基于梁格法在用简支梁桥荷载横向分布应用研究

Applied study about transverse load distribution of the Simple Beam Bridge with beam grid method

基于梁格理论建立在用简支梁桥空间梁格有限元计算分析模型,分析了纵梁间不同横向连接形式的模拟及虚拟横梁间距、截面特性值的取值对荷载横向分布的影响特征和规律.同时,提出了基于梁格法调整纵梁间横向弯矩传递有效值及虚拟横梁截面特性值的在用简支梁桥荷载横向分布实用计算方法,并通过与实际桥梁结构静载试验的挠度、应力等结果的对比,验证了方法的正确性.

This paper mainly analyzes the effects on the transverse load distribution of characteristics and the law of the different form of lateral connections simulation, virtual beam spacing and the value of the virtual beam stringer section characteristic, according to the space beams FEM of simply-supported beam bridge on the basis of the Beam Girder Theory. Meanwhile, the methods exactly simulating the transverse load distribution of simply supported beam bridge with adjusting the valid values of Transverse moment Pass and the virtual beam calcula- tion parameters are put forward, which are proved by load experiments, compared with the static load test of the actual bridge structure deflection and stress.