Seismic Responses of a Concrete Cable-stayed Bridge Based on Damage Constitutive Model
This essay describes damage mechanism of concrete material and a ductile damage constitutive relationship is given based on irreversible thermodynamics. Then one general method to define the pseudo potential of damage process is discussed according to the generalized standard material model. The discrete elementary Euler-Lagrange equations of continuum damage mechanics are derived from action functional equation through a Gateaux differentiable form. The algorithmic functions of stress, strain and damage variable are supplied on the ground of discrete time step. Two-step map returning method (closest project point method) based upon implicit backward Euler scheme is expressed due to the stress updating operation, with plastic potential being equivalent to the yielding function. Plastic parameter and consistent tangent stiffness tensor is deduced which meet the convergent condition supposition and constitutive integral. A concrete highway cable-stayed bridges seismic damage behaviors are analyzed by using the previous approach.
seismic response cable-stayed bridge damage constitutive generalized standard material numerical algorithm
Chang-jiang Shao Qing-kai Kong
State Key Laboratory of Disaster Prevention in Civil Engineering, Tongji University, Shanghai 200092 Engineer, CCCC Highway Consultants Co., Ltd, Beijing, China
国际会议
第三届亚太国际工程中计算方法学术会议暨第五届全国工程中边界元、无网格等数值方法学术会议(ICOME2009)
南京
英文
1-7
2009-10-18（万方平台首次上网日期，不代表论文的发表时间）