钢筋混凝土典型杆单元的切线刚度矩阵

The Tangent Stiffness Matrix of Typical Element in R.C. Member System

本文利用筋混凝土杆件截面M-φ-N关系新的数学模型,推导了同时考虑物理非线性和P-△效应并计及钢筋与混凝土之间粘接滑移影响的杆件切线刚度矩阵,用此刚度矩阵对钢筋混凝土框梁柱单元进行了非线性分析,所得结果与试验结果吻合良好.

In this paper, based on the new mathematical model of moment-curvature-axial force (M-?-N) about R.C.cross section, the element stiffness matrix of typical R.C. member has been derived in which the material nonlinearity, P-Δ effect and bond-slip between the reinforcement bar and concrete are involved. The nonlinear analysis of R.C. frame column element has been developed by using the matrix, and a good agreement between the experimental results and calculated ones has been found.