【作者】 冯宏；

【导师】 李正良；

【作者基本信息】 重庆大学 ， 工程力学， 2013， 博士

【摘要】 型钢高强混凝土（简称HSRC）结构是指高强混凝土的内部配置型钢和钢筋的组合结构，能满足当代工程结构向大跨、高耸、重载方向发展的需要。本文主要通过试验、理论分析及有限元模拟分析，研究HSRC框架柱在低周反复荷载作用下的抗震性能、恢复力模型以及翼缘加栓钉对其抗震性能的影响。本文结合重庆市建设委员会项目《劲性骨架高强混凝土结构应用性研究》（城科字2004第25号），主要研究内容及成果概括如下：①进行了19根低周反复加载作用下混凝土强度等级为69.9~84.4MPa的HSRC框架柱的试验研究，观察了HSRC框架柱的破坏过程及破坏形态，获得了HSRC框架柱的滞回曲线，从而得到了HSRC框架柱的骨架曲线、延性比、耗能指标等结果；分析了含钢量、轴压比、配箍率、剪跨比及混凝土强度等因素对型钢高强混凝土框架柱抗震性能的影响。②在试验研究的基础上用试验拟合法确定了建立了型钢高强混凝土框架柱低周反复荷载作用下的恢复力模型。③利用ANSYS对低周反复加载的型钢高强混凝土框架柱的水平荷载—位移曲线进行分析，理论分析结果与试验结果吻合较好；理论分析了各参数对HSRC框架柱抗震性能的影响。④在试验结果的基础上研究了HSRC压弯剪构件的粘结开裂破坏强度并推导了计算粘结开裂破坏强度的简化计算公式；研究了抗弯强度计算方法，验证了相关规范［8］抗弯强度计算公式的安全性；研究了延性系数与各参数的关系，推导了HSRC压弯剪构件的延性系数的简化公式。⑤进行了5根低周反复加载翼缘加相同栓钉的型钢高强混凝土框架柱对比试验研究，分析了翼缘加栓钉对型钢高强混凝土框架柱的破坏形态、滞回曲线、骨架曲线、延性系数、耗能指标等规律的影响，初步得到了翼缘加栓钉能有效提高同等条件下型钢高强混凝土框架柱抗震性能及延性的结论。⑥通过6根低周反复加载翼缘加不同形式和个数栓钉的HSRC框架柱对比试验，提出了型钢翼缘的合理栓钉布置形式。提出，只要栓钉布置得当，含钢量低的HSRC框架柱仍能达到或超过高含钢量的HSRC框架柱延性系数及耗能性能，从而达到在满足使用功能要求和抗震性能要求的情况下节约钢材的目的。更多还原

【Abstract】 Steel high-strength reinforced concrete(HSRC) structures which mainly consist ofshaped steels and high-strength concrete meet the contemporary need of span, heightand capacity. This paper based on experimental research and theoretical analysis andfinite element analysis, studied the seismic performance of HSRC columns under lowcyclic reversed loading. A restoring force model had been established and the influenceof flanges with studs had been studied. The scientific project of Chongqing constructioncommission was considered in this paper, and the follows are the research results:①For obtaining the parameters of HSRC columns, a cyclic loading experimentcontaining19test specimens(strength grade covered69.9-86.6MPa) were conducted.Such parameters include failure modes, hysteretic curve, skeleton curve, ductility ratioand capability of energy dissipation. Based on the experiment, the influence of differentfactors-such as steel content, axial compression ratio, stirrup ratio, shear span ratio andconcrete strength-were investigated.②A restoring force model for HSRC columns had been established by fitting thetest data of the cyclic loading experiment.③The finite element analysis(FEA) of the columns under cyclic loading matchedwith the test results. A parameter analysis was conducted with this FEA model.④A simplified calculation formula for bond-failure strength of HSRC wasderived by the test results. Calculation method of bending strength was studied, thesafety of this method was compared with the method in relative code[8]. The sensitivityof parameters towards ductility coefficient was shown in this paper. A simplifiedcalculation formula for compression and bending and shearing of HSRC members wasobtained.⑤A contrast test containing5specimens for the influence of flanges with studswas conducted under cyclic loading. The result came to a conclusion that flanges withstuds obviously increased the hysteretic curve, skeleton curve, ductility ratio andcapability of energy dissipation of HSRC columns.⑥The optimum form of studs was obtained by a contrast test of6differentarrangement forms of studs. The test results illustrated that a HSRC column with lowsteel content and optimum studs arrangement showed a seismic performance as good asHSRC columns with steel content at normal level. This means that studs in flanges could save steel in structures.更多还原