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[1]孙广俊,李鸿晶,赵鹏飞.简支梁桥地震落梁失效控制模式研究[J].南京工业大学学报(自然科学版),2014,36(02):40-47.[doi:10.3969/j.issn.1671-7627.2014.02.007]
 SUN Guangjun,LI Hongjing,ZHAO Pengfei.Unseating failure control mode for simply supported girder bridge during earthquakes[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2014,36(02):40-47.[doi:10.3969/j.issn.1671-7627.2014.02.007]
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简支梁桥地震落梁失效控制模式研究()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
36
期数:
2014年02期
页码:
40-47
栏目:
出版日期:
2014-03-30

文章信息/Info

Title:
Unseating failure control mode for simply supported girder bridge during earthquakes
文章编号:
1671-7627(2014)02-0040-08
作者:
孙广俊12李鸿晶1赵鹏飞1
1.南京工业大学 土木工程学院,江苏 南京 211800; 2.北京工业大学 建筑工程学院,北京 100022
Author(s):
SUN Guangjun12LI Hongjing1ZHAO Pengfei1
1.College of Civil Engineering,Nanjing Tech University,Nanjing 211800,China; 2.College of Architecture and Civil Engineering,Beijing University of Technology,Beijing 100022,China
关键词:
简支梁桥 地震反应 失效控制 落梁 碰撞
Keywords:
simply supported girder bridge earthquake response failure control unseating collision
分类号:
U448.2;U441+.3
DOI:
10.3969/j.issn.1671-7627.2014.02.007
文献标志码:
A
摘要:
对地震作用下桥梁的落梁失效进行有效的控制,是桥梁抗震工程中的关键问题之一。考虑支座非线性、桥墩弹塑性和碰撞效应的影响,建立了5跨简支梁桥的有限元模型。采用非线性时程方法计算了多跨简支梁桥在墩-梁连接和梁-梁连接2种落梁失效控制模式下的纵向地震反应,并和无落梁失效控制时的桥梁反应进行了比较,分析了两类防落梁模式的控制机制和控制效果。研究了简支梁桥邻跨刚度比、防落梁连接刚度和初始间隙等参数对落梁失效控制效果的影响规律,进一步提出了有效的防落梁模式建议。研究表明:梁-墩连接控制模式可以有效地减小简支梁桥的位移反应,控制落梁失效,但会引起桥墩内力的增大,控制效果受到邻跨刚度比和控制系统参数的影响,梁-梁连接控制模式不能有效地控制落梁失效。
Abstract:
To control the unseating failure of bridges effectively during earthquakes was one of the key problems in field of bridge earthquake resistant engineering.By considering the nonlinear behavior of bearings,the elastic-plastic behavior of piers and the influence of collisions,a finite element model of a five-span simply supported girder bridge was established.The longitudinal seismic responses of multi-span simply supported girder bridge with pier-girder connection and girder-girder connection control mode of unseating failure were computed and compared with the results of bridge without unseating-prevention control.The control mechanism of unseating failures and effects of two unseating-prevention modes were analyzed.Furthermore,the influences of parameters such as the stiffness ratio of adjacent spans, the connection stiffness and the primary clearance of unseating-prevention connection were studied and suggestions were proposed. The research showed that the pier-girder connection unseating-prevention mode could effectively reduce the relative displacement response and control unseating failure. However,it increased the internal force in pier. The control effect depended on the stiffness ratio of adjacent spans and control parameters.Girder-girder connection unseating-prevention mode couldn’t effectively control unseating failures in earthquake.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2012-12-02
基金项目:江苏省高校自然科学基金(10KJA560012); 江苏省自然科学基金(BK20130937); 中国博士后科学基金(2012M520133)
作者简介:孙广俊(1979—),男,江苏南京人,副教授,博士,主要研究方向为结构抗震,E-mail:gjsun2004@163.com..
更新日期/Last Update: 2014-03-20