支柱支撑式锥底罐抗风及抗震稳定性分析

装满储料时锥底罐主要承受轴向荷载,但当内部没有装料、部分装料或者在施工过程中,风压等横向荷载的作用不能忽视。同时,当遭到地震作用时,锥底罐更容易发生失稳破坏,风压和地震导致的锥底罐破坏事故在实际工程中时有发生。为了研究支柱支撑式锥底罐的稳定性,采用理论分析与数值模拟相结合的方法对锥底罐的抗风稳定性、抗倾覆稳定性、失稳稳定性和抗震稳定性进行了细致分析。结果表明:1在风荷载作用下,锥底罐最大应力出现在支柱与补强板接触部位,发生失稳首先出现在上部罐壁靠近罐顶位置处;2地震载荷作用下高应力区主要出现在锥底板、支柱位置和罐顶位置。因此在锥底罐设计与维护过程中,要重点考虑这些部位的强度和稳定性。

Analysis of the wind and seismic stability of column-supported conical bottom tank

When conical bottom tank filled with bulk material, it main suffer axial loads, on the other hand when there is no bulk material, partial bulk material or in the construction process, the role of lateral loads such as wind pressure cannot be ignored. Also, when earthquake occurred, the conical bottom tank is more prone to instability and failure, the tank damage accidents caused by wind pressure and earthquake occurred frequently in the actual project. In this paper, theoretical analysis and numerical simulation method are combined to study the column-supported conical bottom tank stability, wind - resistant stability, overturning resistant stability, buckling stability and seismic resistance stability are detailed analyzed. The results showed that: (1) under wind loads, the maximum stress is occurred in the column and reinforcement plate contact area, the instability first appears in the upper position of the tank wall near the top of the tank ;(2) under seismic loads, high stress is mainly occurred in the areas of conical bottom, column position and tank top position. Therefore, it is important to consider the strength and stability of these sites in the design and maintenance process of conical bottom tank.