桩基础在分层弹性地基场地土扭转波作用下的扭转地震反应分析

THE TORSIONAL SEISMIC RESPONSE ANAL YSIS FOR THE PILE FOUNDATION UNDER THE ACTION OF TORSIONAL WAVE OF THE LAYEREID ELASTO-FOUNDATION SOIL

摘要:

本文对分层弹性地基中单桩基础通过特性分析,建立了合理的力学模型,按分层弹性地基土模型对桩进行扭转振动分析,给出了桩基础扭转自振特性及在扭转地震载荷与扭转振动载荷作用下的强迫反应解析解,文中的解析公式为分层弹性地基中的桩基础扭转地震反应分析提供了一种新的解析方法。

Abstract:

In this paper,the reasonable mechanics model are established for single pile foundation in layered elastic ground by means of characteristic analysis,Then the torsional vibration analysis of the pile is carried out according to layered elasto-foundation soil model,thus the analytic solutions for the torsional free vibration characteristics and the coercion responses under the action of the torsional seismic loading and torsional vibration loading of the pile are given. The analytic formulas in the paper provide a new analytic method for the torsional seismic response analysis of the pile foundation in layered elastic ground.