重庆建筑
重慶建築
중경건축
CHONGQING ARCHITECTURE
2015年
4期
31-33
,共3页
连续刚构桥%一致激励%多点激励%行波效应%自振特性
連續剛構橋%一緻激勵%多點激勵%行波效應%自振特性
련속강구교%일치격려%다점격려%행파효응%자진특성
continuous rigid frame bridge%uniform excitation%multi-support excitation%traveling wave effect
依托跨径布置为（68+128+68）m的某铁路预应力混凝土连续刚构桥，采用通用有限元软件建立空间动力模型研究了该桥的动力特性，对该桥在一致激励和行波效应下的内力和位移进行了对比分析。多点激励作用下的位移结果比一致激励作用下的结果大，并且随着波速的增大而逐渐逼近一致；行波效应对主墩墩顶和墩底截面的弯矩和剪力的影响明显。研究成果可为大跨径高墩铁路连续刚构桥的抗震设计提供参考。
依託跨徑佈置為（68+128+68）m的某鐵路預應力混凝土連續剛構橋，採用通用有限元軟件建立空間動力模型研究瞭該橋的動力特性，對該橋在一緻激勵和行波效應下的內力和位移進行瞭對比分析。多點激勵作用下的位移結果比一緻激勵作用下的結果大，併且隨著波速的增大而逐漸逼近一緻；行波效應對主墩墩頂和墩底截麵的彎矩和剪力的影響明顯。研究成果可為大跨徑高墩鐵路連續剛構橋的抗震設計提供參攷。
의탁과경포치위（68+128+68）m적모철로예응력혼응토련속강구교，채용통용유한원연건건립공간동력모형연구료해교적동력특성，대해교재일치격려화행파효응하적내력화위이진행료대비분석。다점격려작용하적위이결과비일치격려작용하적결과대，병차수착파속적증대이축점핍근일치；행파효응대주돈돈정화돈저절면적만구화전력적영향명현。연구성과가위대과경고돈철로련속강구교적항진설계제공삼고。
Based on a railway pre-stressed concrete continuous rigid frame bridge with span arrangement of (68+128+68)m, a spatial dynamic model is established by finite element software to study the dynamic characteristics of the bridge. The internal forces and displacements of the continuous rigid frame bridge under the uniform excitation as well as the traveling wave effect are analyzed. The displacement results of the multi-support excitation is larger than those of the uniform excitation and the results of the bridge is reduced gradually with the increase of the seismic wave velocity. The traveling wave effect has significant impact on the moment and shear of the pier's top and bottom section. The research results of this paper can provide reference for seismic design of long-span railway continuous rigid frame bridge with high piers.
