基于有限元分析的地下洞室非杆件结构配筋

Reinforcement for non-member structure of underground cavern based on finite element analysis

基于有限元分析的应力图形法配筋,有限元分析与配筋过程相对独立,对复杂结构有很强的适应性.首先对问题域进行弹塑性损伤有限元分析,再由结点应力插值生成问题域内应力场,对配筋段自动生成配筋截面,利用插值应力场在截面上插值和积分以计算内力,结合结构形体与受力对应力、内力进行修正,基于内力结果在配筋截面上进行配筋计算,最后利用AutoCAD绘图接口输出图形.该方法高效、精确,方便了地下洞室复杂结构的配筋.

Stress graph reinforcement based on finite element analysis does well for complicated structure because finite element analysis and reinforcement are relatively independent.First,the finite element analysis is conducted for problem domain,from which stress field will be obtained by interpolation of nodal stress.The reinforcement section is generated automatically for domain considered,on which internal force can be obtained by interpolation and integral.The internal force is revised by considering shape and load.Reinforce for reinforcement section is based on internal force and output result is utilized on AutoCAD drawing interface.The methodology is efficient and accurate,making the reinforcement of complicated structure of underground caverns pretty convenient.