ABSTRACT

The effect on seismic demand of the soil-foundation compliance is investigated for a reinforced concrete frame building representative of Italian constructions from the 1970s. Design accounts for regulations, materials, preferred structure and foundation layouts and analysis methods of the period. Inelastic response history analysis for multiple motions at three intensities is carried out. For the compliant-base case, each foundation is replaced with a nonlinear inertial macro-element. Results suggest that the effect of interaction is minor, lower than expected from similar analysis on a new building, due to the larger degree of conservatism associated with foundation design in the considered period and the corresponding lower strength and stiffness of the superstructure.

摘要

研究了 1970 年代代表意大利建筑的钢筋混凝土框架建筑的土基顺应性对地震需求的影响。设计说明了该时期的法规、材料、首选结构和基础布局以及分析方法。对三种强度下的多次运动进行非弹性响应历史分析。对于柔顺基础案例，每个基础都被一个非线性惯性宏观元素所取代。结果表明，相互作用的影响很小，低于对新建筑进行类似分析的预期，这是因为在考虑期间与基础设计相关的保守程度较大，上部结构的强度和刚度相应较低。