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[1]左烨,孙广俊,李鸿晶.混凝土梁桥地震倒塌失效机制[J].南京工业大学学报(自然科学版),2018,40(03):73-80.[doi:10.3969/j.issn.1671-7627.2018.03.013]
 ZUO Ye,SUN Guangjun,LI Hongjing.Failure mechanism of concrete girder bridges collapse during earthquakes[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2018,40(03):73-80.[doi:10.3969/j.issn.1671-7627.2018.03.013]
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混凝土梁桥地震倒塌失效机制()
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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:
40
期数:
2018年03期
页码:
73-80
栏目:
出版日期:
2018-05-20

文章信息/Info

Title:
Failure mechanism of concrete girder bridges collapse during earthquakes
文章编号:
1671-7627(2018)03-0073-08
作者:
左烨孙广俊李鸿晶
南京工业大学 土木工程学院,江苏 南京 211800
Author(s):
ZUO YeSUN GuangjunLI Hongjing
College of Civil Engineering,Nanjing Tech University,Nanjing 211800,China
关键词:
混凝土梁桥 地震 连续倒塌 失效机制 多尺度模型
Keywords:
concrete girder bridge earthquake progressive collapse failure mechanism multi-scale refined model
分类号:
U448.2;U441+.3
DOI:
10.3969/j.issn.1671-7627.2018.03.013
文献标志码:
A
摘要:
倒塌失效是混凝土梁桥地震破坏的一个重要极限状态,揭示其机制对于提高结构的抗倒塌性能具有重要的现实意义和工程实用价值。对3种混凝土梁桥的非线性地震响应及倒塌破坏过程进行了数值模拟,从结构体系转化、桥墩受力及梁-墩碰撞作用等方面揭示了3种类型桥梁的地震损伤演化规律及连续倒塌机制。研究表明:梁-墩相对位移过大是造成落梁的前提条件,而落梁时梁-墩撞击作用进一步推动加剧了桥墩破坏和整体倒塌过程。连续梁桥的地震倒塌失效是一个整体连续的过程,简支-连续梁桥和简支梁桥的倒塌失效是一个局部连续过程。简支梁桥地震倒塌过程中桥墩受到的碰撞力在3种混凝土梁桥中最大。
Abstract:
Collapse failure is an important limit state of concrete girder bridge seismic damage,revealing its mechanism has important practical significance and practical engineering value for the improvement of structure collapse resistance.Nonlinear seismic response and collapse failure process of three types of concrete girder bridges were simulated to reveal the seismic damage evolution rule and progressive collapse mechanism of three types of concrete girder bridges from different aspects including structural system transformation,loading conditions of piers and girder-pier collision.The results showed that the excessive relative displacement between girder and pier was the premise condition of unseating failure,and girder-pier pounding effect aggravates pier damage and bridge overall collapse.Continuous girder bridge seismic collapse failure was a whole continuous process while simply support-continuous girder bridge and simply support girder bridge seismic collapse failure were local continuous process.Pounding force of simply support girder bridge pier was the largest in three types of concrete girder bridges.

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备注/Memo

备注/Memo:
收稿日期:2016-08-08
基金项目:国家自然科学基金(51308293,51478222); 江苏省自然科学基金(BK20130937)
作者简介:左烨(1989—),男,江苏涟水人,主要研究方向为桥梁抗震; 孙广俊(联系人),副教授,E-mail:gjsun2004@163.com.
引用本文:左烨,孙广俊,李鸿晶.混凝土梁桥地震倒塌失效机制[J].南京工业大学学报(自然科学版),2018,40(3):73-80..
更新日期/Last Update: 2018-05-31