钢梁与混凝土剪力墙正交节点试验研究

发布时间：2018-06-20 12:52

本文选题：正交节点 + 抗震性能　；参考：《沈阳建筑大学》2013年硕士论文

【摘要】：近年来,钢-混凝土混合结构在我国的高层建筑中得到了较为广泛的应用。混合结构兼有钢结构和混凝土结构的优点,能充分的发挥钢材与混凝土在强度、刚度、延性、耗能性能及建筑功能适用性方面的优势。然而,国内外对这种结构体系的了解还不够深入,我国相应的规范研究的内容还不全面,尚需进行大量的研究工作。本文完成了6个钢梁-混凝土剪力墙正交节点试件,包括1组(三个试件)采用梁端锚固的节点及1组(三个试件)90。弯钩锚固的节点试件,在墙顶作用轴压力和梁端往复荷载作用下的试验,试件设计为强梁弱墙,弱节点型。通过试验和非线性有限元分析研究其抗震性能,首先对两种锚固形式不同的正交节点进行了低周反复荷载试验研究,描述了试验过程及试验现象并得到了滞回曲线、骨架曲线等相关的试验结果；其次将6个试件的试验结果进行了对比分析,包括在低周反复荷载作用下的破坏形态、滞回曲线、承载力、刚度退化、延性、耗能能力、主要部位的应变等特征。结果表明：采用梁端锚固的节点试件的承载力和变形能力有大幅提高,锚固性能增强,但是在延性和耗能能力方面没有明显的差别。在平面外弯矩和轴压力作用下,剪力墙受力不均匀并使其纵向钢筋和水平钢筋应变较大,围绕着节点板沿墙高和墙宽的方向有一个有效受力范围。剪力墙高度和宽度方向上,在节点板附近区域的应力高于远离节点板的区域；在采用梁端锚固的节点和90。弯钩锚固的节点中,反复荷载作用下与钢梁翼缘连接处节点板出现向外鼓屈现象,这种破坏对锚筋的受力性能不利,应采取措施改变构造；最后等试验研究后,运用有限元软件ABAQUS对试验试件进行了非线性有限元分析,分析结果与试验结果基本吻合,验证了有限元分析的可靠性。在此基础上对影响节点承载力和抗震性能的因素包括轴压比、锚板厚度、锚筋截面面积、锚筋布置方式、混凝土强度等进行了初步的分析,讨论了这些因素的改变给节点抗震性能带来的影响。
[Abstract]:In recent years, steel-concrete hybrid structures have been widely used in high-rise buildings in China. Hybrid structure has the advantages of both steel structure and concrete structure, which can give full play to the advantages of steel and concrete in strength, stiffness, ductility, energy dissipation performance and building function applicability. However, the understanding of this kind of structure system at home and abroad is not deep enough, the contents of the corresponding normative research in our country are not comprehensive, and a great deal of research work is needed. In this paper, six steel beam-concrete shear wall specimens with orthogonal joints have been completed, including one group (three specimens) and one group (three specimens) with anchoring at the end of the beam. The test results show that the joint specimens are designed as strong beams weak walls and weak joints under the axial pressure at the top of the wall and the reciprocating load at the end of the beam. The seismic behavior of the joint is studied by means of test and nonlinear finite element analysis. First, the low cycle repeated load test is carried out for two kinds of orthogonal joints with different anchoring forms. The experimental process and experimental phenomena are described, and the hysteretic curves are obtained. Secondly, the test results of 6 specimens are compared and analyzed, including failure form, hysteretic curve, bearing capacity, stiffness degradation, ductility, energy dissipation capacity under low cyclic loading. The strain characteristics of the main parts. The results show that the bearing capacity and deformation capacity of the joints with beam end Anchorage are greatly improved and the anchoring performance is enhanced, but there is no obvious difference in ductility and energy dissipation capacity. Under the action of off-plane bending moment and axial pressure, the shear wall is subjected to non-uniform force and the strain of longitudinal and horizontal reinforcement is larger, and there is an effective force range around the joint slab along the direction of the wall height and the wall width. In the direction of the height and width of the shear wall, the stress in the area near the joint plate is higher than that in the area far away from the joint plate; In the joints with bending hook anchoring, the joint plate at the joint with the flange of steel beam appears outward bulging and bending phenomenon under the action of repeated load, this kind of failure is unfavorable to the mechanical performance of the anchor bar, so measures should be taken to change the structure; finally, after the experimental study, some measures should be taken to change the structure. The nonlinear finite element analysis of the test specimen is carried out with the finite element software Abaqus. The results of the analysis are in good agreement with the test results, and the reliability of the finite element analysis is verified. On this basis, the factors affecting the bearing capacity and seismic performance of joints are analyzed, including axial compression ratio, thickness of anchor plate, cross-section area of anchor bars, arrangement of anchor bars, strength of concrete, etc. The influence of these factors on the seismic behavior of joints is discussed.
【学位授予单位】：沈阳建筑大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU973.14

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