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在双向偏心受压情况下矩形基础的计算目前还没有可靠的计算公式,《建筑地基基础设计规范》~([1])也未涉及双偏压问题。目前,工程设计时还没有准确快捷的方法解决该问题。而在实际工程中,尤其在地质条件较好的低矮建筑结构中,在保证结构安全的条件下,允许出现一定的零应力区对提高工程经济效益有显著的影响。针对此情况,采用积分应力体积求和的方法推导出准确的计算公式,然后通过制作Excel电子表格自动计算地基最大反力和零应力区面积占比。通过大量工程案例的验证,此方法准确便捷,可用于实际工程。
At present, there is no reliable calculation formula for the calculation of the rectangular foundation under the bi-directional eccentric compression. The double-bias problem is not involved in the Code for Design of Foundation of Building Foundation (1). At present, there is no accurate and quick way to solve the problem when designing the project. However, in practical engineering, especially in the low-rise buildings with better geological conditions, under the condition of ensuring structural safety, allowing a certain zero-stress zone to have a significant impact on improving the economic benefits of the project. In view of this situation, the accurate calculation formula is deduced by the method of integrating the stress and volume, and then the maximum reaction force and the area of zero stress in the foundation are calculated automatically by making Excel spreadsheet. Through the verification of a large number of engineering cases, this method is accurate and convenient and can be used in practical projects.