点击次数：

论文类型：期刊论文

发表时间：2020-09-01

发表刊物：IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY-TRANSACTIONS OF CIVIL ENGINEERING

收录刊物：SCIE

卷号：44

期号：3

页面范围：813-824

ISSN号：2228-6160

关键字：Multi-rib T-beam; Self-equilibrium conditions; Shear lag effect; Shear deformation; Energy-variation principle; Warping stress

摘要：To accurately calculate the shear lag amplitude of multi-rib T-beam (MRTB) with various flange widths, multi-longitudinal displacement differential functions considering the axial self-equilibrium conditions (SECs) for shear lag warping stress, shear stress lag and shear deformation of MRTB are set. Further, a new warping displacement model of MRTB is employed to meet the axial SECs for shear lag warping stress. Based on the energy-variation principle, the governing differential equations of the generalized displacement and the corresponding natural boundary conditions of MRTB are established. Through the calculation examples, the contribution of SECs, shear lag and shear deformation to the normal stress on the flanges of MRTB are characterized. By finite element analysis, the calculated results are in good agreement with the numerical results, which demonstrates the effectiveness of this proposed approach. Hence, it provides a more accurate method for the static analysis of MRTB.