摘要
高水头河床式水电站进水口坐落于下部大体积混凝土上,结构受力比较复杂。依据不同的边界条件假定,建立4种受力模型,并用三维有限元法进行了进水口结构模拟计算。结果表明:模型1计算得到的闸墩前沿最大竖向拉应力约是其他模型计算结果的10倍;不同力学模型对进水口下游挡水墙水平拉应力分布规律和量值影响较小;假定进水口与下部大体积结合部位为固端约束的悬臂梁力学模型,不宜用来计算高水头河床式水电站进水口结构应力和变形。
The intake of a high-head riverbed hydropower station is located on the lower mass concrete,and the structural stress is complex.According to different boundary condition assumptions,four mechanical models are established,and the simulation calculation is carried out by three-dimensional finite element method.The calculation results show that the maximum vertical tensile stress at the front of the gate pier calculated by model 1 is about 10 times that of other models;different mechanical models have little influence on the distribution law and magnitude of the horizontal tensile stress of the retaining wall downstream of the water intake;the mechanical model assuming that the joint between the water intake and the lower mass concrete is the cantilever beam with fixed end restraint is not suitable for calculating the structural stress and deformation of the water intake of a high-head riverbed hydropower station.
作者
石广斌
胡兴伟
段彬
李明乐
SHI Guangbin;HU Xingwei;DUAN Bin;LI Mingle(Xi'an University of Architecture and Technology, Xi'an 710055,China;PowerChina Northwest Engineering Corporation Limited, Xi'an 710065,China)
出处
《西北水电》
2022年第2期8-12,共5页
Northwest Hydropower
基金
国家自然科学基金资助(51904220)
陕西省创新能力支撑计划-创新团队(2020TD-005).
关键词
河床式水电站
高水头
进水口结构
力学模型
riverbed hydropower station
high head
intake structure
mechanical model
