基于抗扭失效的桥梁抗倾覆研究.pdf

文档介绍：基于抗扭失效的桥梁抗倾覆研究
阴存欣秦大航包琦玮罗玲
(北京市市政工程设计研究总院北京 100082)
摘要:本文根据作者从事的桥梁抗倾覆调查及研究的经验为基
础,系统详细地阐述了桥梁抗倾覆分析的方法,并通过直桥和弯
桥从未脱空到脱空,从脱空到倾覆的全过程分析,得出了基于抗
扭失效的桥梁抗倾覆规律,即桥梁倾覆为约束体系不断变化条件
下桥梁体系抗扭刚度不断降低的非线性发展过程,同时提出了提
高桥梁抗倾覆性能的各种措施。
关键词:桥梁,独柱支承,扭转,抗倾覆
Study on Bridges’Resisting Capsizing on the Base of
Invalidity of Torsion Stiffness
Yin cunxin,Qin dahang,Bao qiwei,Luo ling
(Beijing General Municipal Engineering Design & Research
Institute,Beijing 100082)
ABSTRACT: Based on the experience of research and study on
stability of bridges ’ resisting capsizing, methods of
research and analysis of bridges ’ capability of stability
on resisting capsizing have been described. According to
the calculation and analysis result of the total procedure
from initial status to the stage of bearing’s separation
from restriction, and to the capsizing status, the laws of
the loss stability in torsion performance of bridge has
been drawn that it’s really a nonlinear procedure which
shows a decrease of torsion stiffness with different
supporting systems in different stages. The countering
methods of upgrading the torsion resisting performance of
bridges are also propounded.
KEYWORDS: bridge, supporting systems with single pole,
torsion, resisting capsizing.

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一、引言
独柱桥梁具有轻巧纤细美观的建筑效果,近年来大量市政和公路桥梁都采用了独柱桥
梁的结构体系,如图 1~2,但是由于严重超载和规范的空白以及前期设计认识上的可能不足等
多方面的原因,全国各