带隔板型钢混凝土梁柱节点抗震性能试验研究
发布时间：2018-07-18 17:20
【摘要】：混合结构体系较多地被运用在高层及超高层结构中,实际的工程运用中仍存在着需要解决的问题。目前国内外关于型钢混凝土的研究主要集中在型钢混凝土框架节点的抗震性能研究、型钢混凝土框架结构的抗震性能的研究、型钢混凝土抗火方面的研究这三个方面。对于简化型钢混凝土节点设计与提出新的节点构造形式以简化施工过程方面的研究较少,对型钢混凝土梁柱节点核心区的抗剪性能和抗剪承载力的计算公式还有待于进一步研究。我国现有的型钢混凝土梁柱节点的设计依然采用在型钢梁柱腹板上开洞来穿过箍筋的做法,这样不但施工较为困难,而且削弱了型钢的腹板,对节点的承载力有一定的影响。本文在参考现有型钢混凝土梁柱节点构造形式的基础上,结合国内外关于型钢混凝土节点核心区抗剪机理的理论,设计了一种在核心区设置隔板的型钢混凝土粱柱节点(试件SRCJ-1),并进行抗震性能试验研究。同时,设计了一种按照传统做法的构件和-种核心区不配置箍筋的构件(分别为试件SRCJ-2和试件SRCJ-3),同样对这两种构件进行了低周往复加载试验。试件设计均遵照“强梁弱柱弱节点”的原则进行,通过试验得到各构件的裂缝开展与分布规律、梁端荷载位移曲线、构件主要应变。根据试验结果,分析得到了结构的破坏机理、粱端骨架曲线、屈服荷载与极限荷载、位移延性系数与耗能性能、强度衰减曲线与刚度退化曲线以及节点核心区主要应变发展规律。通过对这些内容的分析,我们得到了以下结论：所有构件的破坏形式均为核心区剪切斜压破坏,与设计目的相符；试件SRCJ-2与SRCJ-3的屈服荷载、极限荷载及抗震性能均基本能够保持一致,试件SRCJ-1较两者略低；试件SRCJ-2与试件SRCJ-3强度衰减与刚度退化趋势两者吻合较好,试件SRCJ-1前期能够与前两者保持一致,后期降低较快。对型钢混凝土抗剪承载力的研究表明：型钢混凝土梁柱节点的抗剪承载力主要由混凝土提供,混凝土斜压杆的抗剪承载力约占总承载力的80%以上,型钢抗剪承载力约占15%,箍筋的抗剪承载力仅占总承载能力的5%；试件SRCJ-2的抗剪承载力较试件SRCJ-3抗剪承载力低约10%,节点核心区设置隔板能够有效约束混凝土；建议节点核心区的抗剪承载力计算不考虑箍筋部分的作用,把这部分作为抗剪承载力的安全储备。研究成果对提出受力合理,便于设计和施工的新型的梁柱节点形式提供了试验数据与理论依据,不仅使设计和施工工序得到简化,还使施工质量得到保证。
[Abstract]:The hybrid structure system is widely used in high-rise and super-high-rise structures, but there are still some problems to be solved in practical engineering application. At present, the research on SRC at home and abroad mainly focuses on the seismic behavior of SRC frame joints, the seismic behavior of SRC frame structures and the fire resistance of SRC. There are few researches on simplifying the design of SRC joints and proposing a new form of joint construction to simplify the construction process. The formulas for calculating the shear behavior and shear bearing capacity of SRC Liang Zhu joints in the core area need to be further studied. The existing steel reinforced concrete Liang Zhu joints in our country are still designed by opening holes in the section steel Liang Zhu web to pass through stirrups. This not only makes construction more difficult, but also weakens the web plate of the section steel and has a certain effect on the bearing capacity of the joints. On the basis of referring to the existing structural forms of steel reinforced concrete (SRC) Liang Zhu joints, this paper combines the theory of shear resistance in the core region of SRC joints at home and abroad. A SRC beam column joint (SRCJ-1) with a partition in the core area is designed, and the seismic behavior of SRCJ-1 is studied. At the same time, a kind of component (SRCJ-2 and SRCJ-3) is designed according to the traditional method and the core region is not equipped with stirrups. The low cycle reciprocating loading tests are also carried out for these two kinds of components. The design of the specimens is carried out according to the principle of "strong beam and weak column weak joint". The crack development and distribution law of each member, the load displacement curve at the end of the beam and the main strain of the member are obtained through the test. According to the test results, the failure mechanism of the structure, the skeleton curve of the beam end, the yield load and the ultimate load, the displacement ductility coefficient and the energy dissipation performance are obtained. The strength attenuation curve, stiffness degradation curve and the main strain development law in the core region of the joint. Through the analysis of these contents, we get the following conclusions: the failure form of all the components is the shear baroclinic failure in the core area, which is consistent with the design purpose, the yield load of the specimen SRCJ-2 and SRCJ-3, the yield load of SRCJ-2 and SRCJ-3, The ultimate load and seismic performance are basically consistent, the SRCJ-1 is slightly lower than both, the strength attenuation and stiffness degradation trend of SRCJ-2 and SRCJ-3 are in good agreement, the former SRCJ-1 is consistent with the former, and the latter is decreasing rapidly. The research on the shear bearing capacity of steel reinforced concrete (SRC) shows that the shear bearing capacity of SRC Liang Zhu joints is mainly provided by concrete, and the shear bearing capacity of concrete inclined compression bar accounts for more than 80% of the total bearing capacity. The shear bearing capacity of section steel is about 15 percent, the shear capacity of stirrups is only 5 percent of the total bearing capacity, the shear capacity of the specimen SRCJ-2 is about 10 percent lower than that of the specimen SRCJ-3, and the partition in the core zone of the joint can effectively constrain concrete. It is suggested that the calculation of shear bearing capacity in the core region of joints does not consider the role of stirrups, and this part is considered as the safe reserve of shear bearing capacity. The research results provide experimental data and theoretical basis for proposing a new type of Liang Zhu node with reasonable force and convenient design and construction. It not only simplifies the design and construction process, but also ensures the construction quality.
【学位授予单位】：沈阳建筑大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU398.9
[Abstract]:The hybrid structure system is widely used in high-rise and super-high-rise structures, but there are still some problems to be solved in practical engineering application. At present, the research on SRC at home and abroad mainly focuses on the seismic behavior of SRC frame joints, the seismic behavior of SRC frame structures and the fire resistance of SRC. There are few researches on simplifying the design of SRC joints and proposing a new form of joint construction to simplify the construction process. The formulas for calculating the shear behavior and shear bearing capacity of SRC Liang Zhu joints in the core area need to be further studied. The existing steel reinforced concrete Liang Zhu joints in our country are still designed by opening holes in the section steel Liang Zhu web to pass through stirrups. This not only makes construction more difficult, but also weakens the web plate of the section steel and has a certain effect on the bearing capacity of the joints. On the basis of referring to the existing structural forms of steel reinforced concrete (SRC) Liang Zhu joints, this paper combines the theory of shear resistance in the core region of SRC joints at home and abroad. A SRC beam column joint (SRCJ-1) with a partition in the core area is designed, and the seismic behavior of SRCJ-1 is studied. At the same time, a kind of component (SRCJ-2 and SRCJ-3) is designed according to the traditional method and the core region is not equipped with stirrups. The low cycle reciprocating loading tests are also carried out for these two kinds of components. The design of the specimens is carried out according to the principle of "strong beam and weak column weak joint". The crack development and distribution law of each member, the load displacement curve at the end of the beam and the main strain of the member are obtained through the test. According to the test results, the failure mechanism of the structure, the skeleton curve of the beam end, the yield load and the ultimate load, the displacement ductility coefficient and the energy dissipation performance are obtained. The strength attenuation curve, stiffness degradation curve and the main strain development law in the core region of the joint. Through the analysis of these contents, we get the following conclusions: the failure form of all the components is the shear baroclinic failure in the core area, which is consistent with the design purpose, the yield load of the specimen SRCJ-2 and SRCJ-3, the yield load of SRCJ-2 and SRCJ-3, The ultimate load and seismic performance are basically consistent, the SRCJ-1 is slightly lower than both, the strength attenuation and stiffness degradation trend of SRCJ-2 and SRCJ-3 are in good agreement, the former SRCJ-1 is consistent with the former, and the latter is decreasing rapidly. The research on the shear bearing capacity of steel reinforced concrete (SRC) shows that the shear bearing capacity of SRC Liang Zhu joints is mainly provided by concrete, and the shear bearing capacity of concrete inclined compression bar accounts for more than 80% of the total bearing capacity. The shear bearing capacity of section steel is about 15 percent, the shear capacity of stirrups is only 5 percent of the total bearing capacity, the shear capacity of the specimen SRCJ-2 is about 10 percent lower than that of the specimen SRCJ-3, and the partition in the core zone of the joint can effectively constrain concrete. It is suggested that the calculation of shear bearing capacity in the core region of joints does not consider the role of stirrups, and this part is considered as the safe reserve of shear bearing capacity. The research results provide experimental data and theoretical basis for proposing a new type of Liang Zhu node with reasonable force and convenient design and construction. It not only simplifies the design and construction process, but also ensures the construction quality.
【学位授予单位】：沈阳建筑大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU398.9
【相似文献】
相关期刊论文 前10条
1 朱s，
本文编号：2132609
本文链接：https://www.wllwen.com/guanlilunwen/chengjian/2132609.html
