A modulus-multiplier approach for non-linear analysis of laterally loaded pile groups

作者：Fan Chia Cheng^*; Long James H

来源：International Journal for Numerical and Analytical Methods in Geomechanics, 2007, 31(9): 1117-1145.

DOI：10.1002/nag.582

• laterally loaded pile group
• group effect
• modulus multiplier
• pile-to-pile interaction
• finite element analysis
• group pile p-y curve

A modulus-multiplier approach, which applies a reduction factor to the modulus of single pile p-y curves to account for the group effect, is presented for analysing the response of each individual pile in a laterally loaded pile group with any geometric arrangement based on non-linear pile-soil-pile interaction. The pile-soil-pile interaction is conducted using a 3D non-linear finite element approach. The interaction effect between piles under various loading directions is investigated in this paper. Group effects can be neglected at a pile spacing of 9 times the pile diameter for piles along the direction of the lateral load and at a pile spacing of 6 times the pile diameter for piles normal to the direction of loading. The modulus multipliers for a pair of piles are developed as a function of pile spacing for departure angle of 0, 90, and 180sup > /sup > with respect to the loading direction. The procedure proposed for computing the response of any individual pile within a pile group is verified using two well-documented full-scale pile load tests.

• 出版日期2007-8-15