（同济大学地下建筑与工程系 上海 200092）
［提要］ 针对端承长桩下长短桩桩筏基础这一新基础类型，运用三维弹塑性有限元方法数值模拟了外荷载分级施加过程中，基础中长桩、短桩以及垫层的荷载和位移变化曲线以及长短桩之间荷载的分担关系，从而有利于更深刻地理解端承长桩下长短桩桩基础的受荷与变形机理。
［关键词］ 长短桩 有限元 弹塑性 分级加载
Loading Process Analysis of Longshort Pile Foundation with Endbearing Long piles/Wang Wei, Yang Min(Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China)
Abstract:As a new type of foundation, some properties of longshortpile pile raft foundation with endbearing longpiles under multistage loading process are simulated using three dimensional elastoplastic finite element method, which includes loaddisplacement relationship of long pile, short pile and cushion layer, and proportion of load carried by long pile and short pile. The mechanism between load and displacement of longshort pile foundation with endbearing longpiles can be comprehended profoundly.
Keywords:longshort pile; finite element; elastoplastic; multistage loading