摘要
反拱型底板的稳定性是实现消能防冲的关键所在,其受力过程表现为一种高度的非线性.为此,采用AN-SYS程序中三维非线性弹簧单元模拟锚固钢筋的黏结滑移,接触单元模拟水垫塘底板结构之间的接缝以及底板、拱座与基岩之间的接触面,建立反拱型水垫塘的有限元模型,通过长潭岗水垫塘的工程实例说明了该模拟方法的合理性,并应用该方法对拟建的拉西瓦反拱型水垫塘进行稳定性分析,结果表明,反拱型底板具有较好的受力条件,其稳定性能够得到保证.
The stability of counter-arched slab is the key to success or failure of energy dissipation, as its stress procedure is considerably nonlinear. The bond-slip of anchor bar was simulated by using three-dimensional nonlinear spring elements, and the contact elements were used to simulate the slot between the slabs and the interface among the slabs, abutment and foundation. Then the counter-arched plunge pool was analyzed with finite element method, which was validated through the case of Changtangang plunge pool. Furthermore, the stability analysis of Laxiwa counter-arched plunge pool was carried out by the proposed method. The result shows that the counter-arched slab has good stress condition and its stability can be ensured.
出处
《天津大学学报》
EI
CAS
CSCD
北大核心
2007年第5期536-541,共6页
Journal of Tianjin University(Science and Technology)
基金
国家自然科学重点基金资助项目(50379033
50539060)
新世纪优秀人才支持计划资助项目
关键词
水垫塘
反拱型底板
三维非线性弹簧单元
接触单元
稳定性分析
plunge pool
counter-arched slab
three-dimensional nonlinear spring element
contact element
stability analysis