基于ANSYS的等截面连续箱梁桥腹板裂缝分析  

Analysis of Web Cracks of Continuous Box-Beam Bridges with a Constant Cross-Section Based on ANSYS

作　　者：贺志勇[1,2] 阳初[1] 张建军 

机构地区：[1]华南理工大学土木与交通学院,广东广州510640 [2]华南理工大学亚热带建筑科学国家重点实验室,广东广州510640 [3]珠海市交通勘察设计院有限公司,广东珠海519000

出　　处：《华南理工大学学报（自然科学版）》2013年第6期63-68,共6页Journal of South China University of Technology(Natural Science Edition)

基　　金：华南理工大学亚热带建筑科学国家重点实验室开放研究项目(2011KB14)

摘　　要：腹板裂缝是预应力混凝土连续箱梁桥的主要病害之一,但目前相关的研究较少,为此,文中依据某等截面预应力混凝土连续箱梁桥的病害检测结果,采用有限元软件ANSYS对比了不同厚度的梁桥腹板的主拉应力,分析裂缝产生的原因,并采用外贴钢板、环氧树脂封闭等加固措施对连续箱梁桥进行加固和跟踪检测.结果表明:腹板裂缝的出现与腹板厚度及腹板所配腹筋有关,这进一步验证了腹板厚度应大于60 cm的观点;加固后腹板裂缝的宽度和长度均未出现扩展和新增现象,表明该加固方法可有效控制腹板斜裂缝的扩展,该加固方案是可行和有效的.On web crack,one of the major problems existing in pre-stressed concrete continuous box-beam bridges,few studies have been conducted.In this paper,according to the monitoring results of a continuous box-beam bridge with constant cross-section,the major tensile stresses in the web with different thickness were discussed with the finite element software ANSYS,and the causes of cracks were analyzed.Moreover,some reinforcement measures such as employing steel plate and sealing epoxy resin were taken,and the reinforcement effect was finally confirmed by observations.The results show that the crack is greatly related to the web thickness and the web steel,so that the web thickness should be larger than 60cm;and that,after the reinforcement,there is no crack propagation and appearance in width and length directions,which means that the proposed reinforcement measures can effectively control further development of diagonal cracks of web and possess high feasibility and effectiveness.

关 键 词：连续箱梁桥 等截面 腹板裂缝 ANSYS 加固 

分 类 号：U448.213[建筑科学—桥梁与隧道工程]