悬臂钢板的有限元模态分析与试验研究

模态分析用于确定结构的振动特性,它是谐响应分析、瞬态动力学分析及谱分析等其他动力学分析的起点。运用ANSYS软件对某悬臂钢板进行模态分析,得到悬臂钢板的前5阶固有频率和振型,并与试验得到的结果对比,确定悬臂钢板的振动特性,从而为以后研究各种实际结构振动提供了依据。

浅谈钢板桩在深基坑支护中的应用

以深圳市清辉路市政工程为例,通过对地质条件的分析和深基坑围护方案比选,确定采用悬臂钢板桩支护方案。讨论深基坑支护中悬臂钢板桩实施方法以及钢板桩支护结构施工便捷、节约材料的优点。

软弱破碎含水岩石中的斜井支护方法

赛什塘铜矿3250～3200m中段入风斜井下半部分位于含水破碎带中,斜井施工过程中出现多处大面积高冒顶。针对不同岩层,先后采用超前悬臂钢板护顶支护和组合钢拱架整体推入支护法,控制住了巷道顶板冒落,利用斜井履带式扒渣机出渣,保证了作业安全,达到了预期效果。

软弱破碎含水岩石斜井支护方法

赛什塘铜矿3 250~3 200 m中段入风斜井下半部分位于含水破碎带中,斜井施工至3 200 m水平时,大量裂隙水涌出,造成多处大面积高冒顶。根据不同岩层,先后采用超前悬臂钢板护顶支护和组合钢拱架整体推入支护法,控制住了巷道顶板冒落,利用斜井履带式扒渣机出渣,保证了作业安全,达到了预期效果。

复杂周围环境下和大面积回填土的边坡处理技术

针对处于复杂周围环境和大面积回填土条件下的某边坡开挖工程,采用悬臂式钢板桩进行支护,并运用Blum计算方法进行了设计;此外,为了进一步满足悬臂式钢板桩的稳定性和变形要求,对悬臂式钢板桩迎土面辅以卸载的施工措施。结果表明,此处理技术便于施工、节约成本、效果良好。

Bending Stresses of Steel Web Tapered Tee Section Cantilevers

Although commonly used, no design method is available for steel web tapered tee section cantilevers. This paper investigates the bending stresses of such beams. Relationships between the maximum compressive stress and the degree of taper were investigated. An analytical model is presented to determine the location of the maximum stress when subjected to a uniformly distributed load or a point load at the free end and was validated using finite element analysis and physical tests. It was found that the maximum stress always occurs at the support when subjected to a uniformly distributed load. When subjected to a point load at the free end and the degree of taper is up to seven, it was found that Miller＇s equation could be used to determine the location of the maximum stress. However, it is shown that when the degree of taper is greater than seven, Miller＇s equation does not accurately predict the location and the analytical model should be used. It was also found that the location of the maximum stress was solely dependent on the degree of taper, while a geometric ratio, fl was required to determine the magnitude of the maximum stress. A simple method that predicts the magnitude of the maximum stress is proposed. The average error in the prediction of the magnitude of the maximum stress is found to be less than 1.0%.