[1]孙武云,范新荣,王小明,等.高烈度山区中等跨径连续梁桥合理[J].长安大学学报(自然科学版),2021,41(2):125-134.
 SUN Wu yun,FAN Xin rong,WANG Xiao ming,et al.Seismic performance of mediumspan continuous beam bridges in highintensity mountainous areas based on different seismic structural systems[J].Journal of Chang’an University (Natural Science Edition),2021,41(2):125-134.
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高烈度山区中等跨径连续梁桥合理()
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长安大学学报(自然科学版)[ISSN:1006-6977/CN:61-1281/TN]

卷:
第41卷
期数:
2021年2期
页码:
125-134
栏目:
桥梁与隧道工程
出版日期:
2021-03-15

文章信息/Info

Title:
Seismic performance of mediumspan continuous beam bridges in highintensity mountainous areas based on different seismic structural systems
作者:
孙武云范新荣王小明李立峰吴钊华
(1. 云南武倘寻高速公路有限责任公司,云南 昆明 651500; 2. 湖南大学 土木工程学院,湖南 长沙 410082; 3. 云南交投集团公路建设有限公司,云南 昆明 651500)
Author(s):
SUN Wuyun12 FAN Xinrong1 WANG Xiaoming3 LI Lifeng2 WU Zhaohua2
(1. Yunnan Wutangxun Expressway Co., Ltd, Kunming 651500, Yunnan, China; 2. School of CivilEngineering, Hunan University, Changsha 410082, Hunan, China; 3. Yunnan CommunicationsInvestment Group Highway Construction Co., Ltd., Kunming 651500, Yunnan, China)
关键词:
桥梁工程合理抗震体系易损性支座高烈度山区钢混组合桥
Keywords:
bridge engineering reasonable seismic system vulnerability bearing high intensity mountainous steelconcrete composite bridge
文献标志码:
A
摘要:
针对高烈度山区桥梁的抗震问题,以高烈度山区的中等跨径钢混组合梁桥——云南省天生大桥为研究对象,研究其合理抗震结构体系布置。建议了山区桥梁的抗震评估分析流程,提出了6种抗震基本体系,并考虑各构件的非线性特征,采用桥梁抗震专用软件OpenSees建立了各体系的全桥精细化非线性动力有限元模型;考虑地震波的不确定性,从PEER数据库中共选择了100条不同强度范围的地震波,对依托工程的基本抗震体系进行了全过程非线性时程分析;利用获得的非线性分析结果,基于地震易损性分析理论分别建立了构件、系统易损性关系曲线,从损伤概率上对该桥梁抗震性能及危险构件进行了评估。结果表明:支座和挡块属于抗震体系的关键构件,支座的易损性随着损伤程度的增大逐步高于其他各类危险构件,挡块的损伤概率也较高;设置高阻尼隔震橡胶支座和挡块后能有效降低各构件的损伤概率,并有效提高系统的抗震性能,对结构抗震有利;综合考虑构件易损性和系统易损性,推荐采用高阻尼隔震橡胶支座及双层挡块的抗震设防措施作为依托工程的最终抗震体系。提出的桥梁合理抗震体系的概念和相应的抗震评估分析流程,可为高烈度山区桥梁抗震设计提供参考。
Abstract:
Aiming at the seismic problem of bridges in highintensity mountainous areas, Yunnan Tiansheng Bridge, a middlespan steelconcrete composite beam bridge in a highintensity mountainous area, was taken as the research object to explore the reasonable seismic structure arrangement. The seismic evaluation and analysis process of mountainous bridges was proposed, six seismic basic systems were proposed, and then, a series of refined nonlinear dynamic models taking nonlinear proprieties into consideration were established by OpenSees. Considering the uncertainty of seismic wave, 100 seismic waves with wide intensity range based the PEER database were selected for the whole process nonlinear time history analysis of the engineering bridge and a lot of results of nonlinear analysis were obtained. According to these results, the theory of seismic vulnerability analysis was adopted, the vulnerability curves of components and systems were established by using the nonlinear dynamic method. Based on the damage probability, the seismic performance and dangerous components of the bridge were evaluated. The results show that the bearing and the block are the key components of the seismic system and with the increase of damage degree, the vulnerability of bearing is gradually higher than other kinds of dangerous components, and the damage probability of block is also higher, which are the key components of seismic system. Setting high damping rubber bearing and block can effectively reduce the damage probability of bridge components and improve the seismic performance of the system, which is beneficial to seismic. Considering the component failure and system failure comprehensively, it is recommended to adopt the seismic measures of high damping rubber bearing and doublelayer block as the final seismic system of the supporting project. The concept of reasonable seismic system of bridge and the corresponding seismic evaluation and analysis process can be used as a reference for seismic design of high intensity mountainous bridges. 3 tabs, 11 figs, 38 refs.

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更新日期/Last Update: 2021-04-02