bolt bar meaning in English

螺栓杆
驻栓

The main popular theoretical method adopted to study end - plate connection is finite element technique under monotonic loading at present . this paper applies nonlinear ( material , geometry and contact ) finite element method to analyze the behaviors of connections under cyclic load at fist time . contact elements are set between end plate and column flange , screw cap and neighborhood plane , bolt bar and hole
对于端板连接的理论分析，目前国内外的研究主要局限在单向加载有限元分析范畴，本文首次采用三维非线性(包括材料、几何与状态非线性)有限元对端板连接进行了循环加载分析，端板与柱翼缘间、螺栓头(帽)与相邻板件间、螺栓杆与孔壁间都设置了反映边界状态的接触单元。