Ultimate Load Formula for Reinforced Concrete Wall Panels with Openings

Doh, Jeung‐Hwan; Fragomeni, Sam

doi:10.1260/136943306776232954

Cited by 27 publications

(46 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, an attempt has been performed to compare both experimental and FEM simulation results with existing empirical formula. Many researchers have studied the structural behaviour and failure load of RC walls with openings (Saheb and Desayi, , ; Doh and Fragomeni, ; Doh and Fragomeni, ; Fragomeni et al, ) and have proposed a simplified formula to calculate the ultimate failure load. Based on the material properties and dimensions of the NW specimen

f_{c}^{'} < 25

MPa, slenderness ratio ( H / t w < 16), aspect ratio ( H / L < 2), thinness ratio ( L / t w < 8) and opening aspect ratio ( H o / L o ≈ 1.8), using the formula suggested by (Saheb and Desayi, , ) is preferred.…”

Section: Resultsmentioning

confidence: 99%

“…Wall panels often experience eccentric loads due to a range of loading conditions including corbel element applied to the wall, imperfections in construction, an uneven loading condition on top of the wall or due to temporary loading during operation and/or maintenance. Many researchers have investigated the behaviour of RC walls with various material properties, geometry and boundary conditions (Saheb and Desayi, , ; Doh and Fragomeni, ; Doh and Fragomeni, ; Fragomeni, Doh, and Lee, ). However, little research has been carried out on the CFRP strengthening method on the RC wall under eccentric axial loads.…”

Section: Application Of Cfrp In Concrete Elementsmentioning

confidence: 99%

See 1 more Smart Citation

The effects of CFRP orientation on the strengthening of reinforced concrete structures

Lima

Doh

Hadi

et al. 2016

Struct. Design Tall Spec. Build.

View full text Add to dashboard Cite

In recent years, the strengthening and retrofitting of structural members using externally bonded carbon fibre reinforced polymer (CFRP) materials has gained a great deal of attention. This has eventuated from the superior properties of composite materials, including high elastic modulus, higher strengths and lighter weights. This paper presents a finite element analysis that has been validated against laboratory tests of two reinforced concrete (RC) beams, two columns, two slabs and six walls. The main focus is on the ultimate failure load of these members as they have different CFRP orientations to the loading direction. The analysis result shows a sound agreement with the experimental data regarding the ultimate failure load of RC samples, except for the RC wall. In fact, the RC wall, while under eccentric axial load, confirmed that the CFRP orientation was parallel to the loading direction, and it proved to be an insignificant contribution in the ultimate failure load of the samples. This finding demonstrates that more experiments should be considered when investigating the influence of CFRP on the ultimate strength of strengthened RC walls.

show abstract

f_{c}^{'} < 25

Section: Resultsmentioning

confidence: 99%

Section: Application Of Cfrp In Concrete Elementsmentioning

confidence: 99%

The effects of CFRP orientation on the strengthening of reinforced concrete structures

Lima

Doh

Hadi

et al. 2016

Struct. Design Tall Spec. Build.

View full text Add to dashboard Cite

show abstract

“…Several NSMFRPs studies were conducted by Sas [9], Konthesingha et al [10], Griffith et al [11], Lee and Cheng [12], Sakar et al [13], Stoian et al [14], Florut ß et al [15] and others, whereas the TRM technique was investigated by Bernat-Maso et al [16], Bernat et al [17], Elsanadedy et al [18], Larrinaga et al [19], Corradi et al [20] and others. Other research presented by Wang et al [21], Carrillo and Alcocer [22], Demeter [23], Guan et al [24], Doh and Fragomeni [25], Parulekar et al [26] investigated reinforced concrete walls with or without openings.…”

Section: Introductionmentioning

confidence: 99%

Numerical and experimental investigation on seismically damaged reinforced concrete wall panels retrofitted with FRP composites

Toduţ¹,

Dan²,

Stoian³

2015

Composite Structures

View full text Add to dashboard Cite

“…Openings are generally present in load bearing walls for the provision of services, doors and windows. However, previous experimental research on the strength and behaviour of concrete walls with openings is very limited [3][4][5][6] with many researchers expressing the need for more test data to verify empirical design methods. Although limited, research on walls with openings has established some significant conclusions.…”

Section: Introductionmentioning

confidence: 99%

“…More recently Doh and Fragomeni [6] tested eight (8) one-third to one-half scale wall panels with openings and with a slenderness ratio of 30 or 40. Incorporating their own data and the test results of Saheb and Desayi [5], the previously published empirical formulae [1,2,9] for walls without an opening were extended to allow for openings and H/t up to 40 [6]. Or,…”

Section: Introductionmentioning

confidence: 99%

Ultimate strength analysis of normal and high strength concrete wall panels with varying opening configurations

Guan

Cooper

Lee

2010

Engineering Structures

View full text Add to dashboard Cite

Currently the wall panel design equations given in the Australian Standard and the American Institute Code offer no guidelines for the inclusion of side restraints or openings. Empirical formulae have been derived based upon limited test data, in which only the length and location of openings are accounted for with a dimensionless parameter, α x . In this study the nonlinear Layered Finite Element Method (LFEM) is used to undertake a comparative study to verify the effectiveness of the method in predicting the failure characteristics of seven (7) two-way normal strength concrete walls without and with window and door openings. The ultimate loads, load-deflection responses up to failure, deflected shapes and crack patterns predicted by the LFEM are compared to the experimental observations. The method is then used to conduct three parametric studies investigating the influence of opening size, length and height on the ultimate load and deflection of twenty (20) high strength wall panels acting in both one-way and two-way.Comparisons of the numerical results to established formula for walls with openings validated the accuracy of the LFEM predictions. Results demonstrate that increase in opening size decreases the axial strength ratio to different degrees for one-way and two-way walls.Increasing only the opening length also significantly decreases the axial strength ratio.Increasing only the opening height has little impact on the ultimate load capacity. Walls analysed in two-way action have an increased strength compared to the one-way counterparts due to the provision of side restraints, however, such improved strength becomes small for a * Corresponding author. 2 large sized opening. Results further confirm that increasing the opening height together with the length has the most critical effect. Hence to ensure safe design, the combined effects of increasing both the height and length of an opening should be incorporated into the ultimate load formula which is proposed in this study. The results of this study have assisted in verifying the LEFM as a reliable and effective technique for determining a relationship between ultimate load capacity and varying opening configurations so that more dependable design aids and accurate formulae can be established.

show abstract

Ultimate Load Formula for Reinforced Concrete Wall Panels with Openings

Cited by 27 publications

References 8 publications

The effects of CFRP orientation on the strengthening of reinforced concrete structures

The effects of CFRP orientation on the strengthening of reinforced concrete structures

Numerical and experimental investigation on seismically damaged reinforced concrete wall panels retrofitted with FRP composites

Ultimate strength analysis of normal and high strength concrete wall panels with varying opening configurations

Contact Info

Product

Resources

About