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为了全面研究钢-混凝土组合框架结构的抗震性能,对某典型的15层组合梁-方钢管混凝土柱框架结构进行了参数分析,讨论了方钢管混凝土柱截面含钢率、楼板厚度和组合梁钢梁高度变化对结构抗震性能的影响规律。分析结果表明:结构的周期和弹性位移反应受组合梁钢梁高度影响最为显著,含钢率的影响次之,随着钢梁高度和截面含钢率的增大,结构周期及弹性位移反应均有不同程度的降低;结构初始刚度和极限承载力受楼板厚度影响最为显著,钢梁高度影响次之,随着楼板厚度的增加和钢梁高度的增大,结构初始刚度均有不同程度的提高;结构的弹塑性位移反应受钢梁高度影响最大,钢梁高度增大,结构弹塑性位移反应明显降低。根据参数分析的研究结果,对不同的设计参数对结构抗震性能的影响有一个简单、直观的印象。在进行结构设计时,根据结构性能的具体需要,基于参数分析的结果,通过对结构参数进行有针对性的调整,从而更加快速、准确地优化结构设计。
In order to comprehensively study the seismic performance of steel-concrete composite frame structure, the parameters of a typical 15-layer composite beam-square steel tube concrete column frame are analyzed. The steel sections, concrete thickness and composite beam steel Influence of beam height variation on seismic behavior of structures. The analysis results show that the cyclic and elastic displacement response of the structure is most significantly affected by the height of the beam, and the influence of the steel rate is the second. With the increase of the height of the beam and the steel content in the section, both the structural period and the elastic displacement response The initial stiffness and ultimate bearing capacity of the structure are affected by the thickness of the slab, the height of the steel beam is the second, with the increase of the thickness of the slab and the height of the steel beam, the initial stiffness of the structure increases in varying degrees The elastic-plastic displacement response of the structure is greatly affected by the height of the steel girder, and the height of the steel girder increases. The elastic-plastic displacement response of the structure is obviously reduced. According to the results of parametric analysis, there is a simple and intuitive impression of the influence of different design parameters on the seismic performance of structures. In structural design, according to the specific needs of structural performance, based on the results of parametric analysis, the structure parameters can be adjusted more quickly and accurately to optimize structural design.