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《Urban Roads Bridges & Flood Control》 2011-12
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Simplified Calculation Formula for Design Seismic Force of Bridge Group Pile Foundation as Capacity Protective Member

Yin Pengcheng,Ye Aijun  
In the seismic design of bridges ductility,the foundation of group pile is designed as the capacity protective member sometimes.Based on this design method,it is required to calculate the seismic inertial force of base slab when the design seismic force of the foundation for the group pile is calculated.The article sets up a two-particle model of base slab-pier beam,analyzes the variable rule of the inertial force of base slab with the variation of pier rigidity,and puts forward the simplified calculation formula of seismic inertial force of base slab and the simplified calculation formula of the design seismic force of the foundation for the group pile.Finally,a finite element model based on a practical bridge project is established.The correctness and practicability of the simplified calculation formula is validated by the elastoplastic time-history analysis.
【Fund】: 国家自然科学基金资助项目(No.50878147)
【CateGory Index】: U443.15
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