曲线箱梁桥剪滞效应分析

首先,本文提出了翼缘板平面内的应变函数,其横截面的正应力按三次抛物线规律变化。其次,运用变分原理导出微分方程,从而得到曲线箱梁桥剪滞效应的计算公式。在此基础上,编制了考虑曲率中心角和宽跨比两个重要因素的剪滞系数图表,可供实际应用。本文的理论公式是直、曲箱梁桥的普遍公式。

An Analysis of Shear Lag Effect in Curved Box Girder Bridges

First of all, this paper introduced strian functions in the plane of flange slab and expounded that its normal stress of the cross section varied with the third power parabola distribution. Sccondly.by means of the variational principle the paper presented differential equations to obtain computational formulas of shear lag effect in curved box girder bridges. Finally, based on the above analysis, graphs of shear lag coefficient were organized in accordance with span width ratio and central angle of curvature. These graphs were of practical value. The theoretical formulas given in the paper were general formulas of straight and curved box girder bridges.