%0 Journal Article
%T 连续刚构宽箱梁剪力滞效应分析及有效分布宽度研究<br>Analysis of shear lag effect on box girder of continuous rigid frame bridge and its effective distribution width
%A 孙志伟
%A 刘英
%A 邬晓光
%A 王阳&lt
%A br&gt
%A SUN Zhiwei
%A LIU Ying
%A WU Xiaoguang
%A WANG Yang
%J 铁道科学与工程学报
%D 2016
%X 针对连续刚构桥箱梁的剪力滞效应和有效分布宽度进行研究,提出一种基于反弯点结合比拟杆法和叠加原理的剪力滞简化分析方法,同时通过有限元仿真分析剪力滞效应,并分别按《公路钢筋混凝土及预应力混凝土桥涵设计规范》(JTG D62—2004)建议的连续箱梁有效分布宽度公式和有限元分析结果计算连续刚构桥的有效分布宽度。以某大跨PC连续刚构箱梁桥为例,计算关键截面的剪力滞系数和有效分布宽度,分析其剪力滞分布规律,验证解析分析方法,建议实际设计中应重点关注边支点、边跨1/4L、中跨1/8L及中跨跨中截面,可为类似桥梁的剪力滞效应分析和设计提供参考。<br>Aiming at the shear lag effect of continuous rigid-frame box girder , this paper presented a simplified analysis method of shear lag that based on contraflexure points combined with analogy bar method and superposition principle; meanwhile, the shear lag effect was analyzed through the finite element simulation. The effective distribution width of the long span continuous rigid frame was calculated using the formula of continuous box girder in “highway reinforced concrete and prestressed concrete bridge and culvert design specifications (JTG D62-2004)”. A long-span PC continuous rigid frame box girder bridge was taken as an example, of which the shear lag coefficient and effective distribution width of cross sections were calculated. Their distribution regularity of shear lag were calculated to verify if the analytical method is reasonable. The findings indicate that the design needs to focus on the side fulcrum section, side span 1/4L section, main span 1/8L section and main span cross section. This study could provide reference for the analysis and design of the shear lag effect of similar bridges
%K 连续刚构
%K 比拟杆法
%K 有限元
%K 剪力滞
%K 有效分布宽度&lt
%K br&gt
%K continuous rigid frame bridge
%K analogy bar method
%K finite element
%K shearing force lag
%K effective distribution width
%U http://www.jrse.cn/paper/paperView.aspx?id=paper_311932