X形配筋增强异形柱节点受力性能有限元分析
发布时间：2018-11-17 14:47
【摘要】：混凝土异形柱框架结构由于其良好的建筑功能和合理的结构布局,在民用住宅中得到广泛运用。由于异形柱结构中柱截面的特殊形式,异形柱节点比矩形节点薄弱。在地震作用下,节点受力复杂,异形柱节点更容易破坏,限制了异形柱结构体系的高度,因此有必要研究增强异形柱节点受力性能的相关措施。本文通过在节点区增设X形配筋提高异形柱节点的抗震性能。对增设X形配筋的T形柱节点、十形柱节点、Z形柱节点的受力性能分别进行有限元分析,研究工作如下:基于增设X形配筋T形柱节点试验,建立T形柱节点有限元模型,研究往复荷载作用下T形柱节点受力性能。通过对比试验与模型的骨架曲线、承载力和延性,验证模型可靠性。改变X形配筋和梁内纵筋参数,对比分析X形配筋增设对T形柱节点模型的承载力、延性以及混凝土和钢筋应力引起的变化。研究表明:X形配筋可以提高屈服荷载和峰值荷载,试件的屈服位移减小。基于增设X形配筋十形柱节点试验,建立十形柱节点有限元模型,施加往复荷载。对比试验与模型的骨架曲线、承载力和延性,验证模型可靠性。以X形配筋和梁内纵筋为变量,研究十形柱节点受力性能。研究表明:十形柱节点模型延性较好,X形配筋提高十形柱节点屈服荷载和承载力,降低屈服位移。基于Z形柱节点试验,建立Z形柱节点模型。对比试验与模型承载力,验证模型可靠性。在模型节点区腹板中各增设两对X形配筋,分析不同X形配筋和梁内纵筋条件下,X形配筋对Z形柱节点受力性能的影响。研究表明:X形配筋对Z形柱节点承载力提高较小,分担节点区混凝土和箍筋承担的剪力。
[Abstract]:The concrete special-shaped column frame structure is widely used in civil housing because of its good building function and reasonable structural layout. Because of the special form of column section in special-shaped column structure, the joint of special-shaped column is weaker than that of rectangular joint. Under seismic action, the joints are subjected to complex forces, and the joints of special-shaped columns are more easily destroyed, which limits the height of special-shaped column structures. Therefore, it is necessary to study the relevant measures to enhance the mechanical properties of the joints of special-shaped columns. In this paper, the seismic performance of special-shaped column joints is improved by adding X-shaped reinforcement in the joint area. The finite element analysis of T-shaped column joints, ten-column joints and Z-shaped column joints is carried out respectively. The research work is as follows: based on the experiment of adding X-shaped reinforced T-column joints, the finite element model of T-shaped column joints is established. The behavior of T-shaped column joints under reciprocating load is studied. The reliability of the model is verified by comparing the skeleton curve, bearing capacity and ductility of the model. By changing the parameters of X-shaped reinforcement and longitudinal reinforcement in beam, the change of bearing capacity, ductility and stress of concrete and steel bar caused by the addition of X-shaped reinforcement to T-shaped column joint model is analyzed. The results show that the yield load and peak load can be increased and the yield displacement of the specimen is decreased. Based on the test of adding X-shaped reinforced ten-shaped column joint, the finite element model of ten-shaped column joint is established, and the reciprocating load is applied. The skeleton curve, bearing capacity and ductility of the model are compared to verify the reliability of the model. Taking X-shaped reinforcement and longitudinal reinforcement of beam as variables, the mechanical behavior of ten-shaped column joints is studied. The results show that the ductility of the model is good and the yield load and bearing capacity of the joints are increased and the yield displacements are reduced. Based on the test of Z-shaped column joint, the model of Z-shaped column joint is established. The reliability of the model is verified by contrasting test with model bearing capacity. Two pairs of X-shaped reinforcement were added to the web of the model node area. The effect of X-shaped reinforcement on the mechanical behavior of Z-shaped column joints was analyzed under the conditions of different X-shaped reinforcement and longitudinal reinforcement in beam. The results show that the bearing capacity of Z-shaped column joints is increased less by X-shaped reinforcement, and the shear force of concrete and stirrups in the joint zone is shared.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU398.9
本文编号：2338165
[Abstract]:The concrete special-shaped column frame structure is widely used in civil housing because of its good building function and reasonable structural layout. Because of the special form of column section in special-shaped column structure, the joint of special-shaped column is weaker than that of rectangular joint. Under seismic action, the joints are subjected to complex forces, and the joints of special-shaped columns are more easily destroyed, which limits the height of special-shaped column structures. Therefore, it is necessary to study the relevant measures to enhance the mechanical properties of the joints of special-shaped columns. In this paper, the seismic performance of special-shaped column joints is improved by adding X-shaped reinforcement in the joint area. The finite element analysis of T-shaped column joints, ten-column joints and Z-shaped column joints is carried out respectively. The research work is as follows: based on the experiment of adding X-shaped reinforced T-column joints, the finite element model of T-shaped column joints is established. The behavior of T-shaped column joints under reciprocating load is studied. The reliability of the model is verified by comparing the skeleton curve, bearing capacity and ductility of the model. By changing the parameters of X-shaped reinforcement and longitudinal reinforcement in beam, the change of bearing capacity, ductility and stress of concrete and steel bar caused by the addition of X-shaped reinforcement to T-shaped column joint model is analyzed. The results show that the yield load and peak load can be increased and the yield displacement of the specimen is decreased. Based on the test of adding X-shaped reinforced ten-shaped column joint, the finite element model of ten-shaped column joint is established, and the reciprocating load is applied. The skeleton curve, bearing capacity and ductility of the model are compared to verify the reliability of the model. Taking X-shaped reinforcement and longitudinal reinforcement of beam as variables, the mechanical behavior of ten-shaped column joints is studied. The results show that the ductility of the model is good and the yield load and bearing capacity of the joints are increased and the yield displacements are reduced. Based on the test of Z-shaped column joint, the model of Z-shaped column joint is established. The reliability of the model is verified by contrasting test with model bearing capacity. Two pairs of X-shaped reinforcement were added to the web of the model node area. The effect of X-shaped reinforcement on the mechanical behavior of Z-shaped column joints was analyzed under the conditions of different X-shaped reinforcement and longitudinal reinforcement in beam. The results show that the bearing capacity of Z-shaped column joints is increased less by X-shaped reinforcement, and the shear force of concrete and stirrups in the joint zone is shared.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU398.9
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