Calculation of Circular Reinforced Concrete Long Columns Confined with CFRP Sheets under Axial Compression
Owing to some problems in their stability of building structures in service, the general software ANSYS is adopted to establish the finite element models of circular reinforced concrete long columns confined with CFRP sheets under axial compression and used to analyze the influence of CFRP sheets to these structural buckling loads. Height of columns, layers of CFRP sheets, concrete grade, longitudinal rebar diameter, stirrup diameter and stirrup spacing are some factors considered. Based on the nonlinear finite element buckling analysis of these columns, some major conclusions are summarized as follows: (1) The enhanced level of buckling load descends with columns heights increasing; (2) The buckling load rises along with the increasing number of layers on a nonlinear manner; (3) The buckling loads increment is hardly dependent of concrete grade, longitudinal rebar diameter, stirrup diameter and stirrup spacing; (4) The improvement is not very obvious to use CFRP sheets to strengthen the structures when their stabilities go wrong. Influences of CFRP sheets to circular reinforced concrete long columns under axial compression can be found by analyzing the stability of these columns, and the analysis results are available for the strengthening of some structures in practice.
Nonlinear finite element Stability Reinforced concrete long column Carbon fiber reinforced plastic (CFRP) Strengthening Axial compression
Qingxin Ren Shunqun Li Yanhua Liu
College of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, China Department of Civil Engineering, Liaoning Institute of Technology, Jinzhou 121001, China College of Water Resource, Shenyang Agricultural University, Shenyang 110161, China
国际会议
南京
英文
930-933
2007-10-16（万方平台首次上网日期，不代表论文的发表时间）