Low-cycle fatigue behaviour of reinforcing bars including the effect of inelastic buckling

被引：56

作者：

Tripathi, Mayank ^{[1
]}

Dhakal, Rajesh P. ^{[1
]}

Dashti, Farhad ^{[1
]}

Massone, Leonardo M. ^{[2
]}

机构：

[1] Univ Canterbury, Dept Civil & Nat Resources Engn, Christchurch, New Zealand

[2] Univ Chile, Dept Civil Engn, Santiago, Chile

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2018年 / 190卷

关键词：

Buckling; Low-cycle fatigue; Reinforcing bars; Hysteresis; Reinforced concrete; Fatigue; STRESS-STRAIN RELATIONSHIP; CONCRETE; COLUMNS; TESTS; LIFE;

D O I：

10.1016/j.conbuildmat.2018.09.192

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Low-cycle fatigue life of Grade 300E and 500E reinforcing bars including the effect of buckling is evaluated. Low-cycle fatigue tests are carried out on un-machined specimens subjected to constant axial strain loading with strain amplitude ranging from 1% to 5%. The experimental test observations suggest that buckling of reinforcing bars has detrimental effect on its fatigue life and increase in slenderness ratio of the reinforcing bars results in substantial reduction of their low-cycle fatigue life. Equations relating the fatigue life (i.e. number of reversals to failure) with total strain amplitude and total energy dissipated as a function of buckling parameter is proposed. Also, experimental tests are carried out to investigate the influence of mean strain ratio on low-cycle fatigue behaviour of reinforcing bars. Comparative evaluation of the fatigue life models with the results of experimental investigation shows that the proposed model can predict the fatigue life of buckled and unbuckled reinforcing bars with reasonable accuracy. (C) 2018 Elsevier Ltd. All rights reserved.

引用

页码：1226 / 1235

页数：10

共 31 条

[1]

[Anonymous], 2001, ASN2S46712001

[2]

Brown J, 2004, ACI MATER J, V101, P457

[3]

Coffin Jr L.-F., 1954, J. Fluids Eng., V76, P931, DOI DOI 10.1115/1.4015020

[4] Tests on slender ductile structural walls designed according to New Zealand Standard [J].

Dashti F. ;

Dhakal R.P. ;

Pampanin S. .

Bulletin of the New Zealand Society for Earthquake Engineering, 2017, 50 (04) :504-516

[5] Quasi-static cyclic tests and plastic hinge analysis of RC structural walls [J].

Dazio, Alessandro ;

Beyer, Katrin ;

Bachmann, Hugo .

ENGINEERING STRUCTURES, 2009, 31 (07) :1556-1571

[6] Modeling for postyield buckling of reinforcement [J].

Dhakal, RP ;

Maekawa, K .

JOURNAL OF STRUCTURAL ENGINEERING-ASCE, 2002, 128 (09) :1139-1147

[7] Path-dependent cyclic stress-strain relationship of reinforcing bar including buckling [J].

Dhakal, RP ;

Maekawa, K .

ENGINEERING STRUCTURES, 2002, 24 (11) :1383-1396

[8] Reinforcement stability and fracture of cover concrete in reinforced concrete members [J].

Dhakal, RP ;

Maekawa, K .

JOURNAL OF STRUCTURAL ENGINEERING-ASCE, 2002, 128 (10) :1253-1262

[9]

El-Bahy A, 1999, ACI STRUCT J, V96, P633

[10] Nonlinear cyclic stress-strain relationship of reinforcing bars including buckling [J].

Gomes, A ;

Appleton, J .

ENGINEERING STRUCTURES, 1997, 19 (10) :822-826

← 1 2 3 4 →