Stress-strain characteristics of concrete confined in steel spirals under repeated loading

Desayi, Prakash; lyengar, K. T. Sundara Raja; Reddy, Thimma

doi:10.1007/bf02478814

Cited by 10 publications

(8 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The initial stiff ess of the unloading branches predicted by equation (15) results in very high values of the tangent modulus. Experimental studies [3,4,6] show" that equation (15) overestimates the initial unloading stiffness.…”

Section: Review Of the Performance Of The Model Of Mander Et Almentioning

confidence: 98%

Confined concrete model under cyclic load

Martinez-Rueda¹,

Elnashai²

1997

Mat. Struct.

314

View full text Add to dashboard Cite

A uniaxial cyclic model for confined and unconfined concrete is developed. Starting from an existing model, the cyclic rules to define inelastic strain and degradation of strength and stiffness are first reviewed and then modified to produce a new concrete model with enhanced performance. Comparisons at the stress-strain level between the new and existing concrete models reveal the adequacy of the new model in terms of numerical stability and increasing degradation of strength and stiffness under increasing cyclic strain. The proposed model is validated by comparing analytical predictions with experimental results of RC members under cyclic and dynamic loading. Good agreement is observed between analysis and experiments, confirming the ability of the model to predict the cyclic and dynamic behaviour of RC members with mixed axial-flexural response characteristics

show abstract

Section: Review Of the Performance Of The Model Of Mander Et Almentioning

confidence: 98%

Confined concrete model under cyclic load

Martinez-Rueda¹,

Elnashai²

1997

Mat. Struct.

314

View full text Add to dashboard Cite

show abstract

“…There are experimental studies reported in the literature for the behaviour of unconfined 3,4,5 or confined [5][6][7][8][9] normal strength concrete (20-49 MPa) subjected to cyclic axial compression. No experimental observations as such were reported for HSC in the past.…”

Section: Research Significancementioning

confidence: 99%

“…Measurement of both axial and lateral strain versus axial stress in cyclically loaded concrete was successfully completed in this experimental programme. Although there are a few experimental works reported in the literature 5 for cyclic loading of confined NSC, they do not report the behaviour of stress with lateral strain. Therefore the prediction of the behaviour of confined concrete subjected to axial cyclic loading has to be based on the results of column tests in the literature which used passive confinement, which requires several assumptions regarding the effective confinement.…”

Section: 4mentioning

confidence: 99%

“…This was the same with the experimental results reported for NSC. 5,9 However, some of the experimental results shown for NSC show that the thickness of the loops increases with increasing unloading strain.…”

mentioning

confidence: 99%

“…This is compatible with the experimental results reported in the literature for NSC. 3,4,5,9 In Stage 2 of the experiments, when there are a number of cycles from the same unloading strain, the stress reduction is increasing with the increasing number of cycles. This has been proven to be true by past researchers for NSC.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Triaxial test results of high-strength concrete subjected to cyclic loading

Lokuge

Sanjayan

Setunge

2003

Magazine of Concrete Research

View full text Add to dashboard Cite

High-strength concrete (HSC) has highly desirable structural engineering properties, which can lead to significant cost savings in heavily loaded concrete structures. However, its use is limited by a concern regarding an increased brittleness compared to normal strength concrete (NSC), especially under complex multi-axial loading conditions. The issue of ductility is extremely important in structures subjected to earthquake loading conditions. In order to determine the lateral confinement required for a given level of ductility, the relationship between axial stress and lateral strain of confined HSC needs to be established. This paper describes a testing programme carried out to obtain the relationships between axial stress, axial strain and lateral strain for HSC under cyclic loading and subjected to constant lateral confining pressures. Compressive strengths of concrete tested were 40, 60, 80 and 100 MPa. Uniform confining pressures applied were 4, 8 and 12 MPa. The experimental results are presented and the effects of cyclic loading and confinement on the constitutive behaviour of HSC are described.

show abstract