钢筋混凝土底层柔性结构的需求变形能力

Required deformation capacity of reinforced concrete piloti buildings

本文提出用累积延性系数评价底层柔性结构的底层需求变形能力,并根据地震时能量守恒关系推导了底层需求变形能力计算公式,然后对多质点体系使用实际地震加速度记录进行弹塑性响应分析,并与上述公式的计算结果进行比较。结果表明,本文提出的计算公式能够较好并安全地预测底层柔性结构的需求变形能力。

In this paper, a method is proposed for using accumulated ductility coefficient to evaluate the required deformation capacity of reinforced concrete piloti buildings. Based on the relationship of energy conservation during a major earthquake, a formula is deduced for calculating the required deformation capacity of the soft-first story. In order to affirm the calculation results, an elasto-plastic analysis was carried out for a multi-degree of freedom system subjected to some actual earthquake ground motions. The calculation results from the formula were compared with the analysis results. The conclusions show that the proposed formula can well and safely predict the required deformation capacity of the piloti buildings.