【作者】 王春艳；

【导师】 刘建明；

【作者基本信息】 燕山大学 ， 土木工程， 2021， 硕士

【摘要】 本文基于可恢复功能防震理念,提出了一种碟簧弹性复位装置并将其应用在自复位钢框架节点中,得到了一种新型碟簧自复位钢框架节点,U形阻尼器和连接钢板作为耗能构件,碟簧复位装置作为自复位构件,节点具有良好的耗能能力和自复位能力,为多层框架结构的抗震研究提供了新的思路。本文主要研究内容如下:(1)依据新型节点设计原则提出了一种新型碟簧自复位钢框架节点,该节点在地震力作用下,具有良好的耗能能力和自复位能力。本文详细阐述了新型节点的构造形式、工作机理、各构件具体参数设计和节点恢复力模型等。(2)提出了一种位于节点处的碟簧复位装置,用以实现节点的自复位。详细阐述了其构造形式、构件具体参数、地震作用下工作机理,推导了碟簧复位装置的恢复力模型,并利用ABAQUS软件对碟簧复位装置进行了有限元建模和计算结果分析,结果表明,碟簧复位装置在加载位移作用下,没有残余变形,自恢复性能优越,且有一定的耗能能力。(3)对新型自复位节点与传统钢框架节点进行了有限元模拟分析,在施加相同梁端位移的情况下,得到了两节点的滞回曲线、残余变形曲线、骨架曲线、刚度退化曲线和耗能系数曲线,以此对比分析两节点的抗震性能。结果表明,新型节点与传统节点相比,刚度和承载力较大,震后残余变形小,自恢复性能好,但耗能能力不如传统节点。(4)对新型自复位节点抗震性能的影响因素进行了分析。从碟簧复位装置预压力、碟簧刚度、碟簧复位装置间距、阻尼器U形段厚度四个因素出发,设计了八个不同节点并对其进行有限元分析计算,得到了各节点的滞回曲线、残余变形曲线、骨架曲线、耗能系数曲线,同时对各曲线进行了对比分析。结果表明,四个影响因素的参数增大都会适当提高自复位节点的刚度和承载力,减小节点的残余变形,提高节点的自复位能力,但耗能能力会有所降低。更多还原

【Abstract】 Based on the concept of earthquake resistance with recoverable function,this paper proposes a new type of Spring reduction device and applies it to the self reset steel frame node,and the u-damper and connecting steel plate are used as energy dissipation members,and the disc spring reset device is used as self resetting component to reduce the residual structure.The residual deformation and the good energy dissipation and self reset ability of the joints provide a new way for seismic research of multi-layer frame structure.The main contents of this paper are as follows:(1)According to the new joint design principle,a new type of disc spring self reset steel frame joint is proposed.Under the action of earthquake force,the joint has good energy dissipation capacity and self reset capacity.In this paper,the structural form,working mechanism,parameter design and restoring force model of the new joint are described in detail.(2)A disk spring reset device is proposed to realize the self reset of the node.The structure form,the specific parameters of the components and the working mechanism under earthquake action are described in detail.The recovery force model of the disc spring reset device is deduced.The finite element model and calculation results analysis of the disc spring reset device are carried out by ABAQUS software.The results show that the disc spring reset device has no residual deformation,excellent self recovery performance and certain energy consumption under the action of loading displacement Ability.(3)The finite element simulation analysis of the new self reset joint and the traditional steel frame joint is carried out.Under the same displacement of the beam end,the hysteretic curve,residual deformation curve,skeleton curve,stiffness degradation curve and energy consumption coefficient curve of the two nodes are obtained.The seismic performance of the two joints is compared and analyzed.The results show that the new type of node has greater stiffness and bearing capacity,less residual deformation and better self recovery performance than traditional nodes,but the energy consumption capacity is not as good as that of traditional nodes.(4)The factors influencing the seismic performance of the new self reset joint are analyzed.Based on the four factors,such as pre-pressure,stiffness,spacing and thickness of U-section of damper,eight different nodes are designed and calculated by finite element method.The hysteresis curve,residual deformation curve,skeleton curve and energy consumption coefficient curve of each node are obtained.At the same time,the curves are compared and analyzed.The results show that the stiffness and bearing capacity of the self reset nodes are properly improved,the residual deformation of the nodes is reduced,and the self reset ability of the nodes is improved,but the energy consumption capacity will be reduced.更多还原