Seismic Damage Analysis Of Steel Reinforced High Strength And High Performance Concrete Composite Frame Structures

Owing to excellent seismic behavior, steel reinforced high strength and high performance concrete(SRHSHPC)composite structures have been applied in the engineering widely. However, the references of seismic damage are less about SRHSHPC composite structures. In this paper, the damage properties of composite structures was studied by combining physical model experiment, theoretical analysis and numerical simulation, and then a damage model which is suitable for SRHSHPC composite structures was proposed.Based on the test of SRHSHPC frame structure carried out by companion previously, the relationship of member, local structure and global structure failure was studied. Then the ANSYS was used to simulate the test of SRHSHPC frame structure by considering the bond-slip effect between steel and concrete. Finally, the hysteretic curves of all members were obtained which can supply the data for determining the damage parameter.Combined physical model experiment and theoretical analysis, according to the damage evolution process of SRHSHPC frame structure, the seismic damage model of SRHSHPC frame structure was proposed using weighting coefficient method and given reasonable assumption. The combination of location weighting coefficient and damage index was used as structure story damage weighting coefficient to establish the global damage model by comparison and analysis. Comparison of the calculated results with test ones indicates that the seismic damage model given can appropriately describe the damage evolution process of SRHSHPC frame structure, and reflect the effect of migration and transformation from member damage to structure damage.