摘要
通过建立山体、回填混凝土以及进水口塔群三维网格模型进行有限元分析,基于子程序成功开发了4节点单自由度用户单元,较好地模拟了动水压力与结构之间的相互作用,并采取振型分解反应谱法进行动力分析,对塔群结构和地基的应力及变形分布规律进行分析研究。通过进水塔结构、地基应力及位移等计算结果,论证塔体的结构稳定性及安全性,并对阿尔塔什水电站联合进水塔群结构进行应力配筋计算以及地基承载力验算。结果表明:对于基础是变截面的塔体底板,上表面的应力控制工况为运行期,下表面控制工况是检修期;对于基础为非变截面的塔体底板,应力控制工况为检修期。两侧边墙应力控制工况为运行期+横竖向地震;后胸墙及中墩应力控制工况为运行期+纵竖向地震。依此,为今后联合进水口塔群结构稳定与配筋计算提供借鉴。
Through establishing the mesh model of mountain,backfill concrete and the intake tower group for carrying out finiteelement analysis,the 4-nodes single freedom user-defined element is successfully developed based on the subprogram,andthen the interaction between hydrodynamic pressure and the structure is better simulated,while the tower group structure as wellas the foundation stress and deformation distribution law are studied and analyzed through the dynamic analysis made with themode-superposition response spectrum method. The stability and safety of the tower body are demonstrated in accordance withthe calculation results of the intake tower structure,foundation stress and deformation,etc.,furthermore,the stress calculationof reinforcement and the checking calculation of the foundation bearing capacity are carried out for the structure of the joint-in-take tower group of Altash Hydropower Station. The result shows that the upper surface stress dominated working condition is theoperation period and the lower surface stress dominated working condition is the maintenance period for the foundation with thetower body bottom slab of a variable cross-section,while the stress dominated working condition is the maintenance period forthe foundation with the tower body bottom slab of a non-variable cross-section. Additionally,the stress dominated working condi-tion for both the side walls is the operation period plus horizontal and vertical earthquake;the stress dominated working conditionfor both the back breast wall and the intermediate pier is the operation period plus longitudinal and vertical earthquake. On the basis of this,a reference can be provided for the calculation of the stability and reinforcement of the structure of joint-intake tow-er group in the days to come.
出处
《水利水电技术》
CSCD
北大核心
2018年第S1期64-72,共9页
Water Resources and Hydropower Engineering
关键词
高地震烈度区
静力分析
动力分析
联合进水口塔群
应力配筋
阿尔塔什水电站
新疆
high intensity seismic region
static analysis
dynamic analysis
joint-intake tower group
stress reinforcement
Altash Hydropower Station
Xinjiang
