新型装配式剪力墙水平连接装置的力学性能  

Mechanical behavior of a new horizontal connection device for fabricated shear wall

作　　者：熊二刚[1] 郭帆 张萌 徐涵 樊禹江[1] XIONG Ergang;GUO Fan;ZHANG Meng;XU Han;FAN Yujiang(School of Civil Engineering,Chang’an University,Xi’an 710061,China)

机构地区：[1]长安大学建筑工程学院,西安710061

出　　处：《哈尔滨工业大学学报》2022年第11期112-121,150,共11页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金青年项目(51808046);陕西省重点研发计划(2021SF-461)。

摘　　要：装配式剪力墙结构连接节点/水平接缝的力学性能对装配式结构起着至关重要的作用,为了提高装配式剪力墙结构的抗震性能,本文结合消能减震技术设计研发了一种新型装配式剪力墙水平连接装置。通过该设计,制作了2种不同螺栓数量的水平连接装置,并对其进行了不同正弦加载频率下的动态力学性能试验,探究了不同螺栓预紧力、加载频率及螺栓数量对装置力学性能的影响规律;探究了装置摩擦升温对其力学性能的影响规律。结果表明:该装置在保证结构可靠连接的同时,又能依靠装置的内部摩擦消耗大量地震能量,从而有效减小结构地震响应,保护主体结构。此外,螺栓预紧力与装置的耗能能力和割线刚度基本呈线性关系,但对等效阻尼比影响不大;水平连接装置的力学性能几乎不受加载频率的影响;增加螺栓数量可大幅提高装置耗能能力;螺栓预紧力与加载频率均是装置温度升高的重要影响因素,但装置温度变化对其力学性能影响不大。The mechanical properties of the connection joints/horizontal joints of the fabricated shear wall structure play a vital role in the fabricated structure.To improve the seismic performance of the fabricated shear wall structure,we designed and developed a new type of horizontal connection device based on the energy dissipation technology.Through the design,two kinds of horizontal connection devices with different numbers of bolts were prepared.The dynamic mechanical properties of the devices under different sinusoidal loading frequencies were tested,and the influences of bolt preload,loading frequency,and bolt number on the mechanical properties of the device were explored.The influence of temperature rise caused by friction on the mechanical properties of the device was investigated.Results show that the device could ensure the reliable connection of the structure and meanwhile consume much seismic energy due to the internal friction,so as to effectively reduce the seismic response of the structure and protect the main structure.In addition,the bolt preload linearly correlated with the energy dissipation capacity and secant stiffness of the device,but had little effect on the equivalent damping ratio.The mechanical properties of the horizontal connection device were hardly affected by the loading frequency.Increasing the number of bolts could greatly improve the energy consumption capacity of the device.Bolt preload and loading frequency were important factors for the temperature rise in the device,but the temperature change in the device had little effect on its mechanical properties.

关 键 词：装配式剪力墙 水平连接装置 摩擦耗能器 螺栓预紧力 加载频率 

分 类 号：TU375[建筑科学—结构工程]