摘要
介绍了分析框架结构滞回过程的柔度法,框架结构通常是采用基于位移形函数的刚度法进行非线性分析,但由于位移形函数假定了杆件内部变形与杆端节点位移的代数式关系,在荷载达到极限点附近时有较大误差。柔度法根据杆件内部力与节点力的平衡建立了内力形函数,在加载过程中结构和杆件始终满足力的平衡和协调条件,因而能够得到比刚度法更精确的结果。利用自编的框架结构柔度分析法程序对一榀钢筋混凝土平面框架进行了计算分析,结果与试验吻合较好。
Flexibility methods are used to analyze frame structures under load reversals. Normally, stiffness methods are adopted for the nonlinear analysis of frames, in which the hypothesis of an algebraic relationship between the nodal displacements and the inner section deformations gives out relatively large error near the limit point. Flexibility methods are based on force shape functions, which satisfy the equilibrium and harmony throughout the loading phases, and hence can obtain more exact results. By a frame analysis program using the flexibility methods, a plane RC structure is studied, and the calculating results coincide well with test results.
出处
《石家庄铁道学院学报》
2004年第4期34-37,共4页
Journal of Shijiazhuang Railway Institute
关键词
框架结构
滞回曲线
柔度法
frame structures, hysteretic curve, flexibility methods
