2016年10月下 施工技术 第45卷第20期 CONSTRUCTION TECHNOLOGY 91 D0I:10.7672/5j52016200091 超大型地下连续墙钢筋笼吊装过程动态数值 模拟和现场试验研究* 王志华,魏林春,王善谣2,祝强,魏文晖2 (1.上海隧道工程有限公司,上海200232:2.武汉理工大学道路桥梁与结构工程 湖北省重点实验室,湖北武汉430070) [摘要]基于三维有限元数值模拟法,对超大型地下连续墙钢筋笼施工吊装过程进行动态数值模拟.以钢筋笼从 水平到竖直的起吊过程中0°,30°,60°3种工况建立能够模拟动态吊装过程的有限元模型,并进行现场试验.结合 数值模拟和现场试验结果分析了动力效应影响下的笼体受力规律,确定了吊装过程的最不利工况,并在此分析方 法基础上对钢筋笼吊装施工进行损伤分析和方案优化分析.研究结果表明:有限元数值模拟结果和现场试验结果 基本吻合,验证了理论分析的正确性;钢筋笼吊装过程中动力效应明显,30°时纵向、横向桁架钢筋出现最大应力, 应力分布整体表现为吊点位置附近应力较大,且动力效应非常明显,当该部位出现焊接损伤时,极易造成施工事 故,应予以重视;通过对吊装方案进行优化,可显著提高吊装施工的安全性和经济性. [关键词]地下连续墙;吊装;动力系数;应力;数值模拟 [中图分类号]TU476*.3 [文献标识码]A [文章编号]1002-8498(2016)20-0091-05 Study of Dynamic Numerical Simulation and Field Test on the Lifting Process of Ultra Large Scale Diaphragm Wall Wang Zhihua' Wei Linchun' Wang Shanyao2 Zhu Qiang' Wei Wenhui2 (1.Shanghai Tunnel Engineering Co.Lad.Shanghai 200232 China;2.Hubei Key Laboratory of Roadway Bridge and Structure Engineering Wuhan University of Technology Wuhan Hubei 430070 China) Abstract:Dynamic numerical simulation based on 3D FEM was conducted on the lifting process of the reinforcement cage of ultra large scale diaphragm wall.The degrees of0°,30°,60°from horizontal to vertical were chosen as the basic working conditions of the FEM to simulate the dynamic lifting process. With the influence of dynamic effect the stress distribution of the reinforce cage was studied through both numerical simulation and field test methods.The most unfavorable condition of lifting process was found damage...
超大型地下连续墙钢筋笼吊装过程动态数值模拟和现场试验研究.pdf
