考虑土与结构相互作用的井塔抗震分析

Earthquake Analysis of Shaft-Tower in Consideration of Soil-Structure Interaction

根据波动理论与子结构方法,本文对井塔结构的地震响应分析提出了新的计算模型与分析方法。该模型按照结构的实际受力状态取为层状地基土-竖井-井塔相互作用结构体系,其中对竖井及土体的作用采用Novak阻抗函数。将本文方法计算的结果与某地工程实测数据作了比较,表明本文所提出的计算模型与分析方法能够较为准确地反映该结构体系的受力状态。

Based on the wave theory and substructure approach, this paper presents a linear interaction model for the system of layered soil-vertical shaft-hoist tower, in which the Novak's impedance function of embeded footing was used. The natural periods of vibration in two directions of three real systems calculated by this model indicate good agreement with the measured results. The earthquake response of the system is analyzed in the frequency domain by the Fast Fourier Transform and the results are compared with those of the systems on rigid-base.Based on the present paper, the computer program developed is quite efficient and has the advantage of saving storage.