Bearing Capability for Mirco-Pile with Concrete-Filled Steel Tubular Reinforced Building Foundation

Abstract

In general, the bearing capability is strength capability for mirco-pile. The stability bearing capability for mirco-pile with concrete-filled steel tubular becomes important in reinforced building foundation. The theory of buckling stability is applied to study the bearing capability of mirco-pile. According to the character of concrete filled steel tubular, the Euler force and the friction between pile and soil are combined for the buckling bearing capability of mirco-pile with concrete-filled steel tubular. The equation of mirco-pile with concrete-filled steel tubular is confirmed by some test data and numerical simulation. The slenderness ratio and material strength took great effects on the bearing capability of mirco-pile with concrete filled steel tubular. The equation on bearing capability mirco-pile with concrete filled steel tubular is applied for reinforce building foundation and referred to other application of concrete filled steel tubular.

Finite Element Analysis on Mirco-Steel Tubular Pile Refilled Concrete Reinforced Structure Foundation

“…Based on some failure modes and mechanics rules, some researchers presented some analytical formulas for mirco-steel tubular pile refilled concrete,however some mechanics formulas results had more errors than some site tests data.The buckling behaviors was rarely considered in these mathematical formulas of mirco-steel tubular pile refilled concrete [5]. According to the Eurocodes, a flexural buckling resistance was presented for Micro-steel tubular piles refilled concrete, however the calculation result based on these codes of EC4,BS5400,AIJ,AISC-LRFD and GB50936 had great errors with number simulation analyses [2,5,6].…”

“…In recent years, mirco-steel tubular piles refilled concrete have been applied to reinforce building foundation and side support in China. Some research results of mirco-steel tubular pile refilled concrete were presented [1] and were focused on some applications on bearing capability analysis for vertical loads,horizontal load.The buckling bearing capability of mirco-steel tubular pile filled with concrete was studied and some calculation formulas were presented [2].…”