Seismic Performance of Symmetrical and Asymmetrical Buildings with Heavy Loads
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1 Seismic Perfrmace f Symmetrical ad al Buildigs with Heavy Lads Md. Jaweed Jilai Kha, Seshadri Sekhar ad Bellam Sivarama Krisha Prasad esearch Schlar, Departmet f Civil gieerig esearch, Gitam Uiversity, udraram, Patacheru Madal, Hyderabad, elagaa-59, Idia. Prfessr ad Dea, Nicmar, Jagaguda, Shameerpet, Hyderabad, elagaa-5, Idia. Prfessr ad Head, Gitam Uiversity, udraram, Patacheru Madal, Hyderabad, elagaa-5, Idia. rcid Id: Abstract I this study the fcus is the seismic desig f buildigs with heavy ladigs such as Data ceter Buildigs which are cmpared with the rmal buildigs with rmal lads. Buildigs may be symmetric r asymmetric i pla r elevati which depeds the stiffess ad mass distributi i each strey. Hilly regis f Idia fall uder the high seismic zes. Behavir f the buildig differs i hilly terrai frm the ther buildigs plais. he differet flr f buildigs hilly areas steps twards the hill backwards ad simultaeusly may have setbacks als. Due t cmplex cfigurati, these buildigs are highly asymmetric ad irregular. Buildig with heavy lads ad cstructed i hilly areas are mre vulerable t attract higher seismic frces. I this study, D Aalytical mdels f symmetric ad asymmetric buildigs are geerated fr hilly terrai ad plais with rmal ad heavy ladigs, which are aalyzed usig liear structural aalysis tl "ABS 9..". he effect f slpig grud clums which have varyig height are studied, the pla layut csidered is same fr hilly terrai ad plais fr bth rmal ad heavy lads. study the effects f ifill s, seismic aalysis is de usig liear dyamic (respse spectrum methd) as well as liear static prcedure (pushver) has bee perfrmed. Keywrds: N-Liear aalysis, respse spectrum methd, pushver methd, data ceter, heavy lads, symmetric buildigs, buildigs. INDUCIN Due t rapid urbaizati ad space cruch there is icrease i.c. framed buildigs cstructi hilly areas. Buildigs which are cstructed i hilly areas with slpig grud are highly irregular ad asymmetrical i ature. Buildigs cstructed slpig gruds attracts severe trsi whe subjected t lateral frces due t earthquake. Usually buildigs cstructed slpig gruds are supprted by clums f varyig heights, Sice the stiffess f shrt clums is mre, it attracts mre frces thus shrt clums are susceptible t uderg mre damage due t earthquake. Ladig buildigs ca vary frm rmal cmmercial lads t heavy lads fr special buildigs used fr specific purpse, such as Data cetre buildigs. Digitizati ad Glbalizati leads t prducti ad strage f huge data. Cmpare t earlier ways f utsurcig the data strage t specialize cmpaies, wadays mst f the rgaizatis prefer t have their w setup fr data strage. he buildigs which huses cmplete cmputer, telecmmuicatis ad strage systems alg with its cmpets are called Data cetre buildigs. Structurally Data cetre buildigs have t supprt heavy lads impsed it due t equipmets f I.., elecmmuicatis ad strage systems. I this Study, Separate D aalytical mdels are geerated fr symmetrical buildigs plai areas ad asymmetrical buildigs hilly terrais, with rmal cmmercial ladig (K/m) ad heavy ladig f Data cetre (8.K/m). study the seismic effects f ifills symmetrical ad asymmetrical mdels with ad withut heavy ladig, seismic aalysis is perfrmed usig liear dyamic ( spectrum methd) ad liear static methds ( aalysis). Pla layut f all the aalytical mdels are kept same fr symmetrical buildigs plai gruds ad asymmetrical buildigs slpig gruds. MHDS hree differet types f D aalytical mdels are geerated fr symmetrical ad asymmetrical buildigs, first with rmal cmmercial ladigs ad the with heavy lads f data cetre buildigs. Symmetrical mdels f buildigs plai grud is geerated with equal height f clums grud strey. al mdels f buildigs slpig hilly terrai is geerated with the height f grud strey clums varyig frm m t.8m 8
2 Mdel-: Buildig mdel is csidered as bare frame withut walls. Mdel-: Buildig mdel csidered have walls i grud strey. I upper stries full brick masry walls f mm thickess is csidered. Geerated mdel icludes bth the mass ad stiffess f ifill wall. Mdel-: Buildig mdel csidered have full brick masry wall f mm i upper flrs. I grud strey, walls are csidered i all the bays alg the periphery f buildig i lgitudial directi, whereas i trasverse directi it is csidered ly i the ed bays alg periphery. Geerated mdel icludes bth the mass ad stiffess f ifill wall. able : Desig Parameters Lad Dead Lads Masry Ccrete Itesity.kN/m 5.kN/m Live Lads (Nrmal Cmmercial.kN/m buildig) Live Lad (Data Cetre buildigs) 8.kN/m f Lad.kN/m Flr Fiishes.kN/m Imprtace Factr reducti factr 5. Figure : Pla Mdel (Symmetrical) Member Prperties used fr mdelig f structural elemets are tabulated i able-. able : Member Prperties Member Clums Dimesi mm 5x5 Figure : levati Mdel (Symmetrical) Beams 5x6 Slab Wall Figure : Pla Mdel (Symmetrical) 9
3 Figure : levati Mdel (Symmetrical) Figure 7: D View Mdel (al) Figure 8: levati Mdel (al) Figure 5: Pla Mdel (Symmetrical) Figure 6: levati Mdel (Symmetrical) Figure 9: D View Mdel (al)
4 SULS Lateral displacemet results f Symmetric ad buildig mdels with rmal cmmercial ladig ad with heavy ladigs are cmpared fr respse spectrum methd ad aalysis. Figure : levati Mdel (al) Displacemet fr & directi fr (Spec- & Spec-) ad fr methd f aalysis (Push- & Push-) are shw i able fr symmetrical as well as asymmetrical buildig Mdel- with Nrmal cmmercial ladig. able. Displacemets: & fr Symmetrical ad al Buildigs fr Mdel- uder Nrmal cmmercial Ladig. MDL- NMAL LADS (CMMCIAL S Symmetric Figure : D View Mdel (al) Displacemet fr & directi fr (Spec- & Spec-) ad fr methd f aalysis (Push- & Push-) are shw i able fr symmetrical as well as asymmetrical buildig Mdel- with Heavy ladig. able : Displacemets: & fr Symmetrical ad al Buildigs fr Mdel- uder Heavy Ladig. MDL- HAV LADS (DAA CN S Symmetric Figure : levati Mdel (al)
5 Displacemet fr & directi fr (Spec- & Spec-) ad fr methd f aalysis (Push- & Push-) are shw i able 5 fr symmetrical as well as asymmetrical buildig Mdel- with Nrmal cmmercial ladig. able 5: Displacemets: & fr Symmetrical ad al Buildigs fr Mdel- uder Nrmal cmmercial Ladig. MDL- NMAL LADS (CMMCIAL S Symmetric Displacemet fr & directi fr (Spec- & Spec-) ad fr methd f aalysis (Push- & Push-) are shw i able 6 fr symmetrical as well as asymmetrical buildig Mdel- with Heavy ladig. able 6: Displacemets: & fr Symmetrical ad al Buildigs fr Mdel- uder Heavy Ladig. MDL- HAV LADS (DAA CN S Symmetric Displacemet fr & directi fr (Spec- & Spec-) ad fr methd f aalysis (Push- & Push-) are shw i able 7 fr symmetrical as well as asymmetrical buildig Mdel- with Nrmal cmmercial ladig. able 7: Displacemets: & fr Symmetrical ad al Buildigs fr Mdel- uder Nrmal cmmercial Ladig. MDL- NMAL LADS (CMMCIAL S Symmetric Displacemet fr & directi fr (Spec- & Spec-) ad fr methd f aalysis (Push- & Push-) are shw i able 8 fr symmetrical as well as asymmetrical buildig Mdel- with Heavy ladig. able 8: Displacemets: & fr Symmetrical ad al Buildigs fr Mdel- uder Heavy Ladig. MDL- HAV LADS (DAA CN S Symmetric Figure. Shws the cmparis f displacemets values i mm fr Mdel-, symmetrical buildigs subjected t Nrmal ladig ad Heavy Ladig i bth & directi.
6 SM-M-NL-SPC SM-M-NL-SPC SM-M-NL-PUSH SM-M-NL-PUSH SM-M-HL-SPC SM-M-HL-SPC SM-M-NL-SPC SM-M-NL-SPC SM-M-NL-PUSH SM-M-NL-PUSH SM-M-HL-SPC SM-M-HL-SPC SM-M-HL-PUSH SM-M-HL-PUSH SM-M-HL-PUSH SM-M-HL-PUSH Figure : Displacemet: & directi fr Mdel- symmetrical buildigs. Figure. Shws the cmparis f displacemets values i mm fr Mdel- al buildigs subjected t Nrmal ladig ad Heavy Ladig i bth & directi. Figure 5.: Displacemet: & directi fr Mdel- symmetrical buildigs. Figure 6. Shws the cmparis f displacemets values i mm fr Mdel-, al buildigs subjected t Nrmal ladig ad Heavy Ladig i bth & directi. ASM-M-NL-SPC ASM-M-NL-SPC ASM-M-NL-SPC ASM-M-NL-PUSH ASM-M-NL-PUSH ASM-M-HL-SPC ASM-M-NL-SPC ASM-M-NL-PUSH ASM-M-NL-PUSH ASM-M-HL-SPC ASM-M-HL-SPC ASM-M-HL-SPC ASM-M-HL-PUSH ASM-M-HL-PUSH Figure : Displacemet: & directi fr Mdel- al buildigs. Figure 5. Shws the cmparis f displacemets values i mm fr Mdel-, Symmetrical buildigs subjected t Nrmal ladig ad Heavy Ladig i bth & directi ASM-M-HL-PUSH ASM-M-HL-PUSH Figure 6: Displacemet: & directi fr Mdel- al buildigs. Figure 7. Shws the cmparis f displacemets values i mm fr Mdel-, Symmetrical buildigs subjected t Nrmal ladig ad Heavy Ladig i bth & directi.
7 SM-M-NL-SPC SM-M-NL-SPC SM-M-NL-PUSH SM-M-NL-PUSH SM-M-HL-SPC SM-M-HL-SPC SM-M-HL-PUSH SM-M-HL-PUSH susceptible t the high trsi. al buildigs f Mdel-, Mdel- & Mdel- have mre displacemets cmpare t their respective symmetrical mdels. ) Frames f buildigs cstructed slpig gruds f hilly regi are subjected t mre displacemets as the clum heights i grud strey varies, as buildigs step backs. ) Displacemets i buildigs with heavy ladig f data cetre are higher cmpare t the buildigs with rmal ladig fr respse spectrum methd. 5) Presece f ifills have verall effect the behavir f buildigs whe subjected t the seismic frces. Displacemets are csiderably reduced i Mdel- because the effect f ifill walls is csidered. Figure 7: Displacemet: & directi fr Mdel- symmetrical buildigs. Figure 8. Shws the cmparis f displacemets values i mm fr Mdel-, al buildigs subjected t Nrmal ladig ad Heavy Ladig i bth & directi Figure 8: Displacemet: & directi fr Mdel- al buildigs. CNCLUSIN ASM-M-NL-SPC ASM-M-NL-SPC ASM-M-NL-PUSH ASM-M-NL-PUSH ASM-M-HL-SPC ASM-M-HL-SPC ASM-M-HL-PUSH ASM-M-HL-PUSH ) Buildigs cstructed hilly slpig terrai are very irregular i cfigurati ad behaves differetly tha thse built plais. ) Lateral displacemets due t earthquake i buildigs is mre cmpare t the symmetrical buildigs, as asymmetrical buildigs are irregular i ature ad are FNCS [] Applied echlgy Cucil, AC-, Seismic evaluati ad retrfit f ccrete buildigs, Vl. ad, Califria 996. [] Chpra AK, Gel K. A mdal pushver aalysis prcedure t estimate seismic demads fr buildigs: hery ad prelimiary evaluati, eprt. N. P /, Pacific arthquake gieerig esearch Ceter, Uiversity f Califria, Berkeley, Califria.,. [] Pakaj Agrawal, Maish Shrikhade, arthquake esistat Desig f Structures, Pretice Hall Idia Publicati. [] Bagle S. araath, extbk f McGraw Hill Iteratial ditis, Structural Aalysis ad Desig f all Buildig, 988, pp [5] Data Cetre Prjects: stablishig a Flr Pla White Paper # By Neil asmusse & Wedy rell (APC America pwer cversi 7). [6] Murat Saatciglu, JagMha Humar., Dyamic aalysis f buildigs fr earthquake resistat desig Caadia Jural f Civil gieerig,, Vl., N. : pp [7] ee Kee Seg., Wu iaghua., Lim Hwee Kwag ad Wg Mar Chee Ag Ch Keat "Plaig ad Desigig Data Cetres" [8] IS: 89 (Part ) - Idia stadard- Criteria fr earthquake resistat desig f structures, Bureau f Idia Stadards, New Delhi. [9] Md. Jaweed Jilai Kha, Bellam Sivarama Krisha Prasad Siesmic ffects Buildigs with Data Cetre lads, Iteratial jural f Advaced eserach i
8 Basic gieerig Scieces ad echlgy (IJABS), VLUM, SPCIAL ISSU - APIL 7, pp.7-8 [] ABS liear versi 9.. Cmputers ad Structures, Ic, CA. 5
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