水力式升船机单井塔柱内对拉钢索优化布置

单井型塔柱结构极大改善了水力式升船机竖井水位同步性问题,但随着提升高度增大,竖井内水深越大,侧壁位移、弯矩过大等问题更加突出。以150米级单井塔柱为例,提出了竖井内布置对拉钢索的设想和简化布置方案。基于钢索拉力权重分配系数的优化方法,取得了钢索等应力的密度分布最优解,并离散转化为等效的等荷载布置方案,可在实际工程中应用。经有限元模型结果对比分析,等荷载布置与简化方案相比,最大位移可减小47.44%,纵竖向弯矩极值差别不大。与无钢索方案比较,最大位移、纵向弯矩、竖向弯矩可分别减小93.5%、74.36%、75.84%。高强钢索预应力方案值得进一步研究。

Optimal layout of cable in single-well tower structure of hydro-floating ship lift

The single-well tower structure greatly improves the synchronicity of water level vertical shaft of the hydro-floating ship lift,but with the increase of the lifting height,the greater the water depth in the vertical shaft is,and the more prominent the problems of lateral wall displacement and the excessive bending moment become.Taking the 150-meter-class single well tower column as an example,this paper puts forward the assumption of opposite-tensile cable arrangement in the shaft and simplified cable arrangement scheme.Based on the optimization method of the weight allocation coefficient of cable tension,the optimal solution of the density distribution of cable equal stress is obtained,and the solution is discretized into the equivalent equal load arrangement scheme,which can be applied in practical engineering.The results of the finite element model show that the maximum displacement can be reduced by 47.44%in the equal-load layout compared with the simplified scheme,and there is little difference between the extreme values of the longitudinal and longitudinal bending moments.Compared with the cable-free scheme,the maximum displacement,longitudinal moment and vertical moment can be reduced by 93.5%,74.36%,and 75.84%,respectively.The prestressing scheme of high strength steel cable deserves further study.