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(1 金地集團上海公司，上海 201802； 2 上海電力學院，上海 200090)

［摘要］受雙向偏心荷載作用的柱下獨立基礎，當基礎底面與地基脫開時，傳統(tǒng)的設計方法難以計算其基底壓力，基礎尺寸設計偏保守。通過分析地基反力的基本圖形，建立了對應不同偏心距的基底應力計算模型，推導了基底應力和零應力區(qū)面積比例的計算公式，編制了可快速求解的設計圖表。分析表明，采用新的允許出現(xiàn)零應力區(qū)的設計方法，雙向偏心受壓基礎的安全性和經(jīng)濟性均有較大提高。

［關(guān)鍵詞］柱下獨立基礎；雙向偏心受壓；基底壓力

Foundation pressure of rectangular footing under bidirectional eccentric loads

Du Minggan¹, Deng Shasha²(1 Gemdale Corporation(Shanghai),Shanghai 201802,China; 2 Shanghai University of Electric Power,Shanghai 200090,China)

Abstract:For the bidirectional eccentric foundation,traditional design method is difficult to calculate the foundation pressure when the bottom surface is detached from the ground.The foundation size is conservative.Based on the analysis of the subgrade reaction graphics,the foundation pressure models corresponding with different eccentricities were established.The formulas of foundation pressure and zero-stress zone percent were derived,and then the design charts were presented.The analysis shows that the security and economy of bidirectional eccentric foundation can be improved greatly when the new method of considering zero-stress zone is adopted.

Keywords:independent column foundation; bidirectional eccentric loads; foundation pressure

作者簡介：杜明干，碩士，工程師，Email:dujunang@126.com。

參考文獻

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