The server is under maintenance between 08:00 to 12:00 (GMT+08:00), and please visit later.
We apologize for any inconvenience caused
Login  | Sign Up  |  Oriprobe Inc. Feed
China/Asia On Demand
Journal Articles
Laws/Policies/Regulations
Companies/Products
Numerical simulation of the releasing process of existing stress in concrete beam by drilling hole method
Author(s): 
Pages: 232-236
Year: Issue:  S1
Journal: Journal of Harbin Institute of Technology

Keyword:  预应力混凝土 现存应力 钻孔法 应力释放率 数值模拟;
Abstract: 本文采用基于Lagrangian理论的三维线性有限单元方法模拟了预应力混凝土内现存应力的钻孔法释放过程.通过外加载荷应力场模拟现存应力,用应力释放率描述释放规律,用单元生死技术模拟钻孔过程,研究了局部应力状态及应力水平、钻孔直径、钻孔间距等因素对弹性应力释放规律的影响.结果表明:应力释放值依赖于应力初值、钻孔直径和深度;完全释放深度随孔径增大而增大,但与应力初值无关;而用应力释放率和相对钻进深度(h/d)描述的释放曲线不受钻孔直径、释放区域的应力状态和初值变化的影响,具有广泛适用性.最后,通过试验验证了本文计算结果的正确性.
Related Articles
loading...