摘要
提出了一种全装配式混凝土减震框架结构,该框架结构采用直螺纹套筒连接,并采用黏滞阻尼器提升整体抗震性能。为研究所提出的全装配式混凝土减震框架结构的抗震性能,对1个单榀装配式减震框架试件和1个单榀装配式框架试件开展拟动力实验,对其破坏模式、塑性铰、滞回性能、刚度退化、延性和耗能能力进行研究。结果表明,装配式减震框架和装配式框架均发生弯剪破坏,破坏集中在接近柱中连接部位;与无阻尼器装配式框架相比,带黏滞阻尼器的装配式减震框架的正负向的极限承载力分别提高了97%和82%;耗能能力和刚度也显著提高。结合框架受力状态来看,装配式框架柱中部为纯受剪状态,抗剪性能需求高,易发生脆性破坏。因此,建议加强柱中连接节点处的抗剪性能,提高施工质量,确保连接部位的咬合力。
A fully precast concrete energy-dissipation frame structure is proposed.It adopts straight threaded sleeve connections and employs viscous dampers to enhance its overall seismic performance.To investigate the seismic performance of the proposed precast concrete energy-dissipation frame structure,pseudo-dynamic tests were carried out on a precast concrete energy-dissipation frame specimen and a precast frame specimen.The research focused on the failure modes,plastic hinge development,hysteretic behaviors,stiffness degradation,ductility,and energy dissipation capacities of the frame specimens.The results indicate that both the precast frame specimens with and without viscous dampers experienced flexural-shear failure,with the damage concentrated near the mid-height of the column joint.Compared with the precast frame without a damper,the precast energy-dissipation framework exhibited a 97%increase in positive ultimate bearing capacity and an 82%increase in negative ultimate bearing capacity.The energy dissipation capacity and stiffness were also significantly improved.Considering the stress state of the framework,the precast framework columns are in a pure shear state at mid-height,which requires high shear resistance and is prone to brittle failure.Therefore,it is recommended to strengthen the shear resistance of the mid-height connection joints,improve the construction quality,and ensure the gripping force of the connection parts.
作者
计嘉伟
何文福
尚自端
王琨
杨森
JI Jiawei;HE Wenfu;SHANG Ziduan;WANG Kun;YANG Sen(Shanghai Nuclear Engineering Research&Design Institute Co.,Ltd.,Shanghai 200233,China;School of Mechanics and Engineering Science,Shanghai University,Shanghai 200444,China)
出处
《地震工程与工程振动》
北大核心
2025年第4期191-199,共9页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金面上项目(52078287,52378521)
国家自然科学基金青年项目(52408548)。
关键词
装配式混凝土减震框架
抗震性能
动力试验
黏滞阻尼器
直螺纹套筒
precast concrete energy-dissipation frame
seismic performance
dynamic test
viscous damper
straight threaded sleeve
