钢框架新型全螺栓连接节点抗震性能试验研究

发布时间：2018-05-23 18:50

本文选题：新型全螺栓连接 + 抗震性能　；参考：《石河子大学》2017年硕士论文

【摘要】：我国属于地震多发的国家,钢结构由于其较好的抗震性能和自重轻、施工周期短、投资回收快、环境污染少等优点越来越受到大众的广泛关注。方钢管柱与焊接组合H形钢梁作为钢框架结构的承载构件在其中的作用不言而喻。梁柱连接节点是钢框架的重要部件,在整个结构中起了至关重大的作用。此外,不同的连接形式对结构的抗震性能也有很大影响,其连接形式的优劣直接关系到结构的承载力和抗震性能的好坏。故针对方钢管柱与焊接组合H形钢梁连接中方钢管四周封闭不能简单通过高强螺栓普通连接、现行的全焊接连接方式因焊接质量参差不齐而导致节点连接承载力和抗震性能降低等问题,提出了方钢管柱与H形钢梁采用新型全螺栓的连接方式,螺栓不再需要螺帽,直接在连接钢板上攻出丝扣,有丝扣的钢板起到螺帽的作用,一步到位进行梁柱连接;本文针对采用所提出的新型节点连接方式所连接的节点,通过对其承载力、抗震性能和破坏形态等进行分析研究,得出各柱壁、端板组合下节点之间的内在联系,并得出最优柱壁端板组合。其主要内容及相关结论如下:(1)采用试验与理论推导相结合的方法,运用弹性力学的相关知识对螺栓充当集中力作用下弹性薄板相应点的挠曲变化进行研究,并针对试验模型推导出了方钢管管壁与贴板焊接薄板上对应点的挠度近似值公式。通过该公式并代入尺寸参数可以得出螺杆处单根螺栓拉力值与该螺栓点处的挠曲值的相应关系。(2)为了研究方钢管柱与焊接组合H形钢梁的新型全螺栓连接节点在柱壁厚度、端板厚度、材料型号等参数变化下的抗震性能,并找出其相应的破坏形态,试验设计了六组截面尺寸为200mm×200 mm的十字形组合节点试件。通过对其进行低周反复加载试验,获得了相应节点对应的滞回曲线、骨架曲线等试验数据和破坏现象,通过分析其抗震性能和破坏形态得出了最优柱壁、端板厚度组合。试验结果表明:截面尺寸为200 mm×200 mm的方钢管柱-H形钢梁组合节点在合理的柱壁、端板厚度范围内,柱壁厚度相同,端板厚度相对较薄的节点极限承载力高,延性较好;而且在此方钢管柱的截面尺寸下,柱壁、端板厚度组合为20 mm×16 mm时,节点的抗震性能最优。(3)为了研究不同截面尺寸下新型连接节点破坏形态的异同及其抗震性能的变化,试验新增了5组截面尺寸为300 mm×300 mm的方钢管梁柱连接节点,分别对其抗震性能进行研究,并与截面尺寸均为200 mm×200 mm方钢管梁柱连接节点进行对比分析。试验结果表明:截面尺寸为200 mm×200 mm的方钢管滞回性能较优的柱壁端板组合为柱壁厚20 mm,端板厚16 mm。而随着截面尺寸增大,所对应的最优柱壁端板组合的厚度也会相应增大。当柱壁、端板厚度组合由20 mm、16 mm组合而成时,截面尺寸越大,耗能能力越强;而当柱壁、端板厚度超出20mm时,柱壁端板厚度过大,截面尺寸越大,耗能能力反而下降。
[Abstract]:China is a country with many earthquakes. The steel structure has attracted more and more attention because of its good seismic performance and light weight, short construction period, quick investment recovery and less environmental pollution. The role of square steel pipe column and welded composite H shaped steel beam as the bearing member of steel frame structure is self-evident. Point is an important part of the steel frame, which plays a vital role in the whole structure. In addition, the different connection forms have a great influence on the seismic performance of the structure. The connection form is directly related to the bearing capacity and the seismic performance of the structure. Therefore, the steel pipe column of the other side of the steel tube and the welded combination H steel beam are connected to the Chinese steel tube four. The circular sealing can not be simply connected by the high strength bolt. The current full welding connection is caused by the uneven welding quality, which leads to the reduction of the joint bearing capacity and the decrease of the seismic performance. A new full bolt connection method is proposed for the square steel tube column and the H shaped steel beam. The bolt no longer needs the screw cap, and the wire is directly attacked out of the steel plate. Buckle, the steel plate with the buckle plays the role of the nut, and carries on the beam column connection in one step. In this paper, the joints connected by the new type of joint connection are analyzed and studied through the analysis of its bearing capacity, the seismic performance and the failure form, and the inner connection between the column walls and the end plates is obtained, and the optimal column wall is obtained. The main contents and the related conclusions are as follows: (1) using the method of combining the experimental and theoretical deduction, the deflection of the corresponding points of the elastic thin plate under the action of the bolt is studied by using the relevant knowledge of elastic mechanics, and the corresponding points on the welded thin plate of the square tube wall and the attached plate are deduced. The formula of deflection approximate value. Through this formula and replacing the size parameter, the corresponding relationship between the tension value of single bolt at the screw and the deflection value at the bolt point can be obtained. (2) in order to study the aseismic behavior of the new type of all bolt connection joints of the square steel pipe column and the welded combination H shaped steel beam with the thickness of the column wall, the thickness of the end plate, the material model and so on. Six groups of cross section specimens with cross section size of 200mm x 200 mm are designed. The test data of the corresponding hysteresis curves, skeleton curves and other experimental data and damage phenomena corresponding to the corresponding nodes are obtained by the test of the cross section of the cross section of the cross section. The results are obtained by analyzing its seismic performance and failure form. The optimum column wall and end plate thickness combination. The test results show that the composite joint of square steel tube column with 200 mm x 200 mm section is in reasonable column wall, the thickness of end plate, the thickness of the column wall is the same, the thickness of the end plate is relatively thin, and the ultimate bearing capacity is higher and the ductility is better. Moreover, under the cross section size, column wall and end plate of the square steel pipe column. When the thickness combination is 20 mm x 16 mm, the seismic performance of the joint is the best. (3) in order to study the differences and similarities and the changes in the seismic performance of the new connection joints under different cross section sizes, 5 groups of square steel tube beam column connections with the size of 300 mm x 300 mm are added in the experiment. The beam column connection joints of 200 mm x 200 mm square steel pipe are compared and analyzed. The test results show that the column wall thickness of column wall is 20 mm and the end plate thickness is 16 mm., with the cross section size of 200 mm x 200 mm, and the thickness of the end plate of the best column wall corresponding to the column wall will increase accordingly. When the end plate thickness combination is composed of 20 mm and 16 mm, the larger the section size, the stronger the energy dissipation, and when the column wall, the end plate thickness exceeds the 20mm, the thickness of the end plate of the column wall is too large, the larger the section size is, the energy dissipation capacity decreases.
【学位授予单位】：石河子大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU391;TU352.11

【参考文献】