【摘要】 反复荷载作用下混凝土结构的累积损伤将加重其力学性能的劣化,实用的结构累积损伤评价模型,可以定量确定结构的剩余刚度和强度,为结构安全评估和修复加固提供理论依据。本文以结构在理想无损伤状态下外力所作的功为初始标量,依据能量耗散原理,提出反复荷载作用下结构累积损伤评价模型。应用该损伤模型结合试验数据分别对L形截面柱、异形柱框架节点和异形柱框架结构进行了累积损伤分析,所得到的损伤评价指标,能较好地反映在反复荷载作用下钢筋混凝土结构的累计损伤状态。更多还原

【Abstract】 The mechanics performance of RC structure will deteriorate due to cumulated damage under cyclical loading.An applied estimating model of structural cumulated damage not only can ascertain the damage assessment and residual capability quantitatively but also provide theoretical evidence of safety evaluation and rehabilitation.A damage estimating model of RC structure based on the theory of energy dissipation was derived;it was assumed that the initial scalar was the work done by cycle load under ideal non-damage state.With the derived damage estimating model,the cumulated damages were analyzed for L-shaped columns,joints of special columns-beam frame and RC special columns frame structure according to experimental data.The analytical results and damage estimating indexes indicate cumulated damage state of RC structures with special columns under cyclic loading.更多还原