摘要
本文通过设置独柱墩连续梁桥偏载下的抗倾覆稳定性分析试验,研究独柱墩连续梁桥偏载下发生倾覆时的支座反力、整体应力分布以及向心侧、离心侧发生倾覆现象等力学性能分析。研究表明:(1)当发生离心倾覆时,无论是单跨还是多跨达到倾覆临界状态所需应力值远小于向心倾覆;(2)发生离心倾覆时,单跨至多跨整体倾覆所需弯矩差距较小,更容易发生整体式桥体倾覆;当发生向心倾覆时,单跨至多跨整体倾覆所需弯矩差距较大,发生单跨桥体倾覆时,再发生整体倾覆仍有足够的安全储备;(3)发生倾覆现象时,远端的支座反力值最大,需引起足够的重视;对于向心倾覆而言,整跨倾覆支反力最大;对于离心倾覆而言,单跨所产生的的支反力最大。
In this paper,through the analysis and test of overturning stability of single column pier continuous beam bridge under eccentric load,the bearing reaction force,overall stress distribution and overturning phenomenon of centripetal side and centrifugal side of single column pier continuous beam bridge under eccentric load are studied.The results show that:(1)when centrifugal overturning occurs,the stress value required to reach the critical state of single span or multi span is far less than that of centripetal overturning;(2)when centrifugal overturning occurs,the difference of bending moment required for single span to multi span overall overturning is smaller,which makes it easier for integral bridge body to overturn;when centripetal overturning occurs,the difference of bending moment required for single span to multi span overall overturning is larger When a single span bridge is overturned,there is still enough safety reserve for overall overturning;(3)when overturning occurs,the far end bearing reaction value is the largest,which needs to be paid enough attention to;for centripetal overturning,the whole span overturning support reaction is the largest;for centrifugal overturning,the single span is the largest.
作者
薛野
范文哲
伍玲
邓泽鑫
XUE Ye;FAN Wen-zhe;WU Ling;DENG Ze-xin(School of Civil Engineering and Architecture,Wuhan Institute of Technology,Wuhan 430074)
出处
《广州建筑》
2020年第6期3-7,共5页
GUANGZHOU ARCHITECTURE
关键词
桥梁工程
独柱墩
抗倾覆性能
力学性能分析
bridge engineering
single column pier
anti overtuming performance
mechanical property analysis
