practice Webct / Study Tools Introduction 47
48 Geometry angles right = 90º acute < 90º obtuse > 90º π = 180º triangles = b h 2 area hypotenuse total of angles = 180º B A C 2 2 AB + AC = BC 2 Introduction 48
49 Geometry lines and relation to angles parallel lines can t intersect perpendicular lines cross at 90º intersection of two lines is a point opposite angles are equal when two lines cross α β β α Introduction 49
50 Geometry intersection of a line with parallel lines results in identical angles α β α β β α β α two lines intersect in the same way, the angles are identical α α α Introduction 50
51 Geometry sides of two angles are parallel and intersect opposite way, the angles are supplementary - the sum is 180 α β α two angles that sum to 90 are said to be complimentary β + γ = 90 β γ Introduction 51
52 Geometry sides of two angles bisect a right angle (90 ), the angles are complimentary γ α α + γ = 90 right angle bisects a straight line, remaining angles are complimentary γ α Introduction 52
53 Geometry similar triangles have proportional sides D B A C E AB AD α A = AC AE = BC DE C A α γ β B C γ β AB A B = AC A C = BC B C B Introduction 53
54 Trigonometry for right triangles B sin cos tan opposite side = = sinα = hypotenuse adjacent side = = cosα = hypotenuse opposite side = = tanα = adjacent side AB CB AC CB AB AC C α SOHCAHTOA A Introduction 54
55 Trigonometry cartesian coordinate system origin at 0,0 coordinates in (x,y) pairs x & y have signs Quadrant II 3 Quadrant I Quadrant IV -5-6 Quadrant III Y X Introduction 55
56 Trigonometry for angles starting at positive x sinis y side cosis x side sin<0 for cos<0 for tan<0 for tan<0 for Y X Introduction 56
57 Trigonometry for all triangles sides A, B & C are opposite angles α, β & γ LAW of SINES sinα = A B sin β = B γ α sinγ C A C β LAW of COSINES A 2 = B 2 + C 2 2BC cosα Introduction 57
58 Algebra equations (something = something) constants real numbers or shown with a, b, c... unknown terms, variables names like R, F, x, y linear equations unknown terms have no exponents simultaneous equations variable set satisfies all equations Introduction 58
59 Algebra solving one equation only works with one variable ex: add to both sides divide both sides get x by itself on a side 2 x 1 = 0 2 x 1+ 1 = x = 1 2 / x 1 = 2/ 2 x = 1 2 Introduction 59
60 Algebra solving one equations Introduction 60 only works with one variable ex: subtract from both sides subtract from both sides divide both sides get x by itself on a side 2 x 1 = 4x + 5 2x 1 2x = 4x + 5 2x 1 5 = 2x / 2/ x = = 2 2/ 2/ x = 3
61 Algebra solving two equation only works with two variables ex: look for term similarity 2 x + 3y = 8 12 x 3y = 6 can we add or subtract to eliminate one term? Introduction 61 add get x by itself on a side 2 x + 3y + 12x 3y = x = 14 14x 14 = = x = 1
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