Journal of Jilin University(Engineering and Technology Edition) ›› 2020, Vol. 50 ›› Issue (2): 606-612.doi: 10.13229/j.cnki.jdxbgxb20181157

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Theoretical analysis of bearing capacity of concrete eccentric compressive column reinforced by HTRCS

Qian-hui PU1(),Jing-wen LIU1,Gang-yun ZHAO1,Meng YAN1,2,Xiao-bin LI1   

  1. 1.School of Civil Engineering，Southwest Jiaotong University，Chengdu 610031，China
    2.Sichuan Jiaoda Inspection and Consulting Engineering Company Limited，Chengdu 610031，China
  • Received:2018-11-21 Online:2020-03-01 Published:2020-03-08

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Abstract:

In this paper, based on the experiment conducted previously, failure mechanism and bearing capacity of strengthened specimens were analyzed theoretically. The relationship between the average crack spacing and the circumference of steel wire mesh was established, which can be used for quantitative analysis of the layers of steel wire mesh and the average crack spacing; The equation of transverse deflection curve of specimens with different layers of wire mesh was well fitted by half-wave curve; It was analyzed and verified that the reinforced specimens meet the plane section assumption during the deformation process for different load levels; Based on the strip method, the MATLAB program was used to calculate the bearing capacity of the HTRCS-reinforced RC eccentric column. The error was less than 5% compared with the experimental value. Therefore, it is reasonable and feasible to calculate the bearing capacity by the strip method.

Key words: bridge engineering, HTRCS, reinforced concrete eccentric column, reinforcement mechanism, theoretical analysis

CLC Number: 

  • U445.6

Fig.1

Design of RC column (mm)"

Fig.2

Loading system"

Fig.3

Strain measurement points layout"

Fig.4

Failure mode of S-T specimens"

Fig.5

Force analysis of strengthened specimen"

Fig.6

Comparison of lateral-displacement of specimens and fitted curves"

Fig.7

Verification of plane-section assumption of specimens"

Fig.8

Stress and strain distribution of ultimate bearing capacity"

Fig.9

Solution steps of ultimate bearing capacity"

Table 1

Comparison of theoretical and experimental values of bearing capacity"

试件理论值(1)试验值(2)(1)/(2)
S-T-253.4751.621.036
S-T-356.4453.861.048
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