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本文通过江西赣江万安水利枢纽工程表孔溢流坝闸墩弧门钢筋砼支座模型试验,研究闸墩弧门支座在水平推力作用下的力学性能。试验研究的重点是弧门支座及其附近闸墩的钢筋和砼的应力应变分布规律,闸墩局部钢筋的配筋方式(扇形状和网状)和不同配筋数量对结构受力性能的影响。文章对弧门支座及其附近闸墩的破坏机理也进行了探索,提出了水工弧门钢筋砼支座的受力模型为悬吊拉杆拱。在试验研究的基础上初步提出了闸墩局部抗裂度与强度的计算方法,对比理论分析与试验结果,符合程度较好。
In this paper, through the model test of the reinforced concrete support for the pier-overflow dam of the Wanjiang water conservancy project in Wanjiang, Jiangxi Province, the mechanical properties of the gate pier arch support under horizontal thrust are studied. The focus of the experimental study is the stress and strain distribution of steel bars and concrete spurs on the arch support and its adjacent piers. The reinforcement of the squeezing piers (fan shape and mesh shape) and the number of different reinforcements affect the structural performance of the structure. influences. The article also explored the damage mechanism of the arch door and its adjacent piers, and proposed that the force model of the hydraulic arch door reinforced concrete support is the suspended tie rod arch. Based on the experimental study, the calculation method of the local crack resistance and strength of the piers was preliminarily proposed. The theoretical analysis and experimental results were compared and the degree of agreement was good.