砌体结构中哑铃形墙体内力及变形集中效应分析  

Analysis of internal force and deformation concentration effects in dumbbell-shaped walls of masonry structures

作　　者：罗若帆 郭迅[2,3] 董孝曜 武继皎 阿拉塔 LUO Ruofan;GUO Xun;DONG Xiaoyao;WU Jijiao;A Lata(School of Civil Engineering,Jiaying University,Meizhou 514015,China;Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,China Earthquake Administration,Harbin 150080,China;Institute of Disaster Prevention,Key Laboratory of Building Failure Mechanism and Disaster Prevention,China Earthquake Administration,Sanhe 065201,China;Yunnan Earthquake Agency,Kunming 650041,China)

机构地区：[1]嘉应学院土木工程学院,广东梅州514015 [2]中国地震局工程力学研究所地震工程与工程振动重点实验室,黑龙江哈尔滨150080 [3]防灾科技学院中国地震局建筑物破坏机理与防御重点实验室,河北三河065201 [4]云南省地震局,云南昆明650041

出　　处：《地震工程与工程振动》2025年第2期155-163,共9页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(52278489);云南省地震局科技创新团队项目(CXTD202401);嘉应学院科研项目(2022KJZ01)。

摘　　要：基于实际震害与构件受力特征,提出以开间中线划分墙体单元,形成哑铃形构件。为验证哑铃形构件在受力过程中存在内力和变形集中现象,设计了等初始刚度的矩形和哑铃形构件拟静力试验,测试墙体剪应变和关键位置的相对位移。研究结果表明:哑铃形构件率先发生剪切破坏,破坏集中于窗间墙,楼板沿哑铃形构件一端垂直塌落。哑铃形构件截面剪应变明显高于矩形构件,且随着位移的增大,应变比值逐渐增大。窗间墙上下侧的相对位移显示,随着加载位移增大,窗上墙与窗间墙的位移比值逐渐减小,而窗间墙和窗下墙的位移比值逐渐增大。应变和位移数据均表明,哑铃形构件在变形过程中,内力和变形均逐渐向窗间墙集中。基于分析结果,对砌体结构和框架-砌体混杂式结构的破坏倒塌机制展开讨论。Based on the actual damage and the mechanical characteristics of the component,a dumbbell-shaped component is proposed by dividing the wall units along the midline of the span.To verify the phenomenon of internal force and deformation concentration during the loading process of dumbbell-shaped components,quasi-static tests of rectangular and dumbbell-shaped components with equal initial stiffness were designed.Wall shear strains and relative displacements at different positions were tested.The analysis results show that the dumbbell-shaped components undergo shear failure first,with damage concentrated between windows,causing the floor to collapse vertically along the side of the dumbbell-shaped component.Shear strains on the cross-section of dumbbell-shaped components are significantly higher than those of rectangular components,and the strain ratio gradually increases with displacement.Relative displacements on the upper and lower sides of the wall between windows indicate that as the loading displacement increases,the ratio of the upper wall to the wall between windows gradually decreases,while the displacement ratio between the wall between windows and the lower wall gradually increases.Both strain and displacement indicate that during the deformation process,internal forces and deformations gradually concentrate towards the wall between windows.Based on the analysis results,the collapse mechanisms of masonry structures and masonry-frame hybrid structures are discussed.

关 键 词：砌体结构 哑铃形构件 内力及变形集中 混杂式结构 倒塌机制 

分 类 号：TU375.4[建筑科学—结构工程] P315.92[天文地球—地震学]