半组装式碟簧自复位防屈曲支撑的滞回性能研究

发布时间：2024-05-22 22:34

　　设计合理的防屈曲支撑(BRB)具有良好的延性与耗能能力,但大幅轴向屈服后残余变形较大。因此,本文设计了一种新型的组装式碟簧自复位防屈曲支撑,并通过拟静力试验与数值模拟探索了其抗震性能。主要研究内容如下:(1)提出一种新型自复位防屈曲支撑(SCBRB)构造。给出了SCBRB的详细构造,并分析了受力特性。据此设计了SCBRB试件。SCBRB支撑的复位力由受压碟簧组合提供,耗能能力由BRB提供。BRB由中心的钢板支撑、薄壁圆钢管内填砂浆做外围约束构件和二者间的无粘结材料组成。(2)对一个自复位支撑(SC)、一个防屈曲支撑(BRB)、两个SCBRB进行了拟静力试验。试验表明,与BRB相比,SCBRB呈现出旗帜型滞回曲线,残余变形显著减小。SC的滞回曲线也呈旗帜型,轴压下碟簧组合间耗能能力较小。因构造上,无论SC还是BRB,都带有上下部推拉块(下部推拉块的钢管插入上部推拉块的钢管中)。水平往复加载下,支撑上下部推拉块间具有一定的相互作用使其具有一定的抗侧承载力和耗能能力。因此,水平加载时,SC试件具有一定的耗能能力,且BRB在钢板内芯断裂后随着加载位移增长其仍有一定的承载力。(3)采用ABAQU...

【文章页数】：153 页

【学位级别】：硕士

【文章目录】：
摘要
Abstract
Chapter1 Introduction
    1.1 Background
    1.2 Buckling Restrained Brace
    1.3 Self-Centering Energy Dissipation Brace
        1.3.1 Self-centering friction energy dissipation brace
        1.3.2 Self-centering buckling restrained brace
    1.4 Summary of self-centering system researches
    1.5 The source and main research contents
Chapter2 Design of Self-Centering Buckling Restrained Brace
    2.1 Overview
    2.2 Structural and mechanical properties of self-centering buckling restrained brace
        2.2.1 Structural and mechanical properties of the self-centering system
            2.2.1.1 Configuration of the self-centering system
            2.2.1.2 Disc spring combination
            2.2.1.3 Stress characteristic of the self-centering system
        2.2.2 Structural and mechanical properties of buckling restrained brace
            2.2.2.1 Configuration of buckling restrained brace
            2.2.2.2 Size of specimen inner core
            2.2.2.3 Force characteristics of buckling restrained brace
            2.2.2.4 Stiffness of the buckling restrained brace’s core
        2.2.3 Structural and mechanical properties of self-centering buckling restrained brace
            2.2.3.1 Configuration of self-centering buckling restrained brace
            2.2.3.2 Design of self-centering buckling restrained brace based on maximum loading capacity
            2.2.3.3 Design of self-centering ratio
            2.2.3.4 Design of pre-compression force of the self-centering system
            2.2.3.5 Design of axial displacement and bearing capacity of buckling restrained brace
    2.3 Design and prefabrication of specimens
        2.3.1 Design and prefabrication of self-centering system
            2.3.1.1 Design and prefabrication of compression disc spring system
            2.3.1.2 Design and prefabrication of lower and upper push-pull blocks
        2.3.2 Design and prefabrication of buckling restrained brace
            2.3.2.1 Design of buckling restrained brace’s inner core
            2.3.2.2 Design of restrained member of buckling restrained brace
            2.3.2.3 Design of clearance
            2.3.2.4 Pre-casted buckling restrained brace
        2.3.3 Design and prefabrication of end connection system
        2.3.4 Configuration assessment
    2.4 Material properties
        2.4.1 Steel
        2.4.2 Mortar
    2.5 Summary
Chapter3 Experimental Study on the Hysteretic Behavior of Self-Centering Buckling Restrained Brace
    3.1 Overview
    3.2 Composition and number of specimens
    3.3 Test scheme
        3.3.1 Specimen assembly
            3.3.1.1 Compression disc spring system assembly
            3.3.1.2 Self-centering specimen assembly
            3.3.1.3 Self-centering buckling restrained brace assembly
            3.3.1.4 Buckling restrained brace specimen assembly
        3.3.2 Test rig set up
        3.3.3 Specimen installation
    3.4 Loading scheme and measurement
    3.5 Test loading
    3.6 Experimental phenomenon and analysis
    3.7 Analysis of test result
        3.7.1 Hysteretic curve of the specimen
        3.7.2 Separation of the respective buckling restrained brace from the self-centering buckling restrained brace specimen
        3.7.3 Skeleton curve
        3.7.4 Bearing capacity and ductility
        3.7.5 Self-centering ratio analysis
        3.7.6 Residual deformation analysis
        3.7.7 Cumulative energy dissipation analysis
        3.7.8 Test result
    3.8 Summary
Chapter4 Finite Element Analysis on Hysteretic Behavior of Self-Centering Buckling Restrained Brace
    4.1 Overview
    4.2 Component modeling
        4.2.1 Disc spring
        4.2.2 Gasket
        4.2.3 Compression block
        4.2.4 Lower push-pull block
        4.2.5 Upper push-pull block
        4.2.6 Threaded Studs and nuts
    4.3 Assembly and simulation of the self-centering system
        4.3.1 Assembly of the self-centering system
        4.3.2 Simulation of self-centering system under axial load
    4.4 Assembly and simulation of buckling restrained brace
        4.4.1 Assembly and modeling of buckling restrained brace
        4.4.2 Simulation of the buckling restrained brace under axial load
    4.5 Assembly and simulation of self-centering buckling restrained brace under axial load
        4.5.1 Assembly of self-centering buckling restrained brace
        4.5.2 Simulation of self-centering buckling restrained brace under axial load
    4.6 Verified simulation and analysis
        4.6.1 The push-pull blocks interaction
        4.6.2 The self-centering system simulation in45°position
    4.7 Summary
Conclusions
References
Appendix
Acknowledgement



本文编号：3980626