钢梁—混凝土剪力墙T型连接铰接节点抗拔性能研究

发布时间：2018-06-09 04:02

本文选题：混凝土剪力墙 + 钢梁　；参考：《清华大学》2013年硕士论文

【摘要】：随着经济建设的快速发展，钢－混凝土组合结构——这一适合我国国情的结构形式在各个领域得到广泛应用，特别是在超高层结构中，以钢框架—核心筒为代表的组合结构更是层出不穷。然而在国内，对于超高层建筑中关键性的钢梁—剪力墙节点研究却并不多，国外可供参考的节点类型也有限。特别是对结构整体抗震性能有重要影响的钢梁—剪力墙节点抗拔性能研究更是缺乏。在前人研究基础上，并结合实际工程实际，本文研发了新型钢梁—混凝土剪力墙T型铰接节点，并进行了抗拔性能研究。主要研究工作包括：（1）调研和总结了国内外组合结构应用现状，钢梁—混凝土剪力墙节点研究现状及方法，提出了本文研究的思路和技术路线；（2）以某实际工程为背景，对其中关键的梁柱节点与墙梁节点进行抗震性能试验研究，对其滞回性能、延性、耗能能力、变形恢复能力等进行探讨，并进行了有限元模拟及参数分析，对此类节点给出了设计建议；（3）设计了不同埋深、竖向配筋率、腹板栓钉个数及位置的六个钢梁—混凝土剪力墙T型铰接节点，进行抗拔性能试验研究。通过对试验现象的观察，给出了不同构件的破坏特征；通过对承载力、不同位置处节点板翼缘与腹板及竖向钢筋的应力分析，研究了影响抗拔承载力的重要因素，并基本掌握其传力机制，给出构造建议；（4）利用通用有限元软件MSC.MARC对试验构件进行建模分析，研究了剪力墙及节点区钢构件局部应力应变特性；对带栓钉进行变参数分析，研究了栓钉尺寸及位置对节点承载力的影响。（5）在试验研究的基础上，利用刚塑性假设和混凝土双剪破坏理论，对腹板无栓钉构件抗拔承载力进行理论推导，给出了简化计算公式，并与试验结果进行对比；对20个节点板腹板无栓钉构件进行有限元数值模拟，并将分析结果与公式计算结果对比；在此基础上利用弹性地基梁等理论给出了发生节点板腹板屈服破坏的相关条件；最后，，在总结全部成果的基础上提出了进一步研究的展望。
[Abstract]:With the rapid development of economic construction, the steel-concrete composite structure, which is suitable for China's national conditions, has been widely used in various fields, especially in super-high-rise structures. Steel frame-core tube as the representative of the composite structure is emerging in endlessly. However, in China, there are few researches on the key steel beam-shear wall joints in super high-rise buildings, and the types of connections available for reference abroad are also limited. Especially, the research on the pull-out performance of the steel beam-shear wall joints which have important influence on the seismic behavior of the whole structure is even less. On the basis of previous research and actual engineering practice, a new type of steel beam-concrete shear wall T-hinge joint is developed and its pull-out performance is studied. The main research work includes: 1) the present situation of application of composite structures at home and abroad, the present research status and methods of steel beam-concrete shear wall joints, the ideas and technical route of this paper are put forward. The key Liang Zhu joints and wall beam joints are tested for seismic performance. The hysteretic performance, ductility, energy dissipation capacity, deformation and recovery capacity are discussed, and finite element simulation and parameter analysis are carried out. The design suggestions for this kind of joints are given. (3) six T-type joints with different burying depth, vertical reinforcement ratio, number and position of web studs are designed, and the pull-out performance of T-joints is studied. Through the observation of the experimental phenomena, the failure characteristics of different members are given, and the important factors affecting the pull-out bearing capacity are studied through the stress analysis of the flange of the joint plate and the web plate and the vertical steel bar at different locations and bearing capacity. Finally, the author makes use of the general finite element software MSC.MARC to model and analyze the test members, studies the local stress-strain characteristics of shear walls and steel members in the joint area, and analyzes the variable parameters of the steel members with studs. The influence of pin size and location on the bearing capacity of joints is studied. On the basis of experimental study, the pull-out capacity of web unbolted members is derived by using rigid-plastic hypothesis and concrete double shear failure theory. The simplified calculation formula is given and compared with the experimental results, and the finite element numerical simulation of 20 node plate web members is carried out, and the analysis results are compared with the formula results. On the basis of this, using the theory of elastic foundation beam and so on, the related conditions for the yield failure of the web of the joint plate are given, and finally, the prospect of further research is put forward on the basis of summing up all the results.
【学位授予单位】：清华大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU398.9

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