Mechanical behavior of segment rebar of shield tunnel in construction stage

Abstract：In this paper, a 3D finite element (FE) program ADINA was applied to analyzing a tunnel with 9 segment rings. The loads acting on these segment rings included the squeezing action of tail brush of shield machine under attitude deflection, the jacking forces, the grouting pressure and the soil pressure. The analyses focused on the rebar stress in two statuses: (1) normal construction status without shield machine squeezing; (2) squeezing action induced by shield machine under attitude deflection.The analyses indicated that the rebar stress was evidently affected by the construction loads. In different construction status, the rebar stress ranges from -80 MPa to 50 MPa, and the rebar is in elastic status. Even some cracks appear on segments, the stress of segment rebar is still at a low level. It is helpful to incorporate a certain quantity of steel fiber to improve the anti-crack and shock resistance performance. 作者： Author： Jun-sheng CHEN[1]  Hai-hong MO[2] 作者單位： Department of Civil Engineering, South China University of Technology, Guangzhou 510640, ChinaState Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510640, China 期 刊： 浙大學(xué)報(bào)（英文版）（A輯：應(yīng)用物理和工程）   ISTICEISCI Journal： JOURNAL OF ZHEJIANG UNIVERSITY SCIENCE A 年，卷(期)： 2008, 9(7) 分類號： U455 Keywords： Shield tunnel    Construction    Segment    Rebar    Finite element (FE) analysis    機(jī)標(biāo)分類號： TQ3 TB3 機(jī)標(biāo)關(guān)鍵詞： shock resistance    finite element    steel fiber 基金項(xiàng)目： Guangzhou Metro of China

【Mechanical behavior of segment rebar】相關(guān)文章：

Modeling of Mechanical Behavior of Fractal Rock Joint05-01

The Influence of Co Addition on Phase Transformation Behavior and Mechanical Properties of TiNi Alloys04-27

Social Customs and Behavior英語作文05-02

Research and Development of Growth Design System for Mechanical Products04-30

Raman Scattering of Nanocrystalline δ-TiNx Synthesized by Mechanical Milling04-29

A mechanical system to predict wet grip potential of pavements05-07

Children learn best by observing the behavior of adults and05-04

Geochemical characteristics of the metapelites from the Xingxingxia group in the Eastern Segment of the Central Tianshan04-29

The Aggregation Behavior and Formation of Nanoparticles of Oleoylchitosan in Dilute Aqueous Solution05-03

Degradation behavior of aggregate skeleton in stone matrix asphalt mixture05-07