带钢筋桁架楼承板的PRC连梁抗震性能试验研究及数值分析  

Experimental study and numerical analysis on seismic behavior of PRC coupling beams with steel bar truss deck

作　　者：田建勃[1] 赵勇 陈黄健 吕权 李柏林 穆林 TIAN Jianbo;ZHAO Yong;CHEN Huangjian;LV Quan;LI Bolin;MU Lin(School of Civil Engineering and Architecture,Xi’an University of Technology,Xi’an 710048,China;China Construction First Group Corporation Limited,Beijing 100161,China)

机构地区：[1]西安理工大学土木建筑工程学院,陕西西安710048 [2]中国建筑一局(集团)有限公司,北京100161

出　　处：《地震工程与工程振动》2024年第1期48-60,共13页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(51608441);陕西省自然科学基础研究计划项目(2022JM-220);中国博士后科学基金项目(2019M653878XB);陕西省教育厅专项科研项目(19JK0588)。

摘　　要：为适应超高层建筑以及现代工业化住宅建筑体系迅速发展的需要,提出了一种带钢筋桁架楼承板的新型钢板-混凝土组合(plate-reinforced composite,PRC)连梁。通过拟静力试验,分析了不考虑楼板作用、带普通钢筋混凝土(reinforced concrete,RC)楼板及带钢筋桁架楼承板PRC连梁的破坏形态、承载能力、变形能力和耗能能力等。在此基础上,采用ABAQUS软件分析在不同峰值荷载作用下钢筋桁架楼承板PRC连梁的混凝土、钢板和钢筋骨架的应力发展情况。研究结果表明:钢筋桁架楼承板的设置能显著提高小跨高比PRC连梁的受剪承载力、耗能能力和延性,设置楼板能显著提高连梁的峰值荷载,且带钢筋桁架楼承板对PRC连梁承载力的提升比带普通RC楼板更强,其连梁试件PRC-S3的正向峰值荷载比不带楼板连梁PRC-NS1和带普通RC楼板连梁PRC-S2分别提升了31%和18%,但带楼板连梁在梁板交界处产生通缝之后连梁的刚度退化较为严重;带钢筋桁架楼承板的PRC连梁具有优越的耗能能力,在连梁跨度范围内均出现了显著的对角压杆,主压杆及其衍生压杆共同构成桁架作用来承受剪力;楼承板桁架上下弦钢筋以及连梁纵筋均在连梁根部位置出现应力集中,且连梁试件PRC-S3破坏点对应的累积耗能是不带楼板试件PRC-NS1的1.39倍。In order to meet the needs of the rapid development of super high-rise buildings and modern industrialized residential building systems,a new type of plate-reinforced composite(PRC)coupling beam with steel bar truss deck is proposed.The failure mode,bearing capacity,deformation capacity and energy dissipation capacity of PRC coupling beams without considering the effect of floor slab,with ordinary reinforced concrete(RC)floor slab and with steel bar truss deck were studied by quasi-static test.At the same time,ABAQUS software was used to analyze the stress development of concrete,steel plate and steel skeleton of PRC coupling beam with steel bar truss deck under different peak loads.The results indicate that the shear bearing capacity and ductility of the coupling beam can be significantly improved with steel bar truss deck,and the setting of steel bar truss deck can significantly increase the peak load of the coupling beam,and the improvement of the bearing capacity of PRC coupling beam with steel bar truss deck is stronger than that with RC slab.The forward peak load of specimen PRC-S3 is 31%and 18%higher than that of PRC-NS1 and PRC-S2,respectively,but the stiffness degradation of the coupling beams with slabs were more serious after cracks were produced at the junction of beams and slabs.PRC coupling beams with steel bar truss deck have superior energy dissipation capacity,and there are significant diagonal compressive struts in the span of the coupling beams.The main compressive strut and its derivative compressive struts together constitute the truss to bear the shear force.Stress concentration occurs at the bottom of the coupling beam in the upper and lower chord reinforcement of the truss and the longitudinal reinforcement of the coupling beam,and the cumulative energy dissipation corresponding to the failure point of the coupling beam specimen PRC-S3 is 1.39 times that of the specimen PRC-NS1 without slab.

关 键 词：钢板-混凝土组合连梁 钢筋桁架楼承板 带板连梁 抗震性能 耗能能力 非线性有限元分析 

分 类 号：TU398.2[建筑科学—结构工程]