【作者】 顾正维；

【导师】 孙炳楠；

【作者基本信息】 浙江大学 ， 结构工程， 2003， 博士

【摘要】 钢结构的连接可分为刚性连接、半刚性连接、理想铰接。传统的钢框架分析和设计都假定梁与柱的连接是完全刚性的，或是按理想铰接的。而实际全部使用的连接都是介于刚性与理想铰接之间的半刚性连接。 1994年发生的北岭地震(Northridge Earthquake)和1995年发生在日本兵库县南部的阪神地震(Hyogoken Nanbu Earthquake)表明，采用刚性连接的梁柱节点延性较差，容易发生脆性破坏。而半刚性连接如角钢连接、伸展端板螺栓连接、T型钢连接等节点连接具有较强的耗能能力去抵抗一部分地震荷载，它能提供更多的屈服容量和延性容量，同时可节省点的用钢量，这使半刚性连接成为一种既经济又可靠的连接方式。 本文通过节点连接的足尺模型试验和有限元分析，对角钢连接和伸展端板螺栓连接的两类半刚性梁柱节点的承载性能、各组件的受力、螺栓的受力特征进行了研究，主要内容包括： 1．足尺试验：进行了两种角钢连接、三种伸展端板螺栓连接共五种梁柱节点的足尺试验，分析比较了它们在单调荷载作用下的承载力—位移的变化关系以及节点各连接件之间的应力应变关系。 2．有限元分析：根据试验中的五种节点形式，建立了与试验节点相类似的九种节点模型的有限元模型，使用通用有限元分析软件ANSYS，对模型进行了弹性和弹塑性分析，并且与试验结果进行了比较。 通过深入分析试验和有限元计算结果，作者取得了以下成果： 1，总结了五种节点的破坏模式，在有限元和试验结果对比的基础上，分析了不同节点中各组件的受力特征和荷载——位移变化规律以及不同节点的弹性刚度的大小。 2．本文的研究表明：伸展端板螺栓连接是一种既有较强的节点刚度又有较强的延性，是值得推广的一种半刚性的梁柱节点形式。两端伸展的端板螺栓连接(四排螺栓或五排螺栓)是一种较为理想的连接方式。 3．半刚性梁柱连接中的组件—螺栓，它在节点连接中起着至关重要的作用。螺栓在端板连接中的受力与很多因数有关，如：螺栓的预紧力、螺栓的排列位置、螺栓的直径、螺栓的材料等。螺栓在预紧力和外荷载的共同作用下，螺栓内部的受力是非线性变化的。 论文对厂高州蝶朴的受力性能进行了较深入的分析，为半刚性钢结点的设计提供1多饮妃十． 卜达川1丁已成以，人W1纤对勾V点的半叫什卜连接的比l论和设计方法的研究以及探索新w的W为＊bL，仍供了有价值的数抓忖H参考依扰Z。更多还原

【Abstract】 Connection in steel structures is divides into rigid connection, semi-rigid connection, ideal pin connection. The traditional analysis and design of steel frame assume beam-column connections are fully rigid or ideal pin connection. In fact , all connections of the steel structures, in practice, are between to fully rigid and pin connections and belong to semi-rigid connection.From the Northridge earthquake in 1994 and the Kobe earthquake in 1995,it is found out that the rigid connections of beam-column have poor ductility and result brittle fractures easily. But the semi-rigid connections such as angle connections, extended end-plate bolted connections have an excellent energy dissipating mechanism to resist earthquake loads,and provide more capacity for yielding and ductility ..In the meantime, the semi-rigid connections can save steel capacity, and become a kind of not only enconomical.but also reliability connection.This paper, by means of full-size connection experimental study and finite element analysis, investigates the behavior of two-type connections under static loads. All parts of the connections include bolts and angle steels are analyzed and some design recommendations are proposed. The main scopes of this paper includes:I .iixperiments analysis: Five specimens with two types of connections, i.e. two kinds of angle connections and three kinds of extended end-plate bolted connections are tested. For every kind of connection, the relations between stress and strain and the P-A relations under static loads are analyzed and compared.2.Finite element analysis: Finite element models are established based on the profiles of the tested specimens and similar specimens. Elastic and elasto-plastic analyses are conducted with the general-purpose finite element package ANSYS. Also the analysis results are compared with the experimental data.The main conclusions are as follows:I. Based on the comparing of experiments and tested results, five failure models ofvthe connections are studied, and the properties of parts sustained load, the regulars P-A curves and elastic rigidity in different connections are analyzed.2.The studies of this paper reveal that: Extended end-plate bolted connection has not only larger rigidity but also has higher strength and better ductility, It is a perfect type of semi-rigid connection.3.Bolts of the semi-rigid beam-column connections are very important part . The sustained load of the end-plate connections is related to many factors, such as : the pretension loads, the bolt locations, the bolt diameters, the bolt materials, and so on. The sustained loads of the exterior bolts are changed nonlinear under pretension loads and external loads.The deep studies about the behavior of high-strength bolts have provided information to design connections of semi-rigid steel structure.The results described above have provided significant information to develop the theory of steel beam-column semi-rigid connections and their design.更多还原