Enhancing the Ductility of a Reinforced Concrete Beam using Engineered Cementitious Composite

Abstract

A series of small-scale rectangular reinforced concrete beams made with different mix proportions were presented. The beams were fabricated using normal concrete designated as specimen control (NC), normal concrete blended with supplementary material using Class F fly ash (SMFA), and engineered cementitious composite (ECC). The beams comprised of similar reinforcement where the ratio of compression, tension, and transverse bars were 1.0%, 1.5%, and 1.0% respectively. To this end, the beams were tested under four-point bending and they were intended to fail in flexure mode. The tests also aimed to provide direct evidence regarding the improvement of beam ductility due to the use of ECC. Furthermore, the performance of test beams on the overall strength, crack pattern, and damage state was also assessed. To corroborate the experimental work, an analytical work employing nonlinear finite element analysis using Abaqus was also included. From this study, it was found that each beam demonstrated a discernible ductile plateau upon the post-cracking region with Beam ECC showing the largest ductility compared to the other two thereby suggesting that the use of ECC could enhance the beam ductility. It was also shown that the flexural cracks manifested in Beam ECC were less critical, signifying that ECC is a damage-tolerant composite. Furthermore, the overall results of predicted load-deflection and damage state obtained from Abaqus were also in a good agreement with the experimental results.

Performance of Reinforced Engineered Cementitious Composite Beams

“…The mix proportion of ECC and PVA properties are shown in Tables1 and 2.Finite element models were made for the beam utilizing three mesh sizes M25, M50 and M75, and nonlinear analysis was conducted until failure. The load deflection curves obtained from the three finite element models compared with the experimental results as well as numerical results obtained by Bastian et al[15] are shown in Fig.5. The model with mesh size 25 mm captures the experimental test result and numerical results are better than the other numerical models.…”

“…Bastian et al[15] presented experimental and numerical studies to investigate the flexural behavior of reinforced PVA-ECC beams. The beams had length of 2000 mm and a rectangular cross section of 100 mm x 200 mm, as shown in Fig.4.…”

Evaluation of Structure Using Variety of Slab Type Under Performance-Based Design: Case Study Common Working Space in Surabaya

“…The study is conducted to investigate the effectivity of the building without adding the beam under the method of waffle slab and flat slab. A novel alternative to enhance the capacity of the structure actually can be improved by tailoring the concrete material such as add supplementary materials like fly ash (Malviya, 2020(Malviya, , 2021Syarif & Djauhari, 2019), added engineered cementitious material (Bastian et al, 2020;Oktaviani et al, 2020) or combine a sustainable self-building material like bamboo (Nareswarananindya et al, 2021).…”

Analytical Study of Rectangular Concrete-Filled Tubes (RCFT) Connections using Finite Element Analysis under Cyclic Loading

“…In fact, this connection with internal diaphragms or external diaphragms are both advisable for 2-way frames, which can carry lateral loads from 2 horizontal directions [20]. The CFT can also be considered to be filled with cementitious materials or paste concrete such as engineered cementitious composite [21][22][23][24][25][26][27].…”