梁柱部分无粘结螺杆连接装配式节点的受力机理分析研究  

Analysis and research on the performance mechanism of beam-to-column assembled joint connected with partially unbounded steel bar

作　　者：程卫红 肖从真 田春雨 陆宜倩 Cheng Wei-hong;Xiao Cong-zhen;Tian Chun-yu;Lu Yi-qian(China Academy of Building Research,Beijing 100013,China)

机构地区：[1]中国建筑科学研究院有限公司,北京100013

出　　处：《工程抗震与加固改造》2022年第2期1-10,共10页Earthquake Resistant Engineering and Retrofitting

基　　金：国家重点研发计划资助项目(2016YFC0701500);住房和城乡建设部科学技术项目(2018-K9-080)。

摘　　要：针对一种梁柱部分无粘结螺杆连接装配式节点,对其受力机理进行理论分析,与相关试验进行对比验证;并开展有限元模拟分析,研究不同节点构造对节点受力性能的影响。研究表明:该节点的主要屈服机制为连接螺杆,可实现预制梁柱构件基本弹性;节点屈服后,卸载和再加载过程中有明显的转角变形滑移,节点耗能能力较弱;理论推导的节点弯矩-转角曲线与试验结果、有限元模拟结果均吻合良好;节点构造设计时,减小牛腿支承长度可实现正负转动方向对称的工作性能,控制螺杆截面和强度有助于保证装配式节点的变形延性性能。Theoretical analysis of the force mechanism of a concrete beam-to-column assembled joint connected with partially unbounded steel bar is carried out. Further simulation is carried out to research the influence of different joint structures on the performance of the joint. The research shows that the main yield component of the joint is the connecting bar, while the prefabricated beam and column members remain basically elastic. Obvious rotation deformation slip occurred during the unloading and reloading process after the joint yield, therefore the joint energy dissipation capacity is weak. Theoretically deduced moment-angle curve of the joint are basically consistent with test values and finite element simulation values. Reducing the support length of the corbel can achieve symmetrical performance of the joint in positive and negative rotation directions. The cross-section and strength of the unbounded bar should be limited to ensure the deformation ductility performance of joint.

关 键 词：部分无粘结 装配式连接节点 受力机理 有限元模拟 弯矩-转角关系 节点构造 

分 类 号：TU375[建筑科学—结构工程] TU312