重庆石板坡长江大桥复线桥温度效应分析

温度应力是大型桥梁结构开裂及变形的重要影响因素之一。以石板坡长江大桥复线桥为背景,采用通用有限元程序MIDAS-Civil参考我国公路桥梁设计规范以及英国BS5400规范,首先研究了截面温度梯度和体系温变对该桥应力及变形的影响规律,然后将截面温度梯度和体系升温效应线性组合,探讨了它对复线桥的影响,并与移动荷载产生的效应进行了对比。研究结果对石板坡复线桥及同类桥梁结构的设计具有一定参考价值。

Temperature Effect Analysis of Chongqing Shibanpo Yangtze River Double Line Bridge

Thermal stress is one of the important influence factors of crack and deformation for large-span bridge struc-tures.Grounded on Shibanpo Yangtze River double line bridge and universal finite element program MIDAS-Civil with referring to specifications of China and British BS5400,above all,it is for this Bridge that the stress and deformation in-fluence is studied by setting section temperature difference and system temperature change,afterwards,the effect on the newborn bridge is discussed by combining impact of the section temperature difference and the system-calefaction linearly,and then,the effect is compared with the impact brought by moving load.The results will have a certain extent value for the design of ShiBanpo double line bridge and other similar bridges.