摘要
本文介绍了桥梁三维空间分析系统,对湘潭公路二桥宽翼变截面箱梁桥的90m主跨作了详尽的空间有限元计算分析,绘出了主跨的横截面和纵截面上的应力图,并与平面连续梁模型的计算结果进行分析比较.计算结果反映了在顺桥和横梁方向截面正应力以及剪应力的变化影响,表明在桥梁设计中进行空间应力分析是非常必要的.
In this paper, the spacial stress analysis computer system for bridges (BSACAD) is presented.The 90m long main span of the box girder bridge with variable cross section and wide flange in Xiangtan city is analyzed in detail by spacial finite element method(FEM).The stresses in cross section and longitudi-nal section calculated by this method are plotted in diagrams and compared with those computed by plane beam element.The result, obtained from spacial FEM, reveals the variations of the normal stresses along the longitudinal and transverse directions of the girder,as well as the shear lag effect.The research shows that it is necessary to analyze the spacial stresses in bridge design.
出处
《土木工程学报》
EI
CSCD
北大核心
1994年第4期23-29,共7页
China Civil Engineering Journal
