偏心荷载作用下钢楔式活络端力学性能研究  

Study on Mechanical Properties of Disconnectable Coupling Joint With Steel Wedges(DCJS)Under Eccentric Load

作　　者：谢治天 牛晓凯 李鹏飞[3] 张明聚[3] 刘晓[1] 宋伟 XIE Zhitian;NIU Xiaokai;LI Pengfei;ZHANG Mingju;LIU Xiao;SONG Wei(Faculty of Materials and Manufacturing,Beijing University of Technology,Beijing 100124,China;Beijing Municipal Engineering Research Institute,Beijing 100037,China;Key Laboratory of Urban Security and Disaster Engineering,Ministry of Education,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学材料与制造学部,北京摇100124 [2]北京市市政工程研究院,北京100037 [3]北京工业大学城市与工程安全减灾教育部重点实验室,北京100124

出　　处：《北京工业大学学报》2025年第1期59-71,共13页Journal of Beijing University of Technology

基　　金：国家自然科学基金资助项目(51978018,51738010)。

摘　　要：为了解决钢楔式活络端在偏心荷载作用下工作机理的研究相对较少的问题,该文定量研究钢楔式活络端的抗弯性能,首先建立经过试验结果验证的有限元模型,然后通过数值分析的方法,系统研究偏心载荷作用下钢楔式活络端的变形和受力机理,并对钢楔式活络端的抗弯性能进行参数化分析,基于参数分析结果,建立适用于钢楔式活络端的弯矩-转角模型。研究结果显示:钢楔式活络端的抗弯性能随偏心距、钢楔高度和中肋板高度的增加而降低,随钢楔长度、钢楔宽度、槽钢厚度和钢管壁厚的增加而增加,同时本文所建立的弯矩-转角模型能够准确地预测钢楔式活络端的弯矩-转角曲线、初始抗弯刚度和塑性抗弯承载力。To quantitatively study the flexural performance of the disconnectable coupling joint with steel wedges(DCJS),the validated finite element model was established based on the test results of the DCJSs.Subsequently a series of finite element models were used to systematically study the deformation and force mechanism of the DCJS under eccentric load.The flexural performance of the DCJDs was analyzed through the parameterization method.Based on the outcomes of the parametric study,the moment-rotation model was established for DCJS.Results show that the flexural performance of the DCJS decreases with the increase of eccentricity,wedge height and midrib height,and increases with the increase of wedge length,wedge width,channel thickness and tube wall thickness.Meanwhile,the moment-angle curve,initial flexural stiffness and plastic flexural capacity of the DCJS can be accurately predicted by the moment-rotation model.

关 键 词：基坑工程 钢楔式活络端 抗弯性能 弯矩-转角模型 有限元模型 参数分析 

分 类 号：TU43[建筑科学—岩土工程]