箱型柱—工字型梁顶底角钢节点受力性能研究

发布时间：2018-05-14 13:18

本文选题：钢框架 + 箱型柱　；参考：《哈尔滨工业大学》2015年硕士论文

【摘要】：目前,钢框架结构已经在多层和高层建筑中得到了非常广泛地应用。在钢框架结构体系中,连接框架梁柱的节点是影响框架整体强度和工作性能的核心因素。节点的构造和工作性能决定了钢结构的经济指标、施工方法、安全性以及适用范围等。相比于传统的刚接钢结构节点,半刚性具有更加优秀的转动能力和更好的延性,可以通过自身的变形在地震中更好地消耗能量,而避免脆性破坏。半刚性节点具有多种多样的构造形式。当前各国学者正致力于研发出力学性能优良、施工更简便以及具有更高性价比的新型钢结构节点。提出一种符合上述条件的节点连接方式,探索新节点在静荷载和动荷载作用下的力学性能,进而优化节点的构造和抗震设计方案,具有重要的理论和实际意义。本文对一种新型钢框架梁柱节点连接形式—箱型柱—工字型梁顶底角钢节点进行了有限元模拟研究,建立足尺模型分别模拟节点静载试验和低周往复荷载试验。观察并总结节点的应力分布和应力发展规律;探讨节点的破坏机理和破坏方式;确定组成节点各构件的参数变化对节点工作性能的影响;提取节点弯矩—转角曲线和滞回曲线;归纳节点的初始转动刚度、强度以及耗能性能等;对比无隔板箱型柱—工字型梁顶底角钢节点与内置横纵隔板箱型柱—工字型梁顶底角钢连接节点工作性能。采用简化分析方法,讨论了节点弯矩承载力的计算方法。本文的研究结果表明:1)箱型柱—工字型梁顶底角钢高强螺栓节点是一种典型的半刚性连接方式,同时兼备良好的初始刚度和弯矩承载力,在地震荷载的作用下具有良好的延性和耗能能力;2)顶底角钢的厚度和螺栓孔开设位置是影响节点刚度和承载能力的主要因素;3)箱型柱—工字型梁顶底角钢节点在有轴力影响的工作状态下仍能够保持良好的工作性能;4)内置横纵隔板可以有效地提高箱型柱—工字型梁节点抗震性能;5)采用简化分析方法计算可以求得较为合理的节点弯矩承载力。
[Abstract]:At present, steel frame structures have been widely used in multi-storey and high-rise buildings. In the steel frame structure system, the joint of the frame Liang Zhu is the core factor which affects the overall strength and the working performance of the frame. The construction and working performance of the joint determine the economic index, construction method, safety and applicable range of steel structure. Compared with the traditional steel joints semi-rigid has better rotation ability and better ductility which can consume energy better and avoid brittle failure through its own deformation. Semi-rigid joints have a variety of structural forms. At present, scholars all over the world are devoting themselves to the development of new steel structural joints with excellent mechanical properties, simpler construction and higher cost performance. It is of great theoretical and practical significance to propose a joint connection mode which meets the above conditions, to explore the mechanical properties of the new joint under static and dynamic loads, and to optimize the joint structure and seismic design scheme. In this paper, the finite element simulation of a new type of steel frame Liang Zhu joint connection, box column-I-beam angle joint, is carried out, and a full-scale model is established to simulate the static load test and low-cycle reciprocating load test respectively. Observe and summarize the stress distribution and stress development law of the joint; discuss the failure mechanism and failure mode of the joint; determine the influence of the parameter change of each component of the joint on the joint performance; extract the moment-rotation curve and hysteretic curve of the joint; The initial rotational stiffness, strength and energy dissipation performance of the joint are summarized, and the working performance of the connection joint between the top and bottom angle steel joint of the box column and I-shaped beam without partition plate is compared with that of the top-bottom angle steel joint of the built-in transverse mediastinal box-I-shaped beam. A simplified analysis method is used to calculate the moment bearing capacity of joints. The research results of this paper show that the high strength bolt joint of box column and I-shaped beam is a typical semi-rigid connection, and it also has good initial stiffness and bending moment bearing capacity. The thickness of top and bottom angle steel and the opening position of bolt hole are the main factors influencing the joint stiffness and bearing capacity. 4) the built-in transverse plate can effectively improve the seismic performance of box column-I-shaped beam joints. 5) the simplified analysis method can be used to calculate the seismic behavior of the joints of box column-I-shaped beams. The moment bearing capacity of the joint.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU391

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