预制装配式RCS混合结构节点抗震性能试验研究

发布时间：2018-06-19 23:01

本文选题：预制装配式结构 + RCS混合结构　；参考：《江苏科技大学》2014年硕士论文

【摘要】：混凝土柱-钢梁混合结构（reinforcedconcretecolumn-steelbeam，RCS）充分发挥了钢与混凝土两种材料各自的优点，是一种可持续发展的结构体系，其综合性能要优于传统钢筋混凝土框架结构和钢框架结构，被称为“低成本高效率”的结构形式。将这种体系应用到预制装配式当中，发展装配式混合结构体系，这对于改变我国粗放型建筑施工作业，顺应建筑产业化发展趋势，无疑具有重要的经济和社会意义。为充分发挥混合结构（RCS）体系的优点，本文结合削弱外伸节点的特点和耗能减震技术的研究，提出了3种不同的干作业螺栓连接方式混合节点。为了研究全装配式RCS混合结构节点的抗震性能，根据提出的3种不同的干作业螺栓连接混合节点，通过拟静力试验，分别对节点构件的破坏特征、破坏机理以及承载能力、延性和耗能能力等抗震性能进行了试验研究。研究结果表明：（1）结合钢结构削弱外伸梁端节点的理念，将塑性铰的位置从梁端外移到削弱处，能避免塑性铰对核心区的不利影响，实现强柱弱梁的抗震设计要求；（2）采用单盖板连接的钢梁拼接节点，其耗能性能不如双盖板连接的钢梁拼接节点；（3）采用无箍筋的钢构套构造，节点核心区具有较高的承载能力和良好的耗能性能；（4）盖板拼接节点的滞回曲线呈Z字型，反映出存在较大滑移的影响；（5）外伸端板的半刚性连接节点，其滞回曲线呈纺锤形，端板屈曲能较好地耗散能量，具有良好的抗震性能；（6）盖板内侧设置摩擦铜片后，能起到很好的耗能效果；通过合理设计，震后破损的构件还可能实现修复和替换功能。在试验研究基础上，结合试验的破坏特征，使用非线性连接单元，建立用于框架结构分析的耗能拼接节点的弯矩—转角模型，对该RCS混合结构耗能节点进行数值模拟。通过对比可以发现，数值模拟曲线和试验曲线基本一致，因此，可以利用该连接单元模拟实际的摩擦耗能拼接节点。为了研究全装配式RCS混合结构节点耗能对框架结构整体抗震性能影响，利用SAP2000建立普通框架结构和带摩擦耗能节点的框架结构，进行了模态分析，用位移控制法在两种加载模式下进行静力弹塑性推覆分析，研究表明：连接的刚度会影响结构的低阶自振周期，但是对高阶模态影响很小；采用耗能节点的全装配式RCS混合结构能够有效减少底部受力，，表现出较好的延性；结构的层位移角都符合抗震规范的要求。
[Abstract]:Concrete column-steel beam composite structure (RCSs) gives full play to the advantages of both steel and concrete materials, and is a kind of structure system of sustainable development. Its comprehensive performance is better than that of traditional reinforced concrete frame structure and steel frame structure. It is called "low cost and high efficiency" structure form. It is of great economic and social significance to apply this system to the prefabricated assembly and develop the prefabricated hybrid structure system, which is of great economic and social significance for changing the extensive construction work and conforming to the development trend of building industrialization. In order to give full play to the advantages of hybrid structure (RCSs) system, combined with the characteristics of weakening outstretched joints and the study of energy dissipation technology, three different types of dry-working bolted joints are proposed. In order to study the seismic behavior of fully assembled RCS hybrid structure joints, according to the three kinds of different dry working bolted joints, the failure characteristics, failure mechanism and bearing capacity of the joints were tested by pseudo-static test. The seismic performance such as ductility and energy dissipation capacity are studied experimentally. The research results show that combining with the idea that steel structure weakens the end joints of outstretched beams, the position of plastic hinge is moved from the end of beam to the place of weakening, which can avoid the adverse effect of plastic hinge on the core region and meet the seismic design requirements of strong column and weak beam. (2) the energy dissipation performance of the steel beam splicing joint with single cover plate is lower than that of the steel beam splicing joint with double cover plate. The joint is constructed with steel jacket without stirrups, and the core area of the joint has higher bearing capacity and better energy dissipation performance. (4) the hysteretic curve of the joint of cover plate is Z shape, which reflects that there is a great influence of slip on the semi-rigid connection joint with extended end plate. The hysteretic curve of the hysteretic joint is spindle-shaped, and the end-plate buckling can dissipate energy well and has good seismic performance. 6) the friction copper plate on the inner side of the cover plate can play a good energy dissipation effect, and the damaged components may be repaired and replaced by reasonable design. On the basis of experimental research and combined with the failure characteristics of the test, the moment-rotation model of the energy dissipation joint used in the analysis of frame structure is established by using nonlinear connection element, and the numerical simulation of the energy dissipation node of the RCS hybrid structure is carried out. By comparison, it is found that the numerical simulation curve and the experimental curve are basically the same. Therefore, the connection element can be used to simulate the actual friction energy dissipation joints. In order to study the effect of energy dissipation on the whole seismic performance of frame structure with fully assembled RCS hybrid structure, the general frame structure and the frame structure with friction energy dissipation joint are established by SAP2000, and the modal analysis is carried out. The static elastic-plastic nappe analysis is carried out under two loading modes by using the displacement control method. The results show that the stiffness of the connection will affect the low-order natural vibration period of the structure, but it has little effect on the high-order modes. The fully assembled RCS hybrid structure with energy-dissipation joints can effectively reduce the stress at the bottom and show good ductility, and the displacement angles of the structure all meet the requirements of seismic code.
【学位授予单位】：江苏科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU352.11;TU398.9

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