一种新型梁柱装配式刚性节点力学性能研究
发布时间：2018-10-12 20:41
【摘要】：传统钢结构梁柱连接广泛采用焊接节点形式，但焊接节点对施工现场气候、焊接技术要求高、易产生脆性破坏；且大量的焊接节点增加了检测成本和安全隐患；同时焊接形成的大型构件运输成本较高，不利于降低成本，最理想的方式是将节点单独形成产品。“装配式节点”——新住宅产业化技术，突破了焊接式整体构件连接方式，可以形成独立的标准化连接产品，替代目前焊接型住宅钢结构节点，能明显的降低系统成本，对实现钢结构建筑节能降耗能发挥独特的作用。 本文研究一种新型梁柱装配式刚性连接节点，它包括钢柱和与钢柱焊接的悬臂梁段、钢框架梁、拼接板及配套的螺栓，其中梁的上翼缘拼接板布置在钢框架梁上侧，并预先在工厂内与上翼缘完成焊接，梁的下翼缘拼接板布置在悬臂梁下侧，并预先在工厂内与下翼缘完成焊接，在现场安装过程中，梁的上、下翼缘充当就位板的作用，构件就位后，梁的上、下翼缘和腹板全部用螺栓连接，实现梁柱节点的刚性连接。这种连接形式克服了焊缝连接的延性差，易产生脆性裂缝以及施工现场对气候、焊工技术要求高等缺点，具有耗能能力好、变形能力强、施工速度快、施工质量易保证等优点。 本文以新型梁柱装配式刚性节点为研究对象，分别利用等强度设计法，实用设计法，精确设计法和简化设计法设计新型梁柱装配式刚性节点。利用有限元分析软件ABAQUS对四种方法设计的节点进行非线性数值分析，对新型梁柱装配式刚性节点的力学性能进行对比分析。在对新型梁柱装配式刚性节点等强度初步设计的基础上，通过变化梁翼缘拼接板宽度、厚度、长度、梁段预留长度和梁腹板拼接板厚度五个参数设计了5个系列共23个模型，研究拼接参数对节点力学性能的影响。对节点分别施加单调静力荷载和低周反复荷载，得到在单调荷载作用下的破坏模式和荷载-位移曲线以及在循环荷载作用下的破坏模式和滞回曲线，揭示了节点的承载力、滞回性能和破坏模式随拼接参数的变化规律，，并给出参数合理取值范围。最后主要通过变化钢柱节点域柱翼缘板厚度和横向加劲肋厚度来研究这两个几何参数取值对节点域力学性能的影响，并给出这两个参数的取值范围。
[Abstract]:The traditional steel structure Liang Zhu connection widely uses the welding joint form, but the welding joint to the construction site climate, the welding technology request is high, easy to produce the brittle destruction, and a large number of welded joints increased the inspection cost and the safety hidden danger. At the same time, the transportation cost of the large components formed by welding is high, which is not conducive to reducing the cost. The most ideal way is to form the joint into a product separately. The "assembly node"-the new housing industrialization technology, breaks through the jointing mode of welded integral components, and can form an independent standardized connection product, which can replace the present welded steel structure joints of residential buildings, and can obviously reduce the system cost. It plays a unique role in energy saving and consumption reduction of steel structure buildings. In this paper, a new type of Liang Zhu assembled rigid connection joint is studied, which includes steel column, cantilever beam section welded with steel column, steel frame beam, splice plate and matching bolt, in which the upper flange splice plate of the beam is arranged on the upper side of the steel frame beam. The upper flange of the beam is welded with the upper flange in advance, the lower flange of the beam is arranged on the lower side of the cantilever beam, and the lower flange is welded with the lower flange in the factory. During the field installation, the upper and lower flange of the beam acts as a position plate. After the member is in place, the upper, lower flange and web of the beam are bolted to realize the rigid connection of Liang Zhu joint. This kind of connection overcomes the disadvantages of poor ductility of weld joint, easy to produce brittle crack, climate of construction site, high technical requirement of welder and so on. It has the advantages of good energy dissipation ability, strong deformation ability, fast construction speed, easy guarantee of construction quality, and so on. In this paper, a new type of Liang Zhu assembled rigid node is studied, and the new type Liang Zhu assembly rigid joint is designed by using the equal strength design method, the practical design method, the precise design method and the simplified design method respectively. The nonlinear numerical analysis of the joints designed by four methods was carried out by using the finite element analysis software ABAQUS, and the mechanical properties of the new Liang Zhu assembled rigid joints were compared and analyzed. On the basis of the initial design of the new type Liang Zhu assembled rigid joints with equal strength, five series of 23 models were designed by changing the width, thickness, length, reserved length of beam segment and thickness of beam web splice plate. The effect of splicing parameters on the mechanical properties of joints is studied. The failure mode and load-displacement curve under monotone load and the failure mode and hysteretic curve under cyclic load are obtained by applying monotone static load and low-cycle repeated load, respectively, and the bearing capacity of the joint is revealed. The hysteretic performance and failure mode vary with the splicing parameters, and the reasonable range of parameters is given. Finally, the influence of these two geometric parameters on the mechanical properties of the joint domain is studied by changing the flange plate thickness and the transverse stiffening rib thickness of the steel column joint domain, and the range of the two parameters is given.
【学位授予单位】：青岛理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU391
[Abstract]:The traditional steel structure Liang Zhu connection widely uses the welding joint form, but the welding joint to the construction site climate, the welding technology request is high, easy to produce the brittle destruction, and a large number of welded joints increased the inspection cost and the safety hidden danger. At the same time, the transportation cost of the large components formed by welding is high, which is not conducive to reducing the cost. The most ideal way is to form the joint into a product separately. The "assembly node"-the new housing industrialization technology, breaks through the jointing mode of welded integral components, and can form an independent standardized connection product, which can replace the present welded steel structure joints of residential buildings, and can obviously reduce the system cost. It plays a unique role in energy saving and consumption reduction of steel structure buildings. In this paper, a new type of Liang Zhu assembled rigid connection joint is studied, which includes steel column, cantilever beam section welded with steel column, steel frame beam, splice plate and matching bolt, in which the upper flange splice plate of the beam is arranged on the upper side of the steel frame beam. The upper flange of the beam is welded with the upper flange in advance, the lower flange of the beam is arranged on the lower side of the cantilever beam, and the lower flange is welded with the lower flange in the factory. During the field installation, the upper and lower flange of the beam acts as a position plate. After the member is in place, the upper, lower flange and web of the beam are bolted to realize the rigid connection of Liang Zhu joint. This kind of connection overcomes the disadvantages of poor ductility of weld joint, easy to produce brittle crack, climate of construction site, high technical requirement of welder and so on. It has the advantages of good energy dissipation ability, strong deformation ability, fast construction speed, easy guarantee of construction quality, and so on. In this paper, a new type of Liang Zhu assembled rigid node is studied, and the new type Liang Zhu assembly rigid joint is designed by using the equal strength design method, the practical design method, the precise design method and the simplified design method respectively. The nonlinear numerical analysis of the joints designed by four methods was carried out by using the finite element analysis software ABAQUS, and the mechanical properties of the new Liang Zhu assembled rigid joints were compared and analyzed. On the basis of the initial design of the new type Liang Zhu assembled rigid joints with equal strength, five series of 23 models were designed by changing the width, thickness, length, reserved length of beam segment and thickness of beam web splice plate. The effect of splicing parameters on the mechanical properties of joints is studied. The failure mode and load-displacement curve under monotone load and the failure mode and hysteretic curve under cyclic load are obtained by applying monotone static load and low-cycle repeated load, respectively, and the bearing capacity of the joint is revealed. The hysteretic performance and failure mode vary with the splicing parameters, and the reasonable range of parameters is given. Finally, the influence of these two geometric parameters on the mechanical properties of the joint domain is studied by changing the flange plate thickness and the transverse stiffening rib thickness of the steel column joint domain, and the range of the two parameters is given.
【学位授予单位】：青岛理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU391
【参考文献】
相关期刊论文 前10条
1 周殿文;金丽萍;
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