|Table of Contents|

Comparative Analysis of Second-order Effect on Eccentrically Compressed Reinforced Concrete Member(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2010年03期
Page:
65-77
Research Field:
Publishing date:
2010-09-20

Info

Title:
Comparative Analysis of Second-order Effect on Eccentrically Compressed Reinforced Concrete Member
Author(s):
XU Jing;  GONG Jin-xin
Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China
Keywords:
structural engineering;  reinforced concrete member;  second-order effect;  moment;  axial force;  bearing capacity
PACS:
TU375.1
DOI:
-
Abstract:
The calculation formulas used for ultimate force state design of eccentrically compressed reinforced concrete members were derived. The sectional interactive relations of moment and axial force of members with different reinforcement ratios of steel bars and strength ratios of steel to concrete were calculated according to Chinese Code GB 50010—2002, American Code ACI 318-08 and European Code EN 1992-1-1:2004. Based on it, the corresponding interaction diagrams of moment and axial force of members with different slenderness ratios were obtained, taking second-order effects into account in different methods in the three codes, i.e., increased eccentricity method in Chinese Code, moment magnifier coefficient method in American Code, as well as methods based on nominal stiffness and nominal curvature in European Code. Analysis results show that different aspects are considered to analyze the second-order effects of eccentrically compressed reinforced concrete members in the three codes. End moments, stiffness and slenderness ratios of member are considered in American Code, and slenderness ratios, curvature, as well as end moments are considered in European Code. The bearing capacities of members decrease with increase of slenderness ratio subjected to the same end moments, but the calculated results based on the three codes are different, the sharpest decline is American Code, and the minimum is Chinese Code.

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Last Update: 2010-09-20