已有钢筋混凝土构件的动态可靠指标

摘要

在同时考虑混凝土损伤和钢筋损伤及材料强度随时间劣化的情况下,提出了服役钢筋混凝土结构强度和刚度经时变化模型,并求得动态可靠指标,使得可靠性鉴定结果更加明确、科学.文中给出了T型截面受弯构件经时抗力公式.工程实例验证了本文方法的正确性.%Considering concrete damage and reinforcing bar damage and time-dependent deterioration on the materials' strength at the same time. The time-dependent models of the strength and stiffness on existing reinforced concrete structure are put forward. Dynamic reliability index is calculated, so that results of reliability appraisal become more clear and reasonable. The formula of time-dependent resistance on the T-type member in flexure is given. The engineering example is given to illustrate the correctness of the method.