Experimental study of fixed-ended RC deep beams under cyclic and monotonic loading Abolfazl Arabzadeh, T.Y. Yang, Rouhollah Hizaji, Asghar Amani Dashlejeh Canadian Journal of Civil Engineering, 2022 Reinforced concrete (RC) deep beams are commonly used in structural design to transfer vertical loads when there is a vertical discontinuity in the load path. Much experimental research has been conducted on simply supported deep beams, but little research has been carried out using monotonic loads. In our study, an experimental investigation was conducted to study fixed-ended reinforced concrete deep beams under cyclic and monotonic loads. Five specimens were experimentally tested. The specimens had similar geometry but different reinforcement details. Four specimens were tested under cyclic loads and one specimen under a monotonic load to observe the deflection of the mid-span where the load was applied, as well as the crack patterns, failure modes, and shear strengths. The results show that web reinforcements are more effective than longitudinal bars at increasing shear capacity in fixed-ended RC deep beams.
Shear Strengthening of RC Deep Beams with Symmetrically or Asymmetrically Positioned Square Openings Using CFRP Composites and Steel Protective Frames Hamid Karimizadeh, Abolfazl Arabzadeh, Mohammad Reza Eftekhar, Asghar Amani Dashlejeh Advances in Civil Engineering, 2022 In most cases, openings are made in the Web of deep beams for installations to pass through. These members require to be strengthened since the openings reduce load-bearing capacity. This study utilizes carbon fiber-reinforced polymer (CFRP) composites and steel protective frames (SPF) as strengthening configurations in reinforced concrete (RC) deep beams to improve the strength lost due to the square openings. To this end, eleven specimens with 10 × 50 × 120 cm in size were subjected to the three-point monotonic loading. In each beam, one or two square openings of 18 cm in each side are positioned either symmetrically or asymmetrically along the beam before it is strengthened with CFRP composites or SPFs. The strengthening composites were installed using externally bonded reinforcement (EBR) or externally bonded reinforcement on grooves (EBROG) techniques in two wrapped or inclined configurations. The obtained results indicate that specimens retrofitted by the SPF exhibited a superior performance as their loading capacity and energy absorption were enhanced by 115% and 337% in comparison with the reference beam, respectively, while these values for the specimens retrofitted by the EBROG technique were 58% and 182%, respectively, and 42% and 105% for those strengthened with the EBR technique.
Height effect on shear strength of deep beams without Shear Reinforcement with normal and lightweight concrete abolfazl arabzade, امین نوری Amirkabir Journal of Civil Engineering, 2021 یکی از پارامترهای مهم در تعیین ظرفیت برشی تیرها، ارتفاع تیر میباشد. در این تحقیق به منظور بررسی اثر ارتفاع در مقاومت برشی تیرهای عمیق با بتن سبک و مقایسه با بتن معمولی دو سری تیر که شامل 8 تیر عمیق با نسبت دهانه برشی به ارتفاع 5/0 بود ساخته شد. سری اول شامل 4 تیر به ارتفاع 30، 45، 60 و 90 سانتیمتر بود که در ساخت آنها از بتن سبک استفاده شد نمونههای سری دوم نیز شبیه سری اول بود با این تفاوت که در ساخت آنها از بتن معمولی استفاده شد. تیرهای بهصورت دو نقطهای و متمرکز از بالا تحت بار قرار گرفتند. نتایج نشان میدهد که مد گسیختگی مستقل از ارتفاع و نوع بتن میباشد. الگوی گسترش ترکها بیشتر تحت تأثیر ارتفاع است و تقریبا مستقل از نوع بتن میباشد. مقاومت برشی نرمالیزه شده در هر دو گروه از تیرها با افزایش ارتفاع کاهش مییابد. مقایسه نتایج حاصل از آزمایش با روشهای خرپایی موجود در آییننامهها نشان میدهد که تمام روشها در تیرهای با ارتفاع کم محافظهکارانه بوده و با افزایش ارتفاع از حاشیه ایمنی کاسته میشود. نتایج آییننامه CSA در مورد تیرها با ارتفاع cm90 غیر محافظهکارانه است که این امر نیاز به تحقیق بیشتری دارد.
Experimental and analytical study on reinforced concrete deep beams Asghar Amani Dashlejeh, Abolfazl Arabzadeh International Journal of Structural Engineering, 2019 A new simple strut-and-tie model was presented in this paper to study the behaviour of reinforced concrete deep beams. This model was obtained based on bottle-shaped struts that can predict flexural, bearing and shear modes of the failure. Also, the effect of web reinforcements was considered. The proposed model was verified by laboratory test results that obtained from five deep beams with a shear span-to-depth ratio of two and some other experimental results existing in the literature. Comparison of the results of the proposed model with relations from ACI 318 and AASHTO-LRFD codes and some other relations showed that the proposed model is efficiently capable of accurately predicting the ultimate load of simply supported deep beams. Also, comparison of experimental results demonstrated that the flexural capacity of deep beams obtained from the strut-and-tie model is conservative.
A Simple strut-and-tie model for prediction of ultimate shear strength of RC deep beams International Journal of Civil Engineering, 2009
Analysis of a RC simply supported deep beam with nonlinear computer program Proceedings of the International Conference on Application of Codes Design and Regulations, 2005
Analysis of some experimental results of simply supported deep beams using truss analogy method Iranian Journal of Science and Technology Transaction B Technology, 2001
Some experimental results for reinforced concrete deep beams with fixed-end supports Structural Engineering Review, 1994
RECENT SCHOLAR PUBLICATIONS
Effect of the crater-height ratio on the shear behavior of deep concrete beams reinforced with carbon polymer fibers by the NSM-EBR method A Arabzadeh, A Bahel Jadan Modares Civil Engineering journal 25 (6), 101-112 , 2026 2026
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Research Article Shear Strengthening of RC Deep Beams with Symmetrically or Asymmetrically Positioned Square Openings Using CFRP Composites and Steel Protective Frames H Karimizadeh, A Arabzadeh, MR Eftekhar, AA Dashlejeh 2022
Shear strengthening of RC deep beams with symmetrically or asymmetrically positioned square openings using CFRP composites and steel protective frames H Karimizadeh, A Arabzadeh, MR Eftekhar, A Amani Dashlejeh Advances in Civil Engineering 2022 (1), 5352330 , 2022 2022 Citations: 9
Experimental study of fixed-ended RC deep beams under cyclic and monotonic loading A Arabzadeh, TY Yang, R Hizaji, A Amani Dashlejeh Canadian Journal of Civil Engineering 49 (5), 813-822 , 2022 2022
A STM-based analytical model for predicting load capacity of deep RC beams with openings H Karimizadeh, A Arabzadeh Structures 34, 1185-1200 , 2021 2021 Citations: 15
Evaluating numerically the effects of concrete shear wall connecting to the steel frame on stimate strenght and mode of failure S Safara Modares Civil Engineering journal 21 (4), 99-111 , 2021 2021
Journal of Structural and Construction Engineering A Arabzadeh, H Karimizadeh Journal of Structural and Construction Engineering 8 (4), 45-65 , 2021 2021
Shear Strengthening of RC Deep Beams with Circular Openings by Means FRP Composites A Arabzadeh, H Karimizadeh JOURNAL OF STRUCTURAL AND CONSTRUCTION ENGINEERING 8 (4), 45-65 , 2021 2021
Height effect on shear strength of deep beams without Shear Reinforcement with normal and lightweight concrete A Arabzade, A Noori Amirkabir Journal of Civil Engineering 52 (10), 2501-2514 , 2020 2020
INVESTIGATION OF EXPERIMENTAL BEHAVIOR OF FIXED-ENDED REINFORCED CONCRETE DEEP BEAMS UNDER CYCLIC AND MONOTONIC LOADS A Arabzade, R Hizaji Sharif Journal of Civil Engineering 35 (4.2), 67-73 , 2020 2020
Experimentally studying and development of curved STM to predict the load capacity and failure mode of fixed-ended RC deep beams A Arabzadeh, R Hizaji, TY Yang Structures 23, 289-303 , 2020 2020 Citations: 13
Analysis of boundary condition effects on RC deep beams A Arabzadeh Structures 23, 821-830 , 2020 2020 Citations: 10
New model for prediction of ultimate load of prestressed RC deep beams TY Yang, AA Dashlejeh, A Arabzadeh, R Hizaji Structures 23, 509-517 , 2020 2020 Citations: 16
Experimental study of RC deep beams with opening and FRP composites installed by means of EBR and EBROG methods A Arabzadeh, H Karimizadeh Construction and Building Materials 208, 780-791 , 2019 2019 Citations: 49
A simple approach to predict the shear capacity and failure mode of fix-ended reinforced concrete deep beams based on experimental study A Arabzadeh, R Hizaji Int. J. Eng 32, 474-483 , 2019 2019 Citations: 8
MOST CITED SCHOLAR PUBLICATIONS
Experimental investigation of composite shear walls under shear loadings A Arabzadeh, M Soltani, A Ayazi Thin-Walled Structures 49 (7), 842-854 , 2011 2011 Citations: 153
A simple strut-and-tie model for prediction of ultimate shear strength of RC deep beams A Arabzadeh, AR Rahaei, R Aghayari International Journal of Civil Engineering 7 (3), 141-153 , 2009 2009 Citations: 79
Local elastic buckling coefficients of steel plates in composite steel plate shear walls A Arabzade, H Moharami, A Ayazi Scientia Iranica 18 (1), 9-15 , 2011 2011 Citations: 53
Investigation of experimental and analytical shear strength of reinforced concrete deep beams A Arabzadeh, R Aghayari, AR Rahai International Journal of Civil Engineering 9 (3), 207-214 , 2011 2011 Citations: 52
Experimental study of RC deep beams with opening and FRP composites installed by means of EBR and EBROG methods A Arabzadeh, H Karimizadeh Construction and Building Materials 208, 780-791 , 2019 2019 Citations: 49
Strength of I-girders with Delta stiffeners subjected to eccentric patch loading A Arabzadeh, M Varmazyari Journal of Constructional Steel Research 65 (6), 1385-1391 , 2009 2009 Citations: 25
Analysis of some experimental results of simply supported deep beams using truss analogy method A Arabzadeh Iranian Journal of Science and Technology. Transaction B, Technology 25 , 2001 2001 Citations: 19
Numerical and experimental investigation of composite steel shear wall with opening A Arabzadeh, HR Kazemi Nia Korrani International Journal of Steel Structures 17 (4), 1379-1389 , 2017 2017 Citations: 17
New model for prediction of ultimate load of prestressed RC deep beams TY Yang, AA Dashlejeh, A Arabzadeh, R Hizaji Structures 23, 509-517 , 2020 2020 Citations: 16
A STM-based analytical model for predicting load capacity of deep RC beams with openings H Karimizadeh, A Arabzadeh Structures 34, 1185-1200 , 2021 2021 Citations: 15
Experimental and analytical study on reinforced concrete deep beams AA Dashlejeh, A Arabzadeh International Journal of Structural Engineering 10 (1), 1-24 , 2019 2019 Citations: 15
Parametric investigation of the behavior of a proposed steel coupling beam in coupled shear wall structures under cyclic loading A Arabzadeh, E Omranian Sharif Journal of Civil Engineering 30 (2), 133-141 , 2014 2014 Citations: 15
Experimental and analytical study on reinforced concrete beams in bending strengthened with FRP A Arabzadeh The open construction and building technology journal , 2014 2014 Citations: 14
Experimentally studying and development of curved STM to predict the load capacity and failure mode of fixed-ended RC deep beams A Arabzadeh, R Hizaji, TY Yang Structures 23, 289-303 , 2020 2020 Citations: 13
A new model for predicting the effective strength in reinforced concrete bottle-shaped struts A Arabzadeh, R Aghayari, AR Rahai International Journal of Civil Engineering 10 (4), 253-262 , 2012 2012 Citations: 12
Analysis of boundary condition effects on RC deep beams A Arabzadeh Structures 23, 821-830 , 2020 2020 Citations: 10
Truss analogy for the analysis of reinforced concrete fixed-ended deep beams A Arabzadeh The Second International Conference in Civil Engineering on Computer … , 1996 1996 Citations: 10
Shear strengthening of RC deep beams with symmetrically or asymmetrically positioned square openings using CFRP composites and steel protective frames H Karimizadeh, A Arabzadeh, MR Eftekhar, A Amani Dashlejeh Advances in Civil Engineering 2022 (1), 5352330 , 2022 2022 Citations: 9
A simple approach to predict the shear capacity and failure mode of fix-ended reinforced concrete deep beams based on experimental study A Arabzadeh, R Hizaji Int. J. Eng 32, 474-483 , 2019 2019 Citations: 8
Evaluating the effects of distance between bolts on the behavior of composite steel shear wall H Ahmadi, A Arabzadeh ASIAN JOURNAL OF CIVIL ENGINEERING (BUILDING AND HOUSING) 14 (1), 145-159 , 2013 2013 Citations: 8