Load and resistance factor design of shallow foundations against bearing failure
Load and resistance factor design of shallow foundations against bearing failure
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DOI：
10.1139/t08-061
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发表时间：
2008-10
影响因子：
3.6
通讯作者：
G. Fenton;D. V. Griffiths;Xianyue Zhang
中科院分区：
文献类型：
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作者：
G. Fenton;D. V. Griffiths;Xianyue Zhang
浅基础设计通常由沉降（正常使用极限状态）或承载力（极限状态）控制。虽然岩土工程师已经针对这些极限状态设计了超过半个世纪，但直到最近，他们才开始转向基于可靠性的设计。目前，基于可靠性的设计规范通常是通过与传统的工作应力设计进行校准而得出的。为了充分利用基于可靠性的设计的潜力，该行业必须超越校准，并以合理的方式考虑岩土工程的不确定性。本文提出了一种荷载和抗力系数设计（LRFD）的条形基础的承载力设计方法，使用荷载系数指定的结构规范。实现可接受的故障概率所需的阻力系数估计为土壤的空间变异性的函数，并通过“理解”的土壤p…
Shallow foundation designs are typically governed either by settlement, a serviceability limit state, or by bearing capacity, an ultimate limit state. While geotechnical engineers have been designing against these limit states for over half a century, it is only recently that they have begun to migrate towards reliability-based designs. At the moment, reliability-based design codes are generally derived through calibration with traditional working stress designs. To take advantage of the full potential of reliability-based design the profession must go beyond calibration and take geotechnical uncertainties into account in a rational fashion. This paper proposes a load and resistance factor design (LRFD) approach for the bearing capacity design of a strip footing, using load factors as specified by structural codes. The resistance factors required to achieve an acceptable failure probability are estimated as a function of the spatial variability of the soil and by the level of “understanding” of the soil p...