外倾式非对称系杆拱桥总体结构计算分析

摘要

To study the stability and ultimate bearing capacity of tied-arch bridge with extroversion asymmetric arch ribs, this paper, taking the Vehicular Bridge at Jiaomen River Central Area of Nansha District as a case, calculates the overall structure of the bridge using finite the commercial software MIDAS Civil, analyzes the ultimate bearing ca-pacity during the bridge operation stageand the elastic-plastic stability under steady state. The results show that all the indexes of this Bridge can meet the requirements of specification with good stability and reliability.%为研究外倾式拱桥稳定及极限承载力问题，以广州南沙蕉门河中心区车行桥为背景，采用MIDAS Civil有限元程序建立全桥有限元模型进行主桥总体结构计算，对该桥运营阶段的极限承载力以及弹塑性稳定状态下的稳定性进行分析。分析结果表明该桥各项指标均能满足规范要求，稳定性良好可靠。