【作者】 蒋志刚； 张林峰； 喻飞； 戴小鹏；

【Author】 ZHANG Li-feng, JIANG Zi-gang, YU Fei, DAI Xiao-peng (Computer and Communication institute of Hunan University, Changsha 410082) (Artificial Intelligence Institute of Zhejiang University, Hangzhou 310027)

【机构】 湖南农业大学计算机与信息工程学院；

【摘要】 近年来,基于非线性连续介质力学原理的有限元分析有很大的发展,可以包括所有非线性因素, 结合等参元的应用,能得出统一的一般非线性分析的表达式,有着广泛的应用前景。本文采用Total Lagrange格式建立三维实体单元几何非线性有限元方程,引入广义三维实体单元和三维退化单元方法, 套用三维实体单元的Total Lagrange有限元格式可直接分析索拱结构的稳定问题。更多还原

【Abstract】 This paper presents an elastic nonlinear bucking analysis a kind of steel structure hybridized by L-section arch and tensile cables. The effects of cables on the instability behavior in the plane of the hybrid structure is investigated theoretically by using the larger deflection finite element approach in conjunction with the arc-length method and Total Lagrange iteration. A full load-displacement equilibrium path is obtained, including prebucking andpost-bucking equilibrium path. It is found that the cables affect significantly the structural behavior, including its limit load-carrying capacity and its load-displacement paths. Furthermore, the effects of boundary condition and rise-span ratio on the limit load-carrying capacity are also involved in the theoretical investigation. Some conclusions to the design of the cable-arch structures are drawn from the numerical results obtained in the study.更多还原