转角位移型阻尼器性能研究及工程应用  

Performance Study of Rotational-based Metallic Damper and Engineering Application in a Complex Power Plant Structure

作　　者：蒲瑞 李倩倩[3] 王健泽 徐军 戴靠山 PU Rui;LI Qianqian;WANG Jianze;XU Jun;DAI Kaoshan(College of Architecture&Environment,Sichuan Univ.,Chengdu 610065,China;Sichuan Inst.of Building Research,Chengdu 610081,China;Inst.for Disaster Management and Reconstruction,Sichuan Univ.-The Hong Kong Polytechnic Univ.,Chengdu 610065,China;School of Architecture and Civil Eng.,Xihua Univ.,Chengdu 610039,China)

机构地区：[1]四川大学建筑与环境学院,四川成都610065 [2]四川省建筑科学研究院有限公司,四川成都610081 [3]四川大学-香港理工大学灾后重建与管理学院,四川成都610065 [4]西华大学建筑与土木工程学院,四川成都610039

出　　处：《工程科学与技术》2024年第2期162-171,共10页Advanced Engineering Sciences

基　　金：国家自然科学基金项目(52278512);科技部重点研发计划项目(2022YFE0113600);四川省自然科学基金项目(2022NSFSC0988)。

摘　　要：针对传统加固方案美观性不足、空间占有率大的缺点,本文提出一种应用于梁–柱节点的转角位移型金属阻尼器(RMD),该阻尼器外观为弧线型,布置点位于结构梁柱节点处,在保证耗能效果的同时,可最大程度满足建筑功能需求。RMD的耗能原理是梁–柱夹角变化推动阻尼器内部剪切钢板产生位移,耗能棒与剪切钢板相连,多根双曲线型金属棒在剪切板的带动下同时发生弯曲变形,进而耗散地震输入的能量。经有限元数值分析和力学试验研究发现,RMD拥有良好的耗能能力和塑性变形能力,即使在大变形下也不容易发生破坏,并且通过改变耗能棒的数量可以直接调节阻尼器的性能参数,满足不同的工程需求。由于现有常用工程设计软件中没有相应的转动型连接单元对RMD进行模拟,为方便工程设计,进一步提出一种直线型布置的等效模型,基于阻尼器变形前后位移等效原理,通过理论公式推导了等效模型物理参数计算方法,并使用有限元分析证实了该方法拥有较高的准确性。为评估该阻尼器的耗能效果,在相同的数量和布置形式下,将其与普通钢隅撑、黏弹性转角阻尼器分别设置在某一复杂电厂结构中进行减震设计分析。计算结果表明,RMD能够有效降低结构的地震响应,且减震效果优于隅撑与黏弹性转角阻尼器。In response to the limitations of traditional strengthening solutions,such as the lack of aesthetics and significant spatial occupancy,this study proposes a new rotational-based metallic damper(RMD)designed for beam-column joints.The RMD features an arc-shaped appearance,and its placement is strategically set at the corners of beam-column frames,meeting functional building requirements while ensuring effective en-ergy dissipation.The fundamental principle of energy dissipation relies on inducing displacement in a shear plate inside the damper when there is a change in the beam-column angle.Subsequently,hyperbolic-shaped steel bars(HSBs),connected to the shear plate,undergo flexural deforma-tion with the motion of shear plates to dissipate seismic energy.Through finite element(FE)numerical analysis and mechanical performance test-ing,the RMD demonstrates excellent energy dissipation and plastic deformation capabilities,with minimal risk of failure even under large de-formations.By adjusting the number of HSBs,various engineering requirements and objectives can be satisfied.However,existing commonly used engineering design software lacks a rotational link element to simulate the RMD.To address this,we propose an equivalent model to facilit-ate engineering design.The approach for determining physical properties of the equivalent model is derived and validated using the FE analysis method.To evaluate the energy dissipation and seismic mitigation performance of the damper,comparisons are made with ordinary knee braces and viscous-elastic dampers in a design analysis of a specific power plant structure based on the same quantity and arrangement form.Our calcu-lations demonstrate that the newly proposed damper effectively reduces the seismic response of the structure and exhibits a better damping effect compared to conventional techniques.

关 键 词：转角位移型阻尼器 消能减震 等效力学模型 电厂结构 地震响应 

分 类 号：TU271.1[建筑科学—建筑设计及理论]