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桥上荷载横向分布的规律与结构连接的刚度有着密切关系,横向连接刚度愈大,则横向分布作用愈显著,各梁(拱)的负担也愈均匀。通常来说,刚架拱桥的整体性较差,横向联系相对来说比不上普通的梁桥。本文通过对德庆县龙母大桥(刚架拱桥)进行静载试验,测试出其荷载横向分布系数,并将试验结果与用ANSYS建立的三种有限元模型模拟分析、弹性支承连续梁法、偏心压力法、推力体系比拟板法的理论计算结果进行分析比较,总结出大跨度刚架拱桥横向分布计算的最适用的计算方法。
The law of transverse distribution of load on bridge is closely related to the rigidity of structural connection. The greater the transverse connection stiffness, the more obvious the horizontal distribution is and the more uniform the load of each beam. Generally speaking, the rigid frame arch bridge integrity is poor, the horizontal link is relatively inferior to ordinary beam bridge. In this paper, the static load test of Longqin Bridge (frame arch bridge) in Deqing County is carried out to test the transverse distribution coefficient of the load. The simulation results of the test and three finite element models established by ANSYS, the elastic support continuous beam method, Eccentric pressure method and thrust system are compared with the theoretical calculation results of the slab method, and the most suitable calculation method of lateral distribution calculation of long-span rigid frame arch bridge is concluded.