火灾后型钢混凝土柱抗震性能试验研究
发布时间：2018-07-16 13:53
【摘要】：在现代社会,高层和超高层建筑结构越来越多,建筑火灾屡屡发生,其中不乏房屋局部或全部倒塌的重特大事故,人民的生命和财产安全受到越来越大的威胁。因此,建筑结构抗火性能的研究显得愈发的重要和严峻。随着我国城市化水平越来越高,型钢混凝土结构由于其优越的性能受到了越来越多的关注,也得到了越来越广泛的应用。但是,由于推广时间短,相比较于混凝土结构,型钢混凝土结构的学术研究较少,火灾后型钢混凝土结构的力学性能的研究就更加稀少了。因此,深入研究型钢混凝土构件的火灾后的力学性能具有非常重大的意义和价值。 本文针对火灾后型钢混凝土柱抗震试验研究,进行的主要研究内容和成果包括以下几个方面： 1、采用标准升温曲线对型钢混凝土柱进行了过火试验,并选取了不同的受火时间,模拟不同的过火工况,对构件的温度场进行研究分析。 2、选取合理的型钢和混凝土的热工参数,利用有限元分析软件ABAQUS建立型钢混凝土柱温度场有限元模型,并与过火试验得到的各个对应测点的温度结果进行对比分析,验证模型的有效性。 3、本文的重点在于,以型钢混凝土柱过火试验为基础,对八根型钢混凝土柱进行抗震性能的试验研究。试验中了得到了构件的滞回曲线和骨架曲线,研究了构件在试验过程中裂缝发展情况和最终破坏形态。同时分析了受火时间、轴压比、含钢率和有无栓钉等因素对型钢混凝土柱滞回曲线、骨架曲线、延性、刚度退化规律、耗能能力等指标的影响规律,并为火灾后型钢混凝土柱抗震性能的有限元计算模型提供试验验证依据。
[Abstract]:In modern society, there are more and more high-rise and super-high-rise building structures, building fires occur frequently, and there are some serious and serious accidents of partial or total collapse of buildings, and the safety of people's lives and property is threatened more and more. Therefore, the study of fire resistance of building structure becomes more and more important and severe. With the increasing level of urbanization in China, steel reinforced concrete structures have received more and more attention because of their superior performance, and have been more and more widely used. However, due to the short spreading time, compared with the concrete structure, there is less academic research on the steel reinforced concrete structure, and the research on the mechanical properties of the steel reinforced concrete structure after fire is more rare. Therefore, it is of great significance and value to study the mechanical properties of SRC members after fire. The main research contents and achievements of this paper are as follows: 1. The overfire test of SRC columns is carried out by using the standard heating curve. Different fire time was selected to simulate different overfire conditions, and the temperature field of members was studied and analyzed. 2. Reasonable thermal parameters of steel and concrete were selected. The finite element analysis software Abaqus is used to establish the finite element model of the temperature field of steel reinforced concrete columns, and the results are compared with the temperature results obtained from the overfire test to verify the validity of the model. Based on the overfire test of steel reinforced concrete columns, the seismic behavior of eight steel reinforced concrete columns was studied. The hysteretic curve and skeleton curve are obtained, and the crack development and ultimate failure pattern are studied. At the same time, the influences of fire time, axial compression ratio, steel content and stud on the hysteretic curve, skeleton curve, ductility, stiffness degradation and energy dissipation capacity of SRC columns are analyzed. It also provides experimental verification basis for the finite element model of seismic behavior of steel reinforced concrete columns after fire.
【学位授予单位】：北京建筑大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU398.9;TU352.11
[Abstract]:In modern society, there are more and more high-rise and super-high-rise building structures, building fires occur frequently, and there are some serious and serious accidents of partial or total collapse of buildings, and the safety of people's lives and property is threatened more and more. Therefore, the study of fire resistance of building structure becomes more and more important and severe. With the increasing level of urbanization in China, steel reinforced concrete structures have received more and more attention because of their superior performance, and have been more and more widely used. However, due to the short spreading time, compared with the concrete structure, there is less academic research on the steel reinforced concrete structure, and the research on the mechanical properties of the steel reinforced concrete structure after fire is more rare. Therefore, it is of great significance and value to study the mechanical properties of SRC members after fire. The main research contents and achievements of this paper are as follows: 1. The overfire test of SRC columns is carried out by using the standard heating curve. Different fire time was selected to simulate different overfire conditions, and the temperature field of members was studied and analyzed. 2. Reasonable thermal parameters of steel and concrete were selected. The finite element analysis software Abaqus is used to establish the finite element model of the temperature field of steel reinforced concrete columns, and the results are compared with the temperature results obtained from the overfire test to verify the validity of the model. Based on the overfire test of steel reinforced concrete columns, the seismic behavior of eight steel reinforced concrete columns was studied. The hysteretic curve and skeleton curve are obtained, and the crack development and ultimate failure pattern are studied. At the same time, the influences of fire time, axial compression ratio, steel content and stud on the hysteretic curve, skeleton curve, ductility, stiffness degradation and energy dissipation capacity of SRC columns are analyzed. It also provides experimental verification basis for the finite element model of seismic behavior of steel reinforced concrete columns after fire.
【学位授予单位】：北京建筑大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU398.9;TU352.11
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