螺栓连接装配式墙板结构连接节点本构模型及体系建模方法  

Constitutive Model of Bolted Connections and Modeling Method of Bolt Connected Precast Concrete Wall Panel Structure

作　　者：熊峰 吴朝安[3] 冉明明 钟亚超 王宇豪 XIONG Feng;WU Chaoan;RAN Mingming;ZHONG Yachao;WANG Yuhao(MOE Key Laboratory of Deep Underground Science and Engineering,Sichuan University,Chengdu 610065,China;Failure Mechanics&Engineering Disaster Prevention and Mitigation,Key Laboratory of Sichuan Province,Sichuan University,Chengdu 610065,China;College of Architecture and Environment,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学深地科学与工程教育部重点实验室,四川成都610065 [2]四川大学破坏力学与工程防灾减灾四川省重点实验室,四川成都610065 [3]四川大学建筑与环境学院,四川成都610065

出　　处：《工程科学与技术》2025年第1期145-156,共12页Advanced Engineering Sciences

基　　金：国家自然科学基金项目(52278197);国家重点研发计划项目(2020YFD1100700);成都市科技项目(2022YF0500395SN)。

摘　　要：螺栓连接装配式墙板结构体系具有建造快速、施工便捷、连接可靠、可拆卸和可修复等优势,适合低多层乡村住宅建筑,近年来工程应用逐渐增多。该体系预制墙板之间采用离散的干式螺栓连接,受力时接缝处产生滑移变形,与传统的现浇剪力墙结构或湿法连接的剪力墙结构存在本质区别,为了分析结构体系的整体性,建立适合该结构体系的“非等同现浇”的抗震设计方法具有重要意义。本文结合已进行的螺栓连接节点轴向拉伸试验和剪切试验,提出螺栓连接节点拉伸和剪切的本构模型。在此基础上,将单个螺栓连接节点简化为3个平动自由度(x、y、z)的非线性弹簧,模拟连接节点的力学行为,建立简化计算模型。借助螺栓连接预制墙板的拟静力试验结果验证了螺栓连接节点简化模型的有效性,显示可用于分析结构体系的抗震性能。基于节点简化模型,依托Midas Gen软件,提出了螺栓连接装配式墙板结构体系的建模方法。以实际工程为例,建立了该结构的设计模型,并进行在小震、中震作用下的弹性分析及大震作用下的弹塑性时程分析。结果表明:在各地震工况下,螺栓连接装配式墙板结构体系侧向位移较小,层间位移角分别小于弹性位移角限值的1/1200和弹塑性层间位移角限值的1/120,符合规范要求,螺栓连接节点承载力满足抗震需求,墙板角部混凝土没有被压溃,说明螺栓连接装配式墙板结构体系抗震性能优越。研究成果可为螺栓连接装配式墙板结构体系的工程建设提供设计依据,为该新型结构体系的推广奠定理论基础。Objective The bolt-connected precast concrete wall panel structural system provides multiple advantages,including speedy construction,convenient installation,trustworthy connections,disassembly,and repairability,which make it particularly suitable for low-rise rural residential buildings.In recent years,the engineering applications of this system have steadily increased.This research conducts studies on the bolt-connected precast concrete wall panel structure,including bolted connection node tests,wall panel tests,and structural system tests.The failure modes of the specimens are identified accordingly.The force transmission characteristics and seismic performance of the structure are systematically analyzed.In addition,calculation methods for the bearing capacities of nodes and wall panels are proposed.Numerical analysis software must be adopted to evaluate the integrity of the structural system and establish seismic design methods.However,existing solid element models or simplified calculation models based on the Opensees platform are challenging to converge during calculations,requiring a high level of professionalism from designers.Therefore,a simplified model of wall panels and bolted connection nodes is developed in this research to adapt to current engineering design software,facilitating the engineering application of this structural system.Methods This study simplifies a single bolted connection node into three translational degrees of freedom(x,y,z)nonlinear springs to simulate the mechanical behavior of the connection node and establish a simplified calculation model based on the analysis of the force transmission mechanism of bolted connection nodes.Formulas for calculating the tensile and shear bearing capacities of bolted connection nodes are proposed based on axial tensile and shear tests of bolted connection nodes.In addition,constitutive models for tension and shear of bolted connection nodes are established.Then,the effectiveness of the simplified model of bolted connection nodes is verified thr

关 键 词：装配式混凝土墙板结构 螺栓连接 本构模型 体系建模方法 抗震设计 

分 类 号：TU375[建筑科学—结构工程]