地震作用下简支梁桥非线性碰撞分析.PDF

26 3 V o.l 26 N o. 3 20 10 9 W OR LD EA RTHQUAKE ENG INEER ING Sep. 20 10 : 1007 - 6069 ( 20 10) 03- 0022 - 08 1 2 1 徐建国, 陈 淮 , 王 博 ( 1. , 450002 2. , 450001) : , K elv in , ( W en ) , , ( 3) , , , , : K elv in : U 44 2. 5+ 5 P3159522 : A N on linear pound ing analysis of a sim p le b eam bridge under earthquakes 1 2 1 XU Jianguo , CHEN H u ai , WANG Bo ( 1S chool of Env ironm en t and H ydrau lic Engin eering, Zh engzhou U n iv ersity, Zhengzhou 450002, C hina 2S chool of C iv il Engineering, Zhengzhou U n iv ersity, Zhengzhou 450002, C h ina) Abs tract: Based on the energy princ iple, the thin-w a ll beam elem ent o f bridge sup erstru cture is estab lished. A c- cord ing to K elv in contact m ode,l under the con sideration o f nonlinear bearing hysteretic characteristics (W en m od- el) and the w aves for variou s site condit ions, the long itud inal se ism ic pound ing response of three sp an smi ple beam br idge o f Jinggangao m otorw ay is stu died. T he ca lculat ion resu lts show that the pounding tmi es and respon se peak valu es of the bridge superstru cture are increased obviou sly w ith augm ent ing p eak acce leration s. The jo int pounding affects the seism ic respon ses, and the c learance of expan sion jo int and the span ra tio affects the pound ing response a lot. T he pound ing respon se is sensit ive to the frequ ency spectra o f the se ism ic w aves. The pounding calcu lation w