Efficient analysis of pile-group effect on seismic stiffness and strength design of buildings

✍ Scribed by Izuru Takewaki; Akiko Kishida

• Publisher: Elsevier Science
• Year: 2005
• Tongue: English
• Weight: 851 KB
• Volume: 25
• Category: Article
• ISSN: 0267-7261
• DOI: 10.1016/j.soildyn.2005.02.009

✦ Synopsis

A new efficient method is developed for the analysis of pile-group effects on the seismic stiffness and strength design of buildings with pile foundations. An efficient continuum model consisting of a dynamic Winkler-type soil element and a pile is used to express the dynamic behavior of the structure-pile-soil system with only a small numerical error. The pile-group effect is taken into account through the influence coefficients among piles which are defined for interstory drifts and pile-head bending moments. It is shown that, while the pile-group effect reduces the interstory drift of buildings in general, it may increase the bending moment of piles at the head. This means that the treatment without the pile-group effect results in the conservative design for super-structures and requires a revised member design for piles.