有零应力区圆板基础地基反力精确求解方法

• 作 者: 龚节福
• 机 构: 四川电力设计咨询有限责任公司,
• 出 处: 特种结构
• 发表日期: 2016年02期
• 关键词: 应力区 圆板 精确求解 电子表格 圆板基础 地基反力 荷载工况 烟囱 计算公式 地基

圆板基础广泛应用于烟囱、风电场等场合。对于风机基础,在极限荷载工况下,地基容许出现25%的零应力区。对于容许出现零应力区的情况下,圆板基础地基最大反力和零应力区面积占比的计算较为繁琐。目前,工程设计时还没有准确快捷的方法解决该问题。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Exeel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。

Disc base widely used in chimneys, wind farms and other occasions. For fan foundations, under extreme load conditions, a 25% zero stress zone is allowed for the foundation. For the case of zero stress zone, the calculation of the maximum reaction force and the area of ​​zero stress zone on the foundation of the circular plate is more complicated. At present, there is no accurate and quick way to solve the problem when designing 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 maximal reaction force and zero stress area of ​​the foundation are calculated automatically by making Exeel spreadsheet. Through the verification of a large number of engineering cases, this method is accurate and convenient and can be used in practical projects.