Experimental and Analytical Studies on Damaging Properties of Ground Motions and Maximum Response Prediction of Reinforced Concrete Structures

在基于性能的抗震设计中，其理念是适当地评估结构的抗震需求和抗震能力，并在设计时考虑建筑物的性能。本文从能量反应的角度研究了地面运动的破坏特性和建筑物的反应行为。本研究的目的是提出对基于性能的设计有帮助的损伤评估方法。通过对地震过程中能量反应行为的研究发现，总输入能量、输入能量强度、能量输入持续时间等基于能量的指标可以对每种地震动的破坏特性进行评价和分类，因为能量反应与建筑物的破坏密切相关。提出了一种将地震输入能量对应于结构半周期内的耗散阻尼和滞回能量来预测结构非弹性反应位移的方法。在这种方法中，无需进行弹塑性反应分析，即可由弹性反应谱预测非弹性反应位移。由于这些能量值是与地震动的破坏性特性和建筑物的结构特性相关的，因此可以通过更精确的假设将这些特性更普遍地纳入预测过程或抗震设计。通过对不同持续时间的钢筋混凝土结构试件进行拟动力加载试验和振动台试验研究，从试件的最大反应位移、循环反应次数、耗能性能等非弹性反应行为来评价不同时程的钢筋混凝土结构试件的损伤特性的差异。计算结果表明，该方法基本适用于最大响应位移的简单预测方法。

In the performance based earthquake resistant design, the concept is to evaluate appropriately seismic demand and resistant capacity of structures, and to design with considering the performance of buildings. In this study, damaging properties of ground motions and response behavior of buildings are investigated in the viewpoint of energy response. The purpose of this study is to propose the damage evaluation method that can contribute to the performance based design.1. By studies of energy response behavior during earthquakes, it is found that energy based indices such as total input energy, intensity of input energy, duration time of energy input, can evaluate and classify the damaging properties of each ground motion, because energy response is related closely with the damages of buildings.2. A procedure to predict inelastic response displacement of structures by corresponding earthquake input energy to structural dissipated damping and hysteretic energy during a half cycle of response, is proposed. In this procedure, inelastic response displacement can be predicted from elastic response spectrum without inelastic response analysis. Because these energy values are related damaging properties of ground motions and structural properties of buildings, such properties can be taken into prediction procedures or earthquake resistant design more generally by more precise assumptions.3. From the studies of pseudodynamic loading test and shaking table test of reinforced concrete structure specimens subjected to ground motions with different time duration, the differences of damaging properties of ground motion are evaluated by the inelastic response behavior of specimens, such as maximum response displacement, numbers of cyclic response, energy dissipating behavior. And it is found that proposed procedure is considered to be almost suitable as simple prediction method of maximum response displacement.