【作者】 薛睿；

【导师】 李立仁；

【作者基本信息】 重庆大学 ， 结构工程， 2008， 硕士

【摘要】 型钢高强混凝土结构不仅具有承载力高、刚度大、抗震性能好、延性好、防火性能高的普通型钢混凝土结构的优点,而且可以有效地减小构件的截面,增大使用空间,减小结构自重,增加房屋高度和增大跨度,提高单位面积的承载力和经济效益。这一系列优点都将促使高强高性能混凝土在型钢混凝土结构中的大量应用。国内外大量的震害表明:框架节点是框架传力的枢纽,是保证结构承载力和刚度的重要部位,是建筑结构抗震中的一个关键部位,节点破坏往往是导致整个框架破坏的关键原因之一,因而对节点的研究在国内外引起了广泛重视。随着型钢混凝土结构体系的发展和应用,有关其节点性能的研究也越来越广泛。由于节点受力及构造复杂,加之高强混凝土本身的脆性等,使得型钢高强高性能混凝土框架节点的理论研究滞后于实际工程应用,目前国内外关于其抗震性能的研究还很少。本文通过两个按照“强构件,弱节点”进行设计,混凝土强度为分别为76.0MPa与77.1MPa的型钢高强混凝土中节点试件的低周反复加载试验,分析了型钢高强混凝土框架节点的受力特点,得到型钢高强混凝土节点在不同轴压比下的破坏形态、滞回曲线、骨架曲线、延性系数、耗能指标、强度衰减规律和粘结应力的退化等,并在此基础上探讨了轴压比对节点抗震性能的影响;最后由试验结果,给出今后型钢高强混凝土节点抗震研究的建议。研究成果为型钢高强高性能混凝土结构的弹塑性地震反应分析提供了前提条件,并为合理建立型钢高强高性能混凝土节点的计算理论和设计方法提供理论依据,将促进这种优越的抗震结构体系的推广和应用。更多还原

【Abstract】 Steel reinforced high-strength concrete structure not only has the advantages of steel reinforced concrete structure such as high load-bearing capacity, high rigidity, good seismic behavior, good ductility and high fire-proof performance, but also can reduce the section of the members effectively, enlarge the available space, lighten the weight of the structure, increase the height and span of the building, and improve the unit load-bearing capacity and economic interest. These merits make the application of high-strength good-performance concrete more popular in steel reinforced concrete structure. It’s illustrated from many earthquake disasters that frame joint is the pivot of load transfer in frames, the important position to ensure the load-bearing capacity and rigidity in structures, and the key spot in seismic buildings. The failure of the joint usually is the main reason that causes the damage of the whole frame. Therefore, widespread attention has been caught on the research of joint both at home and abroad. With the development and application of steel reinforced concrete structure, research on the performance of the joint becomes more and more popular. Due to the complicated load-bearing and constructional detail of the joint and the brittleness of high-strength concrete, the theoretical research of steel reinforced high-strength concrete frame joint falls behind the practical application, and there are still few researches on its seismic behavior at home and abroad in the present.Failure patterns, hysteretic curves, skeleton curves, ductile coefficients, energy dissipation, strength degeneration, and bonding stress degradation of steel reinforced high-strength concrete joint are obtained by conducting tests of 2 steel reinforced high-strength concrete beam-to-column interior joint designed by the principle of strong-members and weak-joint with concrete strength being 76.0MPa and 77.1MPa under low cyclic reversed loading. Also the load-bearing characteristic of steel reinforced high-strength concrete frame joint is analyzed. Based on these, this paper discusses the effect of axial compression ratio on the seismic performance of the joint. In the end, suggestion on the seismic research of the steel reinforced high-strength concrete joint is provided from the result of the tests.The research findings provide premise conditions for the elastic-plastic earthquake response analysis of steel reinforced high-strength concrete structure, and give theoretical evidence to properly establish the computing theory and design method of steel reinforced high-strength concrete joint, which is about to promote the popularization and application of the super seismic structure system.更多还原