基于子模型的碾压混凝土坝闸门井静动力分析

Static and Dynamic Analysis of the Gate Well of the Roller Compacted Concrete Dam Based on Sub-Model Method

碾压混凝土坝在动力作用下孔口部分容易应力集中,产生较大的拉应力,直接关系到坝体安全稳定性,而闸门井群布孔较多,纵深较大,是孔口应力分析的一个重要方面。利用孔口子模型,对某碾压混凝土坝的闸门井进行了静动力分析。结果表明:在设计静载+规范谱状态下,闸门井折角部位出现一定的拉应力;在设计静载-规范谱状态下,闸门孔附近均为压应力;在校核静载+规范谱状态下,顺河向正应力、竖向正应力和顺河向剪应力在闸门井折角处均出现了应力集中,顺河向正应力和竖向正应力均为拉应力。

The tensile stress concentration may be occurred near the gate well of the roller compacted concrete dam which may threaten thesafety of the dam. The static and dynamic analysis is a vital part of the safety of the dam for the complication gate wells and the length of thewells. In this paper the sub-model was used to analyze the stress of the gate well under the static and dynamic conditions. Then results showthat： within the design static load plus Gauge spectrum condition, the tensile stress is occurred at the corner of the gate well; within the de-sign static load minus Gauge spectrum, there is not tensile stress occurring. Within the checking static load plus Gauge spectrum condition,the normal stress along the river and the vertical normal stress are both tensile stress.