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研究大跨度钢筋混凝土带腋撑框架(RCFD)结构在脉冲型水平地震作用下的弹塑性动力反应特性。采用3组25条集集地震动记录,通过实际工程结构简化的二维平面大跨度RCFD结构的弹塑性动力时程分析,比较了脉冲型和非脉冲型地震作用下结构层间位移和基底剪力反应的差别,分析了地震动脉冲指数和结构体系参数对结构地震水平位移反应的影响。分析结果表明:地震动脉冲指数对RCFD结构位移反应的影响更显著,层间位移能力需求更高;地震动脉冲特性越强,RCFD结构位移反应越大,体系参数对结构脉冲型地震动反应有重要影响。
The elasto-plastic dynamic response of long-span reinforced concrete arched frame (RCFD) structures under impulsive horizontal seismic loading is studied. Based on the elasto-plastic dynamic time-history analysis of two-dimensional planar long-span RCFD structures with three structural sets of 25 earth-quake-ground motions, the displacement of the structural layers and the relationship between the substrate shear The difference of force response is analyzed. The influence of earthquake pulse index and structural system parameters on the horizontal displacement response of structural earthquakes is analyzed. The results show that the index of ground motions has a more significant influence on the displacement response of RCFD structure and the demand of interlayer displacement ability is higher. The stronger the pulse characteristics of ground motions, the larger the displacement response of RCFD structure. The response of system parameters to the impulsive ground motion response of structure Significant influence.