[最新文献]砂土和粘土上刚性矩形基础的弹性沉降分析[12/05/2020]
1 论文
Elastic Settlement Analysis of Rigid Rectangular Footings on Sands and Clays 砂土和粘土上刚性矩形基础的弹性沉降分析
Abstract: In this paper an elastic settlement analysis method for rigid rectangular footings applicable to both clays and sands is proposed. The proposed method is based on the concept of equivalent shape, where any rectangular footing is suitably replaced by a footing of elliptical shape; the conditions of equal area and equal perimeter are satisfied simultaneously. The case of clay is differentiated from the case of sand using different contact pressure distribution, whilst, additionally, for the sands, the modulus of elasticity increases linearly with depth. The method can conveniently be calibrated against any set of settlement data obtained analytically, experimentally, or numerically; in this respect the authors used values which have been derived analytically from third parties. Among the most interesting findings is that sands produce “settlement x soil modulus/applied pressure” values approximately 10% greater than the respective ones corresponding to clays. Moreover, for large Poisson’s ratio (v) values, the settlement of rigid footings is closer to the settlement corresponding to the corner of the respective flexible footings. As v decreases, the derived settlement of the rigid footing approaches the settlement value corresponding to the characteristic point of the respective flexible footing. Finally, corrections for the net applied pressure, footing rigidity, and non-elastic response of soil under loading are also proposed.
Keywords: elastic settlement; shallow foundations; rigid footings; contact pressure; equivalent shape
摘要：本文提出了一种适用于粘土和砂土的刚性矩形基础的弹性沉降分析方法。所提出的方法基于等效形状的概念，即任何矩形基础都可以适当地用椭圆形基础来代替，同时满足面积相等和周长相等的条件。粘土和砂的情况是用不同的接触压力分布来区分的，另外，对于砂来说，弹性模量随深度线性增加。该方法可以方便地根据分析、实验或数值获得的任何沉降数据进行校准；在这方面，作者使用了从第三方分析得出的数值。其中最有趣的发现是，砂产生的 "沉降x土模量/施加压力 "值比相应的粘土大10%左右。此外，对于较大的泊松比(v)值，刚性基础的沉降量更接近于相应的柔性基础角部的沉降量。随着v的减小，得出的刚性底板的沉降量接近于各自柔性底板特征点对应的沉降值。最后，还提出了对净施加压力、基础刚度和土体在荷载作用下的非弹性响应的修正。
2 相关文献
Note: '相关文献' 是按照Google的排序算法产生出来的.
[1] Principles of Foundation Engineering
[2] Shallow foundation II: safe bearing pressure and settlement calculation
[3] Elastic settlement of ring foundations
[4] Allowable Bearing Capacity and Settlement
[5] Settlement analysis methods: literature review
[6] An introduction to foundation engineering
[7] Foundations and retaining structures - Research and practice
[8] Consolidation and Settlement Analysis
[9] Foundation Settlements
[10] Introduction to Settlement and Volume Expansion in Soils
[11] Shallow Foundations — Settlements
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