【導(dǎo)讀】1訪問學(xué)者,土木工程學(xué)院,得克薩斯大學(xué),奧斯汀,TX78712,PH:512-232-9216;能或多種荷載形式及自然周期的多樣性。彈塑性分析法的荷載分布狀態(tài)有三角形、IBC（k=2），和矩形。在這個研究中四種典型的鋼筋混凝土框架結(jié)構(gòu)被采用，它。非線性時程分析法是計算地震的最好方法，但美國。的FEMA-273容量震譜法和ATC-40位移系數(shù)法推薦使用靜力彈塑性分析法。文將比較分別利用靜力彈塑性分析法與非線性時程分析法分析所得到的結(jié)果。法也被執(zhí)行來對照。在不同地震下分布在全球的50個站點紀(jì)錄了地面運動情況被用。一般的抗震設(shè)計中僅僅只有安全和碰撞是在地震設(shè)計規(guī)范中明確要求避免的，這樣在低的地震水平下就要求考慮結(jié)。構(gòu)的非彈性行為。結(jié)構(gòu)周期相關(guān)的系數(shù)，用來定義荷載豎向因素。據(jù)取至距離地面最大為20km的近地范圍內(nèi)。40cmx40cm，后兩層為30cmx30cm。曲線斜率方面的改變表明了各有限元的屈服強度。除此之外，這些曲線還表示結(jié)構(gòu)抗側(cè)力的損失情況和柱位移下的剪切破壞。

　　

【正文】 13 Anza (Hors e Cany 02/25/1 980 USGS TVY04 5 A StrikeSlip 38 Coyot el Lake 08/06/1 979 CDM G SJ3337 B StrikeSlip 14 Coyot e Lake 08/06/1 979 CDM G G013 20 A StrikeSlip 39 Coyot el Lake 08/06/1 979 CDM G SJ5337 B StrikeSlip 15 Hollist r 11/28/1 974 CDM G G012 47 A StrikeSlip 40 Impe ria l Valle y 10/15/1 940 UNA M /UC SD HAE P0 45 C StrikeSlip 16 Koca eli 08/17/1 999 ERD GBZ0 00 A StrikeSlip 41 Impe ria l Valle y 10/15/1 940 USGS HBR A3 15 C StrikeSlip 17 Koca eli 08/17/1 999 ERD IZT180 A StrikeSlip 42 Hollist r 11/28/1 974 CDM G ASJB 033 B StrikeSlip 18 Whittie r Narr ow 10/04/1 987 CDM G BOB R 270 B Reve r se Obliqu e 43 Hollist r 11/28/1 974 CDM G DSG 3 UP B StrikeSlip 19 Morg a n Hill 04/24/1 984 CDM G G013 20 A StrikeSlip 44 Impe ria l Valle y 10/15/1 979 USGS HPT S 315 B StrikeSlip 20 San Frans. 03/22/1 957 USGS GGP 1 00 A Reve r se Norm al 45 Impe ria l Valle y 10/15/1 940 USGS HCX O 22 5 C StrikeSlip 21 Whittie r Narr ow 10/01/1 987 USC AGR N 18 0 A Reve r se Norm al 46 Impe ria l Valle y 10/15/1 940 USGS HCH I 012 C StrikeSlip 22 Anza (Hors e Cany) 02/25/1 980 USGS RDA 045 B StrikeSlip 47 Lande rs 06/28/1 992 CDM G JOS09 0 B StrikeSlip 23 Cape Mendo.. 04/25/1 992 CDM G FOR 00 0 B Reve r se Norm al 48 Lande rs 06/28/1 992 USGS MVH 00 0 B StrikeSlip 24 N. Palm Spring s 07/081 986 CDM G PSA090 C Reve r se oblique 49 Liver. 01/27/1 980 CDM G BLM O3 55 B StrikeSlip 25 Coyot e Lake 08/06/1 979 CDM G G021 40 C StrikeSlip 50 Impe ria l Valle y 10/15/1 940 UNA M /UC SD HQK P 085 C StrikeSlip 60/60 3m fy= 22 kN/cm 2 Beams: 25x50 : As= cm2 25x55 : As= cm2 60/60 60/60 60/60 3m 30/60 3m 30/60 3m 3m 60/60 30/30 50x50 : As= cm2 80x80 : As= cm2 25/50 3m 25/50 25/50 3m 25/50 25/50 25/50 25/50 25/50 40/40 50/50 50/50 50/50 50/50 3m 50/50 25/55 25/55 25/55 60/60 60/60 3m 80/80 3m 80/80 3m 80/ 80 3m 80/80 3m 80/80 3m 80/80 3m 80/80 30/60 3m 30/60 3m 30/60 3m 30/60 3m 30/60 3m 30/60 3m 30/60 3m 30/60 3m 3m 3m 8m 8m 8m 3story 8m 8m 8m 5story 8m 8m 8m 8story 8m 8m 8m 15Story (a) (b) (c) (d) Figure 1. Diagram of analyzed 3, 5, 8 and 15story R\C frames with typical cross sections and steel reinforcements V/W V/W V/W V/W V/W V/W RC Frame, Pushover Curve, Rectangular Load RC Frame, Pushover Curve, Triangular Load RC Frame, Pushover Curve, IBC (k=2) Load 2nd floor 2nd floor 2nd floor 3rd floor 3rd floor 3rd floor 4th Floor 4th floor 4th floor 5th floor 5th floor 5th floor 6th floor 6th floor 6th floor 7th floor 7th floor 7th floor 8th floor 8th floor 8th floor Roof Roof Roof displacem ent (cm) displacem ent (cm) displacem ent (cm) Figure 4. Pushover Curves of 8story R\C Frame for three different Load Patterns RC Frame, Pushov er Curve, Rectangular Load 2nd floor 3rd floor 4th floor 5th floor 6th floor 7th floor 8th floor 9th floor 10th floor 11th floor 12th floor 13th floor 14th floor 15th floor Roof RC Frame, Pushover Curve, Triangular Load 2nd floor 3rd floor 4th floor 5th floor 6th floor 7th floor 8th floor 9th floor 10th floor 11th floor 12th floor 13th floor 14th floor 15th floor 16th floor RC Frame, Pushov er Curve, IBC (k=2) Load 2nd floor 3rd floor 4th floor 5th floor 6th floor 7th floor 8th floor 9th floor 10th floor 11th floor 12th floor 13th floor 14th floor 15th floor Roof displacement (cm) displacement (cm) displacem ent (cm) V/W V/W V/W V/W Figure 5. Pushover Curves of 15story R\C Frame for three different Load Patterns 0 .1 6 0 .1 4 0 .1 2 0 .1 0 0 .0 8 0 .0 6 0 .0 4 0 .0 2 0 2 4 6 8 10 12 displacement (cm) 0 .0 0 0 2 4 6 8 1 0 1 2 1 4 1 6 dis p la cem ent (c m ) Rectangular Triangular IBC A and B site classes C site class D site class R e c ta n g u lar Trian g u la r IB C A a n d B s ite c la s s es C s ite c la s s D s ite c la s s a) 3Story Frame b) 5Story Frame 0 2 4 6 8 10 12 14 16 18 20 displacement (cm) 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 displacement (cm) Rectangular Triangular IBC A and B site classes C site class D site class Rectangular Triangular IBC A and B site classes C site class D site class c) 8Story Frame d) 15Story Frame Figure 6. Pushover and Nonlinear Time History Results of 3, 5, 8 and 15story Frames