考虑阶段耗能的预制混凝土楼板拼缝节点面内受力性能试验研究  

Experimental Research on In-Plane Mechanical Characteristics of Precast Concrete Diaphragm Connections with Two-Stage Energy Dissipation

作　　者：罗维刚[1,2,3] 宋江朋 祁盼 司航槟 刘凯 李兰舟[3] 赵星鑫 LUO Weigang;SONG Jiangpeng;QI Pan;SI Hangbin;LIU Kai;LI Lanzhou;ZHAO Xingxin(Western Center of Disaster Mitigation in Civil Engineering,Ministry of Education,Lanzhou 730050,China;Gansu Key Laboratory of Civil Engineering Disaster Prevention and Mitigation,Lanzhou 730050,China;College of Civil Engineering,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]西部土木工程防灾减灾教育部工程研究中心,兰州730050 [2]甘肃省土木工程防灾减灾重点实验室,兰州730050 [3]兰州理工大学土木工程学院,兰州730050

出　　处：《工业建筑》2022年第12期80-87,215,共9页Industrial Construction

基　　金：甘肃省建设科技攻关项目(JK013-18)。

摘　　要：为提高预制混凝土楼板结构在不同水平地震动作用下的楼板抗震性能基于性能抗震设计理念提出了一种用于预制混凝土楼板拼缝连接的新型干式节点具有摩擦和金属耗能相结合的双重耗能行为特点可实现基于两阶段耗能的多层次抗震性能水准需求简称摩擦金属双重耗能阻尼器(FMD)节点。为了研究FMD节点的不同受力状态下的力学性能进行了6个装配有FMD节点的预制楼板纯剪切和拉剪耦合作用下的拟静力试验。试验结果表明新:型干式拼缝节点具有稳定的滞回响应和耗能能力,表现出了摩擦和金属两种不同耗能类型协同工作机制,可以实现多水准设防目标,震后可更换实现结构功能快速恢复。In order to improve the seismic performance of precast concrete floor structures in different seismic intensity, based on the concept of performance-based seismic design, a new type of dry connectors which could be used for the connections of precast concrete diaphragms in site was proposed. It showed the characteristics of dual energy dissipation properties of friction and metals, and could meet the multi-level seismic performance requirements based on two-stage energy dissipation, referred to as friction-metal damper(FMD) connectors. In order to study the mechanical properties of FMD connectors in different stress states, six quasi-static tests of precast floor slabs equipped with FMD connectors under pure shear and tension-shear coupling force were conducted. The test results showed that the new type of dry connectors had stable hysteretic characteristics and energy dissipation capacity, showing a cooperative working mechanism of friction and metals, which could realize the objectives of multi-level seismic fortification, and could meet the requirements for fast recovery of structural functions after earthquakes.

关 键 词：预制混凝土楼板拼缝节点 双重耗能机理 摩擦耗能 拟静力试验 

分 类 号：TU37[建筑科学—结构工程]