型钢高强混凝土框架柱抗震性能研究

发布时间：2018-06-28 18:47

本文选题：HSRC框架柱 + 低周反复加载　；参考：《重庆大学》2013年博士论文

【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。
[Abstract]:Steel reinforced high strength concrete (HSRC) structure is a composite structure of high strength concrete with steel and steel bars, which can meet the needs of the development of modern engineering structures towards the direction of long span, high rise and heavy load. In this paper, the seismic behavior of HSRC frame columns under low cyclic loading is studied by means of experiment, theoretical analysis and finite element simulation analysis. The restoring force model and the effect of flange bolted nails on the seismic performance of HSRC frame columns are studied in this paper. In this paper, according to the project of Chongqing Construction Committee, "Application study of stiffened skeleton high-strength concrete structure" (No. 25 of City Science word 2004), the main research contents and results are summarized as follows: 1. 19 low-cycle concrete structures are added repeatedly. Experimental study on HSRC frame columns with concrete strength grade of 69.9 ~ 84.4 MPA under loading, The failure process and failure pattern of HSRC frame column are observed, the hysteretic curve of HSRC frame column is obtained, the results of skeleton curve, ductility ratio, energy consumption index and so on are obtained, and the steel content, axial compression ratio and hoop ratio are analyzed. The influence of shear span ratio and concrete strength on the seismic behavior of steel reinforced high strength concrete frame columns is discussed. 2 based on the experimental study, the low cycle inversion of steel reinforced high strength concrete frame columns is established by means of experimental fitting method. The model of restoring force under complex load. 3. The horizontal load-displacement curve of steel reinforced high strength concrete frame column subjected to low cycle repeated loading is analyzed by ANSYS. The theoretical analysis results are in good agreement with the experimental results. The influence of various parameters on the seismic behavior of HSRC frame columns is theoretically analyzed. 4 based on the experimental results, the bond cracking failure strength of HSRC compression and bending shear members is studied and a simplified formula for calculating bond cracking failure strength is derived. The calculation method of flexural strength is studied, and the safety of calculation formula of flexural strength of relevant code [8] is verified, and the relation between ductility coefficient and various parameters is studied. A simplified formula for ductility coefficient of HSRC compression-bending shear members is derived. (5) A comparative experimental study of five steel reinforced high strength concrete frame columns with low cycle repeated flange loading with the same studs is carried out. The influence of flange bolting on the failure pattern, hysteretic curve, skeleton curve, ductility coefficient and energy dissipation index of steel reinforced high strength concrete frame column is analyzed. The conclusion that flange bolting can effectively improve the seismic behavior and ductility of steel reinforced high strength concrete frame columns under the same conditions is obtained. 6 HSRC with different forms and numbers of studs by six low cycle repeated loading flanges Frame column contrast test, The reasonable pin arrangement of section steel flange is put forward. It is proposed that the ductility coefficient and energy dissipation performance of HSRC frame columns with low steel content can still reach or exceed that of HSRC frame columns with high steel content as long as the pins are properly arranged. In order to meet the use of functional requirements and seismic performance requirements in the case of saving steel.
【学位授予单位】：重庆大学
【学位级别】：博士
【学位授予年份】：2013
【分类号】：TU352.11;TU398.9

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