连续斜梁桥受力特性研究

Experimental Study of Sprayed-concrete Reinforcement for Highway Bridge

基于梁格法理论,建立了4跨连续斜梁桥的有限元模型。分别采用了各种不同支座刚度计算连续斜梁桥的支反力分布以及主梁内力分布情况。计算结果表明,支座刚度对于连续斜梁桥的支反力分布影响较大,减小支座刚度可使得支反力分布更为均匀。支座刚度对于内力的分布影响相对较小,减小支座刚度会增加主梁弯矩值,但同时可以减小主梁的扭矩值。

Based on beam girder theory, a finite element model of a continuous skew girder bridge with four spans is presented. Several support stiffness are adopted during the calculation of the distribution of the bearings＇ restraint forces and the main girders＇ force. The calculation results showe that the supporting stiffness has much effect on the distribution of restraint forces of the bearings. The smaller the support stiffness, the more uniform the restraint forces are. The effect of support stiffness to the main girders＇ force is small in relative. With the decrease of the supporting stiffness, the moment of flexure of the girders increase but the moment of torsion decrease slightly. The results have an important significance to the design and construction.