基于参数优化的刚构桥梁的抗裂性能研究

Influence of Crack Resistance Property by Changing Design Parameter of Rigid Frame Bridge

刚构桥梁的抗裂性能是桥梁设计人员非常关注的问题.如何通过设计参数的调整来提高桥梁的抗裂性能需要予以研究.由于刚构桥梁的设计参数较多且存在耦合,研究难度较大.采用正交试验方法,考虑主梁设计参数的变化,计算和分析了桥梁的抗裂性能.研究结果认为加大主梁根部的梁高对提高桥梁的抗裂性能最为显著.

Crack resistance property of rigid frame bridge is very important for bridge designers.The question is that how to improve the crack resistance property of bridge by adjusting design parameter.It is difficult to choose correct design parameter for designer because there are many design parameter of rigid frame bridge,and some of them are coupled.Orthogonal experiment method is used to analyze the crack resistance property of rigid frame bridge when changing design parameter of girder.The conclusion is that the height at root of beam affects the crack resistance property of mid span most.