预埋型钢的装配式钢管混凝土柱-钢筋混凝土梁框架力学性能试验和有限元分析  

Mechanical Properties Test and Finite Element Analysis of Prefabricated CFST Column-RC Beam Frame with Embedded Steel

作　　者：黄文雄[1] 王俊辉 梅宏洁 秦响 刘永航 HUANG Wenxiong;WANG Junhui;MEI Hongjie;QIN Xiang;LIU Yonghang(School of Urban Construction,Yangtze University,Jingzhou 434023,China)

机构地区：[1]长江大学城市建设学院,湖北荆州434023

出　　处：《工业建筑》2023年第12期157-163,共7页Industrial Construction

摘　　要：为了研究预埋型钢的装配式钢管混凝土柱-RC梁框架的整体力学性能与破坏形式,以实际工程为依据,设计并制作了单层两跨装配式框架结构进行静载试验和数值模拟,试验结果表明:结构呈现典型的三阶段破坏特征,破坏截面出现在靠近中柱两侧的梁上,距离框架节点核心区域有一定距离;结构破坏时,型钢和钢管柱均处于弹性阶段,结构具有较高的安全储备;节点传力性能良好,各部分构件可以协调变形,装配式框架具有良好的整体性。在验证了有限元模型的精度和可靠性后,使用有限元法进行参数化拓展分析,分别研究了梁混凝土强度、梁宽、纵筋强度、纵筋配筋率和钢混结合段长度对结构承载能力的影响,计算结果表明:在本参数范围内,增加梁混凝土强度、梁宽、纵筋强度、配筋率和结合段长度均可以提高结构的承载能力;其中梁宽、配筋率对承载能力的提升比较明显,但数值较大时增幅变小;预埋型钢可以控制临界裂缝的出现部位。In order to study the overall mechanical properties and failure forms of the prefabricated CFST column-RC beam frame with embedded steel,based on the actual engineering,a single-story two-span prefabricated frame structure was designed and fabricated for static load tests and numerical simulations,the test results showed that the structure exhibitsed typical three-stage failure characteristics,and the failure section appeared on the beams on both sides of the central column,which was a certain distance from the core area of the frame joint;it had a high safety reserve;the joints had good force transmission performance,each part of the components could be deformed in coordination,and the prefabricated frame had good integrity.After verifying the accuracy and reliability of the finite element model,the finite element method was used to carry out parametric expansion analysis,and the effects of beam concrete strength,beam width,longitudinal rebar strength,longitudinal rebar reinforcement ratio and steel-concrete joint section length on bearing capacity of the structure were studied respectively.The calculation results showed that:within the range of this parameter,increasing the beam concrete strength,beam width,longitudinal rebar strength,reinforcement ratio and length of the joint section could improve the bearing capacity of the structure;the improvement of the bearing capacity was obvious,but the increase became smaller when the value was larger;the embedded section steel could control the occurrence of critical cracks.

关 键 词：多跨框架结构 力学性能 有限元模拟 装配式框架 预埋型钢 参数化分析 

分 类 号：TU398.9[建筑科学—结构工程] TU317