【作者】 符晓；

【导师】 杨敏；

【作者基本信息】 天津大学 ， 水利水电工程， 2004， 硕士

【摘要】 应用冲击射流的研究成果,详细地分析了水垫塘内淹没冲击射流的扩散规律和各射流区域主要物理量的变化特征。平底板的稳定主要靠自重和锚固钢筋维持,反拱形底板的稳定主要靠拱座和锚固钢筋维持,因此合理的锚固钢筋模拟方法对解决底板的稳定计算问题至关重要。本文对锚固钢筋的工作原理进行了研究,用几种锚固钢筋的模型对实际工程底板稳定问题进行了计算。利用ADINA程序中的接触模块处理底板与底板、底板与基岩、拱端与拱座之间的接缝,对“随机拱”与“整体拱”进行了非线性静力分析,得到了反拱形底板的拱端推力、锚固拉力、板块位移以及施工缝间的应力。结果表明,用接触问题处理底板之间、底板与基岩之间的缝隙以解决底板的计算问题是可行的。高拱坝泄洪时引起底板振动是典型的流固耦合问题,本文计算了底板块在动力荷载作用下的响应,并与模型试验与原型观测结果进行了对比研究。为了提高底板的整体、局部稳定性,对底板设置键槽。本文设计了三种底板形式,并对设置键槽底板与不设置键槽底板的位移和应力进行了对比研究,得出了合理的键槽形式,增加了板块的自锁作用,提高了底板的整体、局部稳定性,键槽缝隙内并未产生较大拉应力。另外,本文还对底板的曲率进行了研究。更多还原

【Abstract】 Based on the research result of impact jet flow, this paper analyzes the diffusion laws ofsubmersed slant jet flow, and introduces the variable characters of physical parameters inevery sub-region of jet flow in plunge pool.The stability of flat slab is largely depended on its gravity and anchor bars;otherwise,the stability of the reverse-arch-shape slab is depended on the abutment of arch supports andanchor. So it is significant to use reasonable simulation method of anchor to the solution ofslab problems. This paper performs the research on the operating principle of anchor, andcalculates the actual project problem using several finite element models.The contact module in the ADINA program is used to treat the joint problems of slab andslab, slab and foundation rock, arch abutment and arch support. The pushing force at archabutment, anchoring force, displacement of reverse-arch slab and the stresses of theconstruction joint are obtained by the use of calculation of non-linear static and dynamic of“random arch” and “integral arch”. The result indicates that it is feasible to treat the joint ofslab and foundation rock using the contact theory to solve the problem of slabs.The slab vibration caused by flood discharge from high-arch dam is the typicalfluid-solid interaction problem. The response of slabs under the action of dynamic load isstudied. The comparison with data of model experiment and prototype observation is done inthis paper.The key-slot is installed in the slab to increase the integral and local stability of slabs.Three types of key-slot are designed and the contrastive study on the displacement and stressare done in this paper. The reasonable key-slot form witch can increase the self-locking actionof slabs is obtained. There is no large tensile stress in the key-slot gaps. Besides, the curvatureof slabs is investigated in this paper.更多还原