弯桥直做对20m T形主梁的内力影响

摘要

以20 m T梁为对象,使用MIDAS建立直桥与弯桥模型,通过进行对比分析.研究弯桥直做法主梁的内力和相同踌径直桥主梁内力之间的差异.结果表明对二级公路中设计速度为60 km/h平曲线半径介于125 m和200 m之间的弯桥直做法的简支梁桥设计中,控制应力可在等跨径直桥的相应设计值基础上增大12%.%Through analysis of models of straight bridge and curved bridge, research on the difference of the internal force on the T-beams between the straight fabrication of curved bridge and the straight bridge of same span.The conclusions are as below:in the design of simple supported beam bridge, in the second-class highway with the design speed of 60 km/h, and the plane curve radius between 125 m and 200 m,control force can be 12％ more than the design value of the straight bridge with same span.