Relevance of Earthquake Ground Motion Characteristics with Damage of Reinforced Concrete Structures

Abstract eng:
One of the most important decisions in carrying out proper design is to select a design earthquake that adequately represents the ground motion expected at a particular site and in particular the motion that would drive the structure to its critical response, resulting in the highest damage potential. From the disasters of Off Tokachi Earthquake 1968 and Kobe Earthquake 1995, it is considered that the time duration plays an important role on the damage potential of the earthquake and pointed out that the behavior of structures is dominated by the characteristics of earthquake ground motions. The purpose of this study was to investigate the differences in the inelastic dynamic behavior of reinforced concrete structures subjected to earthquake ground motions with different characteristics. The variations were earthquake ground motions with different characteristics to ascertain damage potential of earthquake ground motions reflecting regional conditions such as oceanic earthquake and near fault earthquake. The study was also to develop techniques to estimate structural displacements which are an index of structural damage during strong earthquake ground motions. Damaging potential of earthquake ground motions, and hysteretic energy characteristics of reinforce concrete structure were evaluated by investigation of momentary energy response behavior, which is related to displacement behavior of structure, the maximum displacement response was estimated by energy method. Estimating method of maximum displacement of reinforce concrete structures during strong ground earthquakes was verified also by comparing with FEM method.

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