Study on Static Elasto-Plastic Analysis of Reinforced Concrete Flat Slab-TShaped Column Structures

In order to study the energy dissipation mechanism of reinforced concrete flat slab-T-shaped column structures under the earthquake action,the typical reinforced concrete structures of this kind designed according to 7th seismic fortification intensity,which were modeled on a series of parameters such as lateral force distribution,span sizes,story heights and total heights,were analyzed in the elasto-plastic condition by ETABS analysis program.Then the seismic performances of the structures were evaluated by the capacity-spectrum procedure.The analysis results show that the structures,in which the plastic hinges are well distributed and most of elements participate in energy dissipation,behave as the perfect seismic performance of strong column-weak beam structure system with the soft story occurred in the first story.The structures can satisfy the specified value of elasto-plastic story drift in the current code and have seismic performance against 7th intensity rare earthquake.According to the seismic performance,it is clear that the seismic design procedure based on performance level,which can represent the direction of the improved seismic design,is more reasonable than the seismic design procedure based on strength.