索鞍约束方式对多塔自锚式悬索桥抗震性能的影响-地震工程与工程振动.PDF

30 5 V o.l 30 N o. 5 20 10 10 JOURNAL OF EARTH QUAKE ENG IN EER ING AND ENG INEER ING V IBRAT ION O ct. 2010 : 20 10) 房贞政, 张 超, 陈永健 ( , 350108 ) : : , 1 , : : P315. 952. 2 : A Influence of saddle con strain t condition on seism ic respon ses of selfanchored suspension bridge w ith m ultitow er FAN G Zhenzheng, ZHANG Ch ao, CH EN Y ongjian ( C ollege of C iv il Engineering, Fuzhou U n iv ersity, Fuzhou 350 108, C hina) Abs tract: Based on a project in Ch ina, the influence o f the saddle constra int cond ition on se ism ic respon ses o f the selfanchored su sp en sion bridge w ith threetow er is d iscussed by the FEM. T he invest igation show s that the u se o f the saddle connected to tow er w ith fin ite relat ive disp lacem ent, w ould lead to seism ic respones ch ange as follow ed: the de form at ion of tow er, the ax ial fo rce o f tow er and the safety factor aga in st cable sliding would increase the shear force and the bend ing m om ent o f tow er, the ax ial forces o f cable, suspender, and stringer and the deform ation of stringer w ould decrease and the mi p act force on the sadd le w ou ld be accomp an ied w ith. K ey w ord s: se lfanchored suspen sion bridge w ith m ultitow er safe ty factor again st cab le sliding fin ite re la tive disp lacem ent se ism ic respon se , [ 1] , , , , , , , , [ 2] , [ 3] , : 20 10- 04- 10 : 20 10- 05- 12 : ( 1949- ) ,