内嵌轻质混凝土墙板部分包裹混凝土T形柱-H型钢梁装配式框架的抗震性能试验研究  

Experimental study on seismic performance of prefabricated frames with embedded lightweight concrete wall panels partially wrapped in concrete T-shaped columns and H-shaped steel beams

作　　者：王波[1,2,3] 杨帆[1,2] 王静峰[1,2,3] 孙嘉[1,2] WANG Bo;YANG Fan;WANG Jingfeng;SUN Jia(College of Civil Engineering,Hefei University of Technology,Hefei 230009,China;Anhui Provincial Key Laboratory of Civil Engineering Structure and Materials,Hefei University of Technology,Hefei 230009,China;Engineering Research Center of Low-carbon Technology and Equipment for Cement-based Materials,Ministry of Education,Hefei 230009,China)

机构地区：[1]合肥工业大学土木与水利工程学院,安徽合肥230009 [2]合肥工业大学土木工程结构与材料安徽省重点实验室,安徽合肥230009 [3]合肥工业大学水泥基材料低碳技术与装备教育部工程研究中心,安徽合肥230009

出　　处：《建筑结构学报》2024年第11期19-30,共12页Journal of Building Structures

基　　金：国家自然科学基金项目(52178136,52278170);中央高校基本科研业务费专项(PA2023GDSK0066);安徽高校协同创新项目(GXXT-2019-005)。

摘　　要：为研究内嵌轻质混凝土(ALC)墙板的部分包裹混凝土(PEC)T形柱-H型钢梁装配式框架的抗震性能,进行了两层一跨的1榀PEC-T形柱框架和1榀内嵌ALC墙板PEC-T形柱框架低周反复荷载对比试验,观察框架破坏现象,分析其滞回曲线、骨架曲线、刚度退化、耗能能力等。试验研究结果表明:PEC-T形柱-H型钢梁框架结构具有良好的抗震性能,两榀框架的屈服位移角约为1/130和1/110,而破坏位移角约为1/35,两榀框架各层的位移延性系数均大于2,满足结构抗震设计的要求;ALC墙板对框架刚度、承载力及耗能能力的贡献主要体现在受力初期,随着结构变形的进一步增加,ALC墙板提前退出工作,荷载主要由主体结构承担,且屈服后由于ALC墙板与主体结构的相互滑移导致框架后期整体耗能能力降低。通过有限元软件ABAQUS建立装配式框架有限元模型,发现弱填充墙对框架节点区影响较小,但随着上部层间刚度的增加,底层框架柱截面剪力占比提高,导致底层框架柱出现剪切滞后以及剪切破坏。To study the seismic performance of partially encased concrete(PEC) T-columns and H-shaped steel beam prefabricated frames with embedded lightweight concrete(ALC) wall panels,low-cycle repeated load comparative tests were conducted on one PEC T-column frame with two floors and one span,and one PEC T-column frame with embedded ALC wall panels.The failure phenomena of the frames was observed,and its hysteresis curves,skeleton curves,stiffness degradation,energy dissipation capacities,etc.were analyzed.The experimental results show that the PEC T-column H-shaped steel beam frame structure has good seismic performance,with yield drift angles of about 1/130 and 1/110 for the two frames,and failure drift angles of about 1/35.At the same time,the ductility coefficients of each floor of the two specimens are greater than 2,meeting the requirements of structural seismic design.The contribution of ALC wall panels to the stiffness,load-bearing capacity,and energy dissipation capacity of the frame is mainly reflected in the initial stage of stress.As the structure further deforms,the ALC wall panels withdraw from work early,with the load becoming mainly borne by the main structure.After yielding,the overall energy dissipation capacity of the frame decreases due to the sliding between the ALC wall panels and the main structure in the later stage.Using the finite element software ABAQUS,a prefabricated frame finite element model was established.The finite element analysis results show that weak infill walls have a relatively small impact on the frame node region.However,as the upper inter-story stiffness increases,the proportion of shear force in the bottom frame column section increases,leading to shear lag and shear failure of the bottom frame column.

关 键 词：装配式框架 部分包裹混凝土T形柱 ALC墙板 拟静力试验 有限元分析 抗震性能 

分 类 号：TU398.9[建筑科学—结构工程] TU317.1