【作者】 秦浩；

【导师】 李哲；

【作者基本信息】 西安理工大学 ， 结构工程， 2009， 硕士

【摘要】 异形柱框架能够节省空间,优化房间布置,减轻结构自重。但是由于钢筋混凝土异形柱框架是由截面不规则的异形柱组成,使钢筋混凝土异形柱框架的抗震性能较差。在高烈度地区异形柱框架房屋的高度受到严格限制,严重制约了钢筋混凝土异形柱框架的使用。为了能够发挥异形柱的优点,而且又能够推广使用,需要改进钢筋混凝土异形柱的抗震性能。因此本文主要研究在钢筋混凝土异形柱框架中加入型钢后的抗震性能。本文研究的主要内容和结论如下：1.采用有限元软件ANSYS模拟了与实际工程尺寸相同的一榀型钢混凝土异形柱框架。运用静力弹塑性方法,研究了框架的滞回性能,绘制出框架的骨架曲线,研究柱轴压比和型钢对框架抗震性能的影响。得出了以下结论：型钢混凝土异形柱框架满足“强柱弱梁”要求；荷载—位移滞回曲线呈梭形,滞回环饱满,具有良好的耗能性能；型钢混凝土异形柱框架的延性系数为3.47,具有良好的延性。通过对比分析可以看出型钢的加入能够显著提高钢筋混凝土异形柱框架的抗震能力和承载力。2.采用有限元软件ANSYS分别建立了三种对比模型。计算分析了钢筋混凝土异形柱框架和型钢混凝土异形柱框架；具有相同型钢含钢率的型钢混凝土矩形柱框架和型钢混凝土异形柱框架；具有等形心轴惯性矩的钢筋混凝土矩形柱框架、钢筋混凝土异形柱框架和型钢混凝土异形柱框架。运用振型分解反应谱法,研究了对比模型在水平地震作用下的地震反应特性。得出型钢混凝土异形框架柱的扭矩和框架层间位移都较小,钢筋混凝土异形柱框架加入型钢后抗震性能提高,为其在高烈度区的应用提供了可能性；具有等形心轴惯性矩的钢筋混凝土矩形柱框架、钢筋混凝土异形柱框架和型钢混凝土异形柱框架三种结构的框架柱扭矩和层间位移非常接近,具有相似的地震反应特性。3.采用有限元软件ANSYS建立了型钢混凝土异形柱框架模型。运用振型分解反应谱法,研究了柱型钢含钢率变化、柱截面变化和柱肢长变化对地震反应特性的影响。得出型钢含钢率对框架的地震反应影响不大：柱截面由角柱和边柱变为十字形柱对结构抗震有利；柱肢长改变将显著影响柱的内力和位移。运用动力时程分析方法,对比研究了柱型钢含钢率变化、柱截面变化和柱肢长变化时对地震反应特性的影响。更多还原

【Abstract】 Special-shaped column frame can save space, optimize arrangement of the room, lighten the structure’ quality.Because reinforced concrete special-shaped column frame was composed of irregular section columns, the seismic performance of frame is weak. Height of reinforced concrete special-shaped column frame was strictly limited in high intensity region, which restricted the development of special-shaped column frame. In order to popularize special-shaped column frame, seismic performance of reinforced concrete special-shaped column frame should be improved. Therefore this paper studied seismic performance of steel reinforced concrete special-shaped column frame. The main contents and conclusions are as-follows:The paper established real size model with finite element program named ANSYS.Using elastic-plastic methods, the paper drew hysteretic curve and skeleton curve, then studied influence of steel and axial compression ratio to seismic performance of frame. Conclusions are as follows:special-shaped steel reinforced concrete column frame satisfy the request that "power columns, weak beams". Hysteretic curve is chubby shuttle-shape,which testify nice seismic performance of special-shaped steel reinforced concrete column frame.the ductility coefficient of special-shaped steel reinforced concrete column frame is 3.47, which testify nice ductility of the frame.The paper established three contrastive models with finite element program named ANSYS and analyzed special-shaped RC column frame and special-shaped SRC column frame, common SRC column and special-shaped SRC column which have same steel ratio, common RC column, special-shaped RC column and special-shaped SRC column which have the same inertia moment. Then the paper studied their level seismic response performances. Seismic analysis of the former two contrastive models showed that torque of columns and story drift of special-shaped SRC column frame were both smaller which indicates seismic performance of special-shaped SRC column frame is better. Seismic analysis of the latter contrastive models show that torque of columns and story drift is close which indicates they have close seismic response performances.The paper established models with finite element program named ANSYS.Using mode-superposition method the paper studied the influence of steel ratio, column section and the length of column limb to seismic response performance of special-shaped steel reinforced concrete column frame. Conclusions are as follows:the influence of steel ratio to seismic response performance of the frame is little, it is helpful that L-shaped column was replaced +-shaped column, the influence of the length of column limb to seismic response performance of the frame is remarkable. Using time history method, the paper studied the time history curves of steel ratio, column section and the length of column limb and studied the influence to seismic response performance of special-shaped steel reinforced concrete column frame.更多还原