装配式钢质塑性可控铰抗震性能试验研究  

Experimental study on seismic performance of plastic controllable prefabricated steel hinges

作　　者：颜桂云[1] 袁宇琴 郑莲琼[1] 肖晓菲[1,2] 马永超 YAN Guiyun;YUAN Yuqin;ZHENG Lianqiong;XIAO Xiaofei;MA Yongchao(Fujian Provincial Key laboratory of Advanced Technology and Information in Civil Engineering,Fujian University of Technology,Fuzhou 350118,China;College of Civil Engineering,Fuzhou University,Fuzhou 350116,China)

机构地区：[1]福建工程学院,福建省土木工程新技术与信息化重点实验室,福建福州350118 [2]福州大学土木工程学院,福建福州350116

出　　处：《建筑结构学报》2022年第1期86-94,共9页Journal of Building Structures

基　　金：国家自然科学基金面上项目(51878174);福建省自然科学基金面上项目(2019J01778);福州市科技计划(2018-G-31)。

摘　　要：装配式混凝土结构节点及其连接是抗震薄弱环节,有必要发展高性能的节点及其连接形式,为此,提出一种装配式塑性可控、可更换部件的钢质塑性可控铰连接节点,并对该节点关键耗能部件——钢质塑性可控铰进行低周往复荷载试验,考察其弯矩-转角滞回曲线、骨架曲线、承载能力、转动刚度、破坏模式、延性、能量耗散能力等抗震性能,研究翼缘核心板开孔削弱对钢质塑性可控铰抗震性能的影响。结果表明:椭圆形开孔削弱与菱形开孔削弱两种构造形式的钢质塑性可控铰滞回曲线饱满,能量耗散量大,延性良好,承载力退化不明显;塑性变形从翼缘核心板最大削弱截面处开始往开孔两端发展,最终在最大削弱截面处开裂或断裂,实现了塑性性能、破坏模式可控。与菱形开孔削弱的钢质塑性可控铰相比,椭圆形开孔削弱钢质塑性可控铰的延性、累积滞回耗能、承载力退化性能及转动能力等更好,但其初始弹性转动刚度相对较小。The joints and connections of prefabricated concrete structures are weak links in an earthquake when compared with those of cast-in-place structures.It is necessary to develop innovative forms of joints and connection with high performance.To this end,a novel-type prefabricated joint with plastic controllable and replaceable steel hinges was proposed,in which the steel hinges were the key energy-dissipating component of the prefabricated joint.The low-cycle reversed loading test on the plastic controllable steel hinges was carried out to explore the moment-rotation hysteretic curve,skeleton curve,bearing capacity,rotational stiffness,failure mode,ductility and energy dissipation capacity.In addition,the influence of weakening by hole section of the flange core plate on the seismic performance of steel hinges was investigated.The results show that the hysterestic curves of the steel hinges in which the flange core plates are weakened by elliptical hole or by diamond-shaped hole are full.Both the steel hinges have large energy dissipation,good ductility and insignificant bearing capacity degradation.Plastic deformation starts from the most weakened section of the flange core plate and develops to the two ends of the opening.The flange core plate finally cracks or fractures at the most weakened section,achieving the controllability of plasticity and failure modes.All these ductility,cumulative hysteretic energy dissipation,bearing capacity degradation performance,and rotation ability of the elliptical-hole weakened steel hinge are better than those of the diamond-shaped-hole weakened steel hinge,but the initial rotational stiffness of the former is less than that of the latter.

关 键 词：装配式节点 钢质塑性可控铰 开孔削弱 可更换部件 低周往复荷载试验 抗震性能 

分 类 号：TU352.1[建筑科学—结构工程] TU317.1