PUSHOVER ANALYSIS OF SOIL-PILE-ECO-COMPOSITE WALLS INTERACTION SYSTEM

Capacity spectrum method was adopted to perform nonlinear static seismic response(pushover) analysis for eco-composite wall structure with grouped pile foundation resting on natural foundation soil.The substructure technique was adopted to simulate pile group with a group of springs, the grouped pile stiffness was determined with Davies method.According to the rigid frame-equivalent brace model, the Pushover model of soil-pile-structure interaction system was established.The differences of the results of two models under different earthquake intensities were discussed.The culated results show that in frequent earthquake conditions, structure performance point vertex displacement Un(rigid foundation) Un(interaction);while in rare earthquake conditions, There is the Un(rigid foundation) Un(interaction).When considering soil pile structure interaction, under the same seismic intensity conditions the base shear at performance point of the is increased as compared with a rigid foundation.