梁线模型在半刚性连接预制综合管廊中的应用  

APPLICATION OF BEAM-LINE MODEL IN THE PRECAST UTILITY TUNNEL WITH SEMI-RIGID CONNECTION

作　　者：王庆华 沈华[2] 马燕婧[2] WANG Qinghua;SHEN Hua;MA Yanjing(College of Civil Engineering,Tongji University,Shanghai 200092,China;School of Architectural Engineering,Nantong Vocational University,Nantong 226007,Jiangsu,China)

机构地区：[1]同济大学土木工程学院,上海200092 [2]南通职业大学建筑工程学院,江苏南通226007

出　　处：《力学与实践》2023年第1期140-149,共10页Mechanics in Engineering

基　　金：南通市科技项目(MS22020025,MSZ21046)资助。

摘　　要：预制综合管廊在侧壁中间设置拼缝,采用预应力筋连接,连接接头既能发生相对转动,又能传递弯矩,具有半刚性特征。梁线模型将半刚性梁的弯矩-转角直线(需求线)与接头的弯矩-转角曲线(性能线)绘制在一起,通过两者的交点可以确定接头转动刚度。采用经试验验证的Abaqus有限元模型,开展了以拼缝界面应力和壁厚为主要参数的接头受弯有限元分析。基于有限元分析结果,提出了梁线模型用于预应力筋连接预制拼装管廊的结构设计方法。The precast utility tunnel is assembled in the middle of the sidewalls and connected by prestressing tendons, and its connection joints can both rotate relatively and transfer bending moment with semi-rigid characteristics. The beam-line model plots the moment-rotation straight line of the semi-rigid beam(demand line) and the moment-rotation curve of the joint(performance line) together, and the joint rotational stiffness can be determined through the intersection of the two. Using the experimentally validated Abaqus finite element model, a finite element analysis of the bending performance of the joint with the splice interface stress and sidewall thickness as the main parameters was carried out. Based on the results of the finite element analysis, a beam-line model is proposed for the structural design of precast utility tunnel connected by prestressing tendons.

关 键 词：梁线模型 半刚性 预制 综合管廊 转动刚度 

分 类 号：TU354[建筑科学—结构工程]