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首页> 外文期刊>Bulletin of earthquake engineering >Effects of nonlinear soil-structure-interaction on seismic damage of 3D buildings on cohesive and frictional soils
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Effects of nonlinear soil-structure-interaction on seismic damage of 3D buildings on cohesive and frictional soils

机译：非线性土结构 - 相互作用对三维建筑地震损伤的粘性和摩擦土壤

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摘要

The present paper investigates the impact of nonlinear soil-foundation-structure-interaction (NLSFSI) on the damage response of 3D R/C buildings supported on different soil types with varying flexibility. The main goal of the paper is to present a first approach towards the possible quantitative differentiation, with respect to fixed base conditions, on the overall damage level when NLSFSI effects are accounted for. To accomplish this purpose nine buildings with various heights and structural systems are studied. For the foundation of the buildings two different soil types are considered, namely cohesive and frictional ones. Moreover, the soil flexibility is taken into account by using two different values of the soil's shear wave velocity. The buildings are subjected to 65 bidirectional earthquake records, for which nonlinear time history analyses are conducted. The accelerograms of each record are scaled to two different seismic intensities corresponding to certain performance levels using appropriate scaling factors. The damage state of the buildings is expressed through the maximum interstorey drift ratio. The assessment of the results revealed that the role of soil-foundation-structure-interaction (SFSI) is not necessarily beneficial. In order to assess the SFSI effects a number of parameters are important as the frequency content of the earthquake ground motion, the building's structural system, the foundation soil flexibility as well as the earthquake intensity.
机译：本文调查了非线性土对地基 - 结构 - 相互作用（NLSFSI）对不同土壤类型支持的3D R / C建筑物的损伤响应的影响。本文的主要目的是展示关于固定基础条件的可能定量分化的第一种方法，当占NLSFSI效应时的整体损伤水平。为了完成这个目的，研究了具有各种高度和结构系统的九个建筑物。对于建筑物的基础，考虑了两种不同的土壤类型，即粘性和摩擦。此外，通过使用两种不同的土壤剪切波速值考虑土壤柔性。该建筑物受到65个双向地震记录，用于进行非线性时间历史分析。使用适当的缩放因子，每个记录的加速度缩放到对应于某些性能水平的两种不同的地震强度。建筑物的损坏状态通过最大的间隔漂移比表示。评估结果表明，土壤基础 - 结构 - 相互作用（SFSI）的作用不一定有益。为了评估SFSI效应，许多参数作为地震地面运动的频率内容，建筑的结构系统，基础土壤柔韧性以及地震强度。

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