【摘要】 基于能量结构地震弹塑性分析过程中,地震记录的强震持时是影响结构能量需求的重要指标。利用拟合设计反应谱的人工地震记录、对实际记录进行调整后与设计谱相匹配的地震记录以及实际地震记录,对不同滞回模型和不同自振周期的弹塑性单自由度结构体系以及按现行规范设计的12层钢筋混凝土框架结构进行弹塑性时程分析。通过分析5种不同类型的强震持时指标与结构总输入能、滞回耗能、阻尼耗能以及构件耗能之间的相关性,得到了与结构能量响应相关性较高的强震持时指标。结果表明,一致持时指标与各能量项之间的相关性较高,因此,进行能量分析时可选择一致持时作为参考指标。更多还原

【Abstract】 Strong motion duration of earthquake records is an important factor affecting the energy demand of the structure in the energy elastic-plastic analysis.Artificial records,spectral matched records by scaling and adjusting the real accelerograms and real strong motion records are used to analyze single-degree-of-freedom structures with different hysteretic model and vibration period,and inelastic time history analysis based on energy response for a 12-story reinforced concrete moment frame designed according to the present code is also conducted using these records.Through correlation calculation among five types of strong motion duration indices and structural input energy,hysteretic energy,damping energy and components energy,the strong motion duration index which has higher correlation with structural energy demand is found.The results show that the uniform duration has higher correlation than other indexs.Accordingly,the uniform duration can be selected as the reference index when energy analysis will be carried out.更多还原