[1]王天利,李青宁.城市立交中分叉曲线桥梁地震响应研究[J].自然灾害学报,2018,(03):179-187.[doi:10.13577/j.jnd.2018.0321]
 WANG Tianli,LI Qingning.Research on earthquake response of fork curved bridge in the city interchange[J].,2018,(03):179-187.[doi:10.13577/j.jnd.2018.0321]
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城市立交中分叉曲线桥梁地震响应研究
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《自然灾害学报》[ISSN:/CN:23-1324/X]

卷:
期数:
2018年03期
页码:
179-187
栏目:
出版日期:
2018-06-28

文章信息/Info

Title:
Research on earthquake response of fork curved bridge in the city interchange
作者:
王天利 李青宁
西安建筑科技大学 土木工程学院, 陕西 西安 710055
Author(s):
WANG Tianli LI Qingning
Department of Civil Engineering, Xi’an University of Architecture & Technology, Xi’an 710055, China
关键词:
分叉曲线桥梁地震响应非线性时程分析法城市立交
Keywords:
fork curved bridgeearthquake responsenonlinear time history analysis methodcity interchange
分类号:
TU997;U442.5+5;X9
DOI:
10.13577/j.jnd.2018.0321
摘要:
城市立交中分叉曲线桥梁,结构多支分叉、非规则异型,质量和刚度分布不均匀,力学性能复杂,抗震分析和设计困难。以一座城市立交为工程依托,构建典型分叉曲线桥梁模型,进行六组地震工况作用下的非线性时程分析,并对比分叉曲线桥梁与组成分叉结构的各单支桥梁的地震响应差异,研究城市立交中分叉曲线桥跨结构的动力响应特性。结果表明:分叉曲线桥梁结构动力耦联效应显著,分叉桥梁的地震响应与组成分叉桥梁的各单支桥跨的地震响应差异大,分叉桥梁下部构件应建立分叉全桥空间三维动力模型,分叉节点异型主梁应建立局部实体模型;分叉曲线桥梁应按照单维、多维和E1、E2多种地震输入工况进行结构的最不利响应分析;分叉结构导致接入分叉点的桥跨地震位移响应增加,伸缩缝处碰撞、落梁震害概率加大,应引起工程人员的重视。
Abstract:
Fork curved bridge in the city interchange is an irregular structure. It has complicated mechanical property due to its uneven mass and stiffness, so its seismic analysis is difficult. A typical model of a fork curved bridge was built, and its nonlinear time history analysis was given under earthquake conditions. By contrasting the earthquake response of the fork curved bridge with that of its single bridges, its dynamic character was obtained. The simulation result gives three important points. The first is that the dynamic characters of the fork curved bridge has coupling effect, so the whole bridge space dynamic model should be built in order to get substructure earthquake response, but for a fork irregular girder the local solid model is needed. The second is that the different dimensions and intensity earthquake conditions are necessary for the most disadvantageous response of the fork curved bridge. The third is that for a single bridge accessing the fork node in the city interchange, probability of its collision and beam falling evidently increases. So these facts should be carefully treated.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2017-08-30;改回日期:2018-02-08。
基金项目:国家自然科学基金项目(51078306,51408453);陕西省教育厅科研计划资助项目(14JK1418);陕西省自然科学基础研究计划资助项目(2013JQ0007)
作者简介:王天利(1975-),女,副教授,博士,主要从事桥梁结构分析及抗震研究.E-mail:WTL-TY@163.com
更新日期/Last Update: 1900-01-01