采用小半径曲线梁的立交匝道桥设计

简单介绍了曲线梁桥的特点。结合某匝道桥设计,采用有限元实体单元进行初步设计计算,列出了恒载、汽车活载、温度梯度、整体温差以及支座沉降内力组合下,各荷载及其组合对支座反力和弯矩的影响。根据计算结果,分析了产生梁端内侧支座脱空和梁体发生横向爬移的原因。给出了采取预偏心和墩梁固结优化设计后的支座反力和弯矩,2项措施能有效解决曲线梁支座脱空情况。以空间梁单元的方法对实体单元计算结果进行校核,结果显示计算可靠。

A Study of Interchange Ramp Bridge Design with Small Radius Curve Bridge

This paper presents the features of curve bridge briefly.Combined with a project of some ramp bridge,the influence is carried out about the support reaction and bending moment by every load and relevant combinations through the analysis of the dead load,live load,temperature gradient,overall temperature difference and bearing settlement internal force by means of finite solid element initial design and calculation.According to the results,the reasons are analyzed about resulting in girder inside bearing voi...