大跨径拱桥索拱锚固区局部受力分析

LOCAL STRESS ANALYSIS OF THE ANCHORAGE ZONE IN LONG-SPAN ARCH BRIDGES

索拱锚固区是吊索拱桥的关键传力部位,构造复杂且承担荷载较大。文中以一座410m跨径的钢箱拱肋下承式系杆拱桥为研究对象,对拱顶和拱脚的索拱锚固区建立有限元模型进行计算,研究各板件的应力状态,分析吊索力的传力过程。计算结果表明,大桥的索拱锚固区构造合理,满足规范要求且有一定的安全储备,可为相关工程提供借鉴。

The anchorage zone of a cable-stayed arch bridge is a critical load-bearing area with complex structure and significant load-bearing capacity.This study focuses on a steel box arch rib with a 410-meter span and uses fi-nite element modeling to analyze the anchorage zones at the arch top and arch foot.The study examines the stress states of various components and analyzes the load transfer process of the suspension cables.The results indicate that the anchorage zones of the bridge are well-constructed,meet the design standards,and provide a certain level of safety reserve.These findings can serve as a reference for similar engineering projects.