DISCUSSION. PREDICTING THE STRENGTH OF REINFORCED CONCRETE DEEP BEAMS WITH WEB OPENINGS.

1981 ◽  
Vol 71 (2) ◽  
pp. 615-616 ◽  
Author(s):  
LA KUBIK ◽  
JE GIBSON
Keyword(s):  
Reinforced Concrete ◽  
Deep Beams ◽  
Web Openings

Behavior and strength of reinforced concrete flanged deep beams with web openings

Structures ◽  
2020 ◽  
Vol 27 ◽  
pp. 506-524 ◽  
Author(s):  
Ata El-Kareim ◽  
Ahmed Arafa ◽  
Amal Hassanin ◽  
Mohamed Atef ◽  
Ahmed Saber
Keyword(s):  
Reinforced Concrete ◽  
Deep Beams ◽  
Web Openings

scholarly journals Effect of Shear Span to Effective Depth Ratio on the Behavior of Self-Compacting Reinforced Concrete Deep Beams Containing Openings Strengthened with CFRP

2019 ◽  
Vol 26 (1) ◽  
pp. 1-9
Author(s):  
Nabeel A. Al-Bayati ◽  
Bassman R. Muhammed ◽  
Muroj F. Oda
Keyword(s):  
Reinforced Concrete ◽  
Ultimate Load ◽  
General Trend ◽  
Load Path ◽  
Deep Beams ◽  
Web Openings ◽  
Shear Span ◽  
Depth Ratio ◽  
Effective Depth ◽  
Strengthened Beam

Results of test on seven simply supported self-compacting reinforced concrete deep beams, including six of these beams containing circular openings in center of load path are reported in this paper. The objective of the tests was determined the influence of, changing shear span to effective depth ratio a/d, the existence of circular openings in shear span and using inclined strips of carbon fiber polymer (CFRP) on behavior of deep beams. The general trend in crack pattern, the load-deflection response, and the mode of failure of reinforced SCC deep beams were also investigated. All specimens had the same geometry, details of the flexure and shear reinforcement in both vertical and horizontal directions and they were tested under symmetrical two-point loads up to failure. The experimental results revealed that the web openings within shear spans caused an important reduction in the deep beam capacity by 50% when compared with the corresponding solid beam. The increase a/d ratio from 0.8 to 1.2 decreases the ultimate load by 21.7% and 22.5 % for the reference unstrengthened beam and strengthened beam, respectively, also it was found that the externally inclined CFRP strips in deep beams increased the ultimate strength up to 39.5%, and enhanced the stiffness of deep beams with openings.

Shear strength of reinforced concrete deep beams with web openings

2020 ◽  
Vol 43 (7) ◽  
pp. 694-705
Author(s):  
Wen-Yao Lu ◽  
Guo-Zhen Lin ◽  
Chien-Chuang Tseng ◽  
Sheng-Ji Lin
Keyword(s):  
Shear Strength ◽  
Reinforced Concrete ◽  
Deep Beams ◽  
Web Openings

scholarly journals Finite Element Modeling for Self-Compacting Reinforced Concrete Deep Beams Containing Web Openings

2018 ◽  
Vol 7 (4.20) ◽  
pp. 546
Author(s):  
Ahlam Sader Mohammed ◽  
Laith Nasser Hussain
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Finite Element Modeling ◽  
Diagnostic Tests ◽  
Deep Beams ◽  
Web Openings ◽  
Element Modeling ◽  
Proposed Model ◽  
Extreme Load

A nonlinear limited component display is utilized to approve the consequences of limited component investigation with that of test work got from written works with the end goal to foresee execution of self-compacted strengthened solid; profound pillars incorporate roundabout web openings. Six indistinguishable profound bars were considered for this reason; one of them was strong that considered as a control bar. ANSYS PC program was utilized to accomplish the investigation of these bars. Examination between the test and limited component strategy results shows a satisfactory understanding with the goal that the proposed model can be embraced in future for further investigations. The diagnostic tests which were improved the situation different cases considered showed that the heap redirection conduct and a definitive burdens are in great concurrence with the distributed libratory results. The outcomes demonstrate that most extreme contrast between the anticipated numerical extreme burdens to the trial extreme load for all cases was under (14%); while the greatest rate distinction for redirection esteems was about 11%. Likewise, the extent of the openings and its area influence the heap conveying limit of the shafts.  

scholarly journals Effect of Size and Location of Square Web Openings on the Entire Behavior of Reinforced Concrete Deep Beams

2019 ◽  
Vol 5 (1) ◽  
pp. 209 ◽  
Author(s):  
Waleed A. Jasim ◽  
Abbas A. Allawi ◽  
Nazar Kamil Ali Oukaili
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Carrying Capacity ◽  
Shear Capacity ◽  
Load Carrying Capacity ◽  
Deep Beam ◽  
Deep Beams ◽  
Web Openings ◽  
Shear Span ◽  
Load Carrying

This paper presents an experimental and numerical study which was carried out to examine the influence of the size and the layout of the web openings on the load carrying capacity and the serviceability of reinforced concrete deep beams. Five full-scale simply supported reinforced concrete deep beams with two large web openings created in shear regions were tested up to failure. The shear span to overall depth ratio was (1.1). Square openings were located symmetrically relative to the midspan section either at the midpoint or at the interior boundaries of the shear span. Two different side dimensions for the square openings were considered, mainly, (200) mm and (230) mm. The strength results proved that the shear capacity of the deep beam is governed by the size and location of web openings. The experimental results indicated that the reduction of the shear capacity may reach (66%). ABAQUS finite element software program was used for simulation and analysis. Numerical analyses provided un-conservative estimates for deep beam load carrying capacity in the range between (5-21%). However, the maximum scatter of the finite element method predictions for first diagonal and first flexural cracking loads was not exceeding (17%). Also, at service load the numerical of midspan deflection was greater than the experimental values by (9-18%).

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