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，其概念是合理地评估结构的抗震需求和抗震能力，并考虑建筑物的性能进行设计。本研究从能量反应的观点探讨地震动的破坏特性及建筑物的反应行为。本研究的目的是提出一种损伤评估方法，为基于性能的设计提供参考.通过对地震能量反应行为的研究，发现地震能量反应与建筑物的破坏密切相关，基于能量的指标如总输入能量、输入能量强度、输入能量持续时间等可以对各种地震动的破坏特性进行评价和分类.本文提出了一种利用半周期内结构的耗能和滞回耗能来预测结构非弹性反应位移的方法。该方法无需进行非弹性反应分析，即可由弹性反应谱预测非弹性反应位移。由于这些能量值与地震动的破坏特性和建筑物的结构特性有关，因此这些特性可以通过更精确的解释更普遍地应用于预测程序或抗震设计中.通过对钢筋混凝土结构试件在不同时程地震作用下的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特性来评价地震动破坏特性的差异。计算结果表明，该方法几乎可以作为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.