装配式预制混凝土柱-钢梁干式连接节点抗震性能及转动刚度研究  

Research on Seismic Performance and Rotational Stiffness of Dry Connections Between Prefabricated RC Columns and Steel Beams

作　　者：芦静夫 许雷雨 田春雨 申佳妮 Jingfu Lu;Leiyu Xu;Chunyu Tian;Jiani Shen(China Construction Science&Technology Group Co.,Ltd.,Shenzhen 518118,China)

机构地区：[1]中建科技集团有限公司,广东深圳518118

出　　处：《钢结构(中英文)》2024年第12期74-85,共12页Steel Construction(Chinese & English)

基　　金：中国建筑股份有限公司科技创新平台项目(CSCEC-PT-005);中建科技集团有限公司科技研发计划项目(ZJKJ-2021-2)

摘　　要：装配式钢与混凝土组合结构是一种具有广阔应用前景的装配式结构类型,而预制混凝土柱-钢梁连接节点中有一类为半刚性连接节点,半刚性连接节点的转动刚度和抗震性能与连接节点的构造有密切关系。为研究预制混凝土柱-钢梁干式连接节点的抗震性能和转动刚度,设计了1个预制混凝土柱-钢梁半刚性连接节点足尺构件开展拟静力加载试验,分析了该梁柱连接节点中钢节点模块、节点核心区箍筋、预制柱纵筋等的屈服特点,以及连接节点的承载力、滞回性能和破坏机理等抗震性能指标和转动刚度。采用ABAQUS有限元软件对连接节点中的关键组件进行了模拟分析,采用混凝土损伤塑性模型来模拟混凝土破坏过程,混凝土的单轴压缩和拉伸本构模型采用GB/T 50010—2010《混凝土结构设计标准》中提供的模型,钢筋本构采用清华大学开发的ABAQUS用户自定义材料子程序集PQ-Fiber中钢筋的单轴弹塑性滞回本构模型(USteel02)。关键组件包括钢节点模块侧板厚度、拉杆直径、牛腿加劲肋厚度、牛腿竖端板厚度、牛腿水平连接板厚度、连接高强螺栓直径。研究表明:连接节点破坏形态为梁铰机制破坏,楼板混凝土压溃,钢节点模块侧板及内部拉杆屈服;钢节点模块的存在保证了梁柱节点域的刚度和承载力,能够满足抗震设计中“强节点”的要求;连接节点发生明显损伤时的层间位移角大于2%,且承载力仍未下降,在层间位移角大于2.75%时,钢节点模块中侧板受拉外鼓,对应处拉杆屈服,钢牛腿未发现明显损坏,焊缝未断裂;节点试件的滞回曲线呈纺锤形,骨架曲线经历较长的强化区段,且承载力下降缓慢,梁端弯矩-转角曲线表明节点具有半刚性节点特征,且正反向转动刚度不一致,反向转动刚度比正向转动刚度大6倍;对连接节点转动刚度影响较大的组件有钢节点模块侧板厚度、拉杆直径�The prefabricated steel-concrete composite structure is a type of prefabricated structure with broad application prospect,there is a kind of semi-rigid joint among the joints of prefabricated concrete columns and steel beams,and the rotational stiffness and seismic performance of the semi-rigid joint are closely related to the structure of the joint.In order to study the seismic performance and rotational stiffness of the dry connection joint between the precast concrete column and the steel beam,a full-scale component with a semi-rigid connection joint beween the precast concrete column and steel beam was designed and subjected to quasi-static loading tests.The yield characteristics of the steel joint module,the joint core area reinforcing steel,and the longitudinal rebars of the precast column were analyzed in the connection joint,as well as the bearing capacity,hysteretic behavior,and failure mechanism of the connection joint’s seismic performance indicators and rotational stiffness.The key components in the connection joint were simulated by using the ABAQUS finite element software,and the concrete damage plastic model was used to simulate the concrete failure process.The uniaxial compression and tension constitutive models of concrete were adopted from the model provided in the Code for Design of Concrete Structures(GB/T 50010—2010),and the constitutive model of steel rebars was adopted from the ABAQUS user-defined material subroutine package PQ-Fiber developed by Tsinghua University,which used the uniaxial elastic-plastic hysteretic constitutive model of steel rebars(USteel02).The key components include the thickness of the side plates of steel joints module,the diameter of the tie rods,the thickness of the stiffeners on the corbels,the thickness of the vertical plate on the corbels,the thickness of the horizontal plate on the corbels,and the diameter of the high-strength bolts for connection.The research showed that the failure modes of the connection joint were beam hinge mechanism failure,concrete cr

关 键 词：装配式钢-混混合结构 组合梁柱连接节点 梁柱半刚性连接 钢节点模块 转动刚度 

分 类 号：TU352.11[建筑科学—结构工程] TU756.4