复合主拱圈加固石拱桥关键技术研究  

Key Technology Research on Stone Arch Bridge Strengthened by Composite Main Arch Circle Method

作　　者：周磊[1] 周建庭[1] 黄灿[1] 张力文[1] 孙伊圣[1] 

机构地区：[1]重庆交通大学土木建筑学院,重庆400074

出　　处：《重庆交通大学学报（自然科学版）》2011年第4期747-750,共4页Journal of Chongqing Jiaotong University(Natural Science)

基　　金：重庆市重大科技攻关基金项目(CSTC2005AA6010);交通运输部西部交通建设科技项目(200431878518)

摘　　要：针对目前规范采用换算截面面积和惯性矩的方法计算石拱桥加固中组合截面承载力无法反应其各部分应力状态的现象,依托实际工程,进行有限元分析。结果显示:加固后原拱圈各截面在承载能力极限状态下的压应力有不同幅度的减小,而新增加固层截面处于较为不利的受拉应力状态,并分析了此加固技术的力学特点。A finite element analysis relying on actual project was conducted in view of the phenomenon that, the arch rein- forcement of composite section hearing capacity calculated by converting section area and moment of inertia cannot reflect to the stress state of each part. The results shows the maximum compressive stress of original arch section have reduced after reinforcement, while the new reinforced layer is under the negative state of tensile stress. It illustrates the mechanical characteristics of the reinforcement technique.

关 键 词：复合主拱圈 石拱桥 组合截面 受拉应力状态 

分 类 号：U442.53[建筑科学—桥梁与隧道工程]