桃花峪黄河大桥吊杆-主梁锚固区受力分析  

Force Condition Analysis of Suspender and Main Girder Anchorage Zones of Taohuayu Huanghe River Bridge

作　　者：陈国红 宋晓莉 

机构地区：[1]山东省交通规划设计院,山东济南250031

出　　处：《桥梁建设》2014年第3期44-50,共7页Bridge Construction

摘　　要：桃花峪黄河大桥主桥为主跨406m的大跨度钢箱梁自锚式悬索桥。该桥吊杆-主梁锚固区采用锚箱式锚固结构,由布置在钢箱梁腹板外侧的锚固板、承压板及加劲板等组成,板杆空间交错,受力复杂。为验证该桥锚固区受力的合理性,采用ANSYS建立主梁空间节段有限元模型,对锚固区各板件的受力状况、锚固板件与箱梁外腹板焊缝受力特性及吊杆索力的扩散规律进行了分析,得到锚固区的受力特性。结果表明:吊杆索力通过锚头锚圈、垫板、承压板、锚固板、主梁腹板传递扩散到整个钢箱梁断面;锚固区各板件应力均满足规范要求,结构受力合理且应力在各板件间传递流畅。The main bridge of the Taohuayu Huanghe River Bridge is a long span self-an- chored steel box girder suspension bridge with a main span of 406 m. The suspender and main girder anchorage zones of the bridge are the steel anchor box anchorage structures that are com- prised of the anchoring plates, bearing plates and stiffening plates arranged outside the webs of the steel box girder. The plates and members in the anchorage structures are spatially staggered and the force conditions thereof are complicated. To verify the rationality of the force conditions of the anchorage zones, the ANSYS was used to establish the spatial sectional finite element mod- el for the main girder. The force conditions of various plates of the anchorage zones, the force characteristics of the welding seams connecting the anchoring plates and the outer webs of the steel box girder and the spreading law of the suspender cable forces were analyzed and the force conditions of the anchorage zones were hence gained. The results of the analysis show that the suspender cable forces transfer and spread to the whole cross section of the steel box girder via the anchor bands, padding plates, bearing plates, anchoring plates and the webs of the main gird- er. The stress of the various plates of the anchorage zones can meet the relevant requirements in the codes, the force conditions of the anchorage structures are rational and the transfer of the stress from plate to plate is smooth.

关 键 词：自锚式悬索桥 吊杆-主梁锚固区 设计 受力分析 有限元法 

分 类 号：U448.25[建筑科学—桥梁与隧道工程]