波形钢腹板组合箱梁桥剪力滞效应研究

STUDY ON SHEAR LAG EFFECT OF COMPOSITE BOX GIRDER BRIDGE WITH CORRUGATED STEEL WEBS

波形钢腹板组合箱梁由于其力学性能和经济性能比普通箱梁优越而正被广泛地使用,本文介绍了计算波形钢腹板组合箱梁桥剪力滞系数的能量变分法,用有限元分析软件ANSYS进行了波形钢腹板组合箱梁桥的建模,并采用能量变分法的结果加以验证。结果表明采用有限元法模拟波形钢腹板组合箱梁桥的剪力滞效应效果较好,分析了波形钢腹板组合箱梁桥横桥向和纵桥向剪力滞系数的变化规律。

Corrugated steel web combined box girder bridge with corrugated steel webs is a new type of bridge structure, which is used to replace the traditional concrete web with corrugated steel webs. The corrugated steel web composite box girder is being used more and more widely because of its superior me- chanical properties and economic performance than ordinary box girders. This means that it is necessary to study the shear lag effect of the corrugated steel web combined box girder. This paper first introduces the calculation of shear lag coefficients of the box girder with corrugated steel webs of the energy varia- tional method, then, the finite element analysis software ANSYS was used to model the corrugated steel web composite box girder bridge and using the energy variational method to verify the results. The results show that the effect of finite element method on the shear lag effect of corrugated steel web composite box girder bridge is good. At the same time, the variation law of shear lag coefficient of transverse bridge and longitudinal bridge of corrugated steel web composite box girder bridge was also tested. It is proved that the shear lag effect of corrugated steel web composite box girder bridge has a good application prospect.