Article
Chemistry, Physical
Jung-Hwan Hyun, Jin-Wook Bang, Bang-Yeon Lee, Yun-Yong Kim
Summary: This study investigated the effects of replacing concrete with ECC on the cyclic behavior of RC columns, showing that ECC columns exhibit higher cyclic behavior, especially in terms of energy dissipation capacity when the length is 3.6d or more.
Article
Construction & Building Technology
Reza Hassanli, Allan Manalo, Davoud Vafaei, Mohammad Yekrangnia, Mohamed Elchalakani, Martin Noel
Summary: This paper investigated the cyclic behavior of glass fiber-reinforced polymer (GFRP) reinforced concrete (GFRP-RC) slabs incorporating synthetic fibers. The study aimed to improve the performance of GFRP-RC slabs at both serviceability and ultimate limit states. The results showed that the fibers had a more pronounced effect on GFRP-RC slabs compared to steel-RC slabs, reducing crack widths and deflections and enhancing energy absorption.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Engineering, Civil
Jesus Emilio Rivera, Rami Eid, Patrick Paultre
Summary: The study examined the behavior of large-scale synthetic fiber-reinforced concrete columns under constant axial load and reversed flexure, showing slightly improved cyclic behavior compared to columns with spiral transverse reinforcement. The enhanced performance of synthetic fiber-reinforced concrete can be achieved with practical transverse steel reinforcement spacings, providing similar ductile behavior with reduced reinforcement and the addition of synthetic fibers. Difficulty in placing synthetic fiber-reinforced concrete in congested columns limits its use in columns with spacing less than 75mm until self-leveling concrete with a large amount of synthetic fibers is developed.
ENGINEERING STRUCTURES
(2021)
Article
Engineering, Civil
Guan Lin, Jun-Jie Zeng, Sheng-Da Liang, JinJing Liao, Yan Zhuge
Summary: This study aims to develop a novel form of FRP-RC beam-column joints with superior energy dissipation capacity by incorporating an internal FRP tube in the joint zone. Experimental results demonstrated that the FRP tube, especially the one with a fiber angle of +/- 45 degrees, can enhance the energy dissipation capacity of FRP-RC beam-column joints.
ENGINEERING STRUCTURES
(2022)
Article
Construction & Building Technology
Dejian Shen, Ming Li, Jiacheng Kang, Ci Liu, Chengcai Li
Summary: The seismic performance, load bearing capacity, ductility, and stiffness of the RC interior beam-column joints were significantly improved after strengthening with BFRP sheets in different ways. Strengthening with BFRP also enhanced the energy dissipation capacity of the joints.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Civil
Demewoz W. Menna, Aikaterini S. Genikomsou, Mark F. Green
Summary: Recent developments in high-performance double-hooked-end steel fibers have expanded the applications of steel fiber reinforced concrete (SFRC). This study examined the compressive properties and cyclic flexural performance of SFRC with different volume fractions of double-hooked-end steel fibers. The results showed that increasing the volumetric ratio of the fibers improved the ductility, tensile strength, cyclic flexural strength, and energy dissipation characteristics of the SFRC. Additionally, using larger steel fibers enhanced the flexural strength and energy dissipation of the SFRC.
FRONTIERS OF STRUCTURAL AND CIVIL ENGINEERING
(2022)
Article
Construction & Building Technology
Zeyang Sun, Yunlou Sun, Yi Zheng, Kentaro Iwashita, Jian Zhang, Gang Wu
Summary: The poor corrosion resistance of steel bars limits the potential application of precast concrete structures. A promising solution is the use of steel-fiber reinforced polymer (FRP) composite bars (SFCBs) as reinforcements. This paper describes a quasi-static test conducted on precast concrete columns reinforced with bundled SFCBs (PCC-B-SF). The results show that increasing the number of bars in each bundle leads to higher deformation capacity, energy ductility, and self-centering ability, although there may be a negative impact on energy dissipation.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Engineering, Civil
Arafa M. A. Ibrahim, Hesham M. Diab, Yehia A. Hassanean, Omar A. Farghal, Mustafa M. A. Ismail
Summary: Recent experimental results have shown the feasibility of using thin steel fiber reinforced concrete jackets to enhance the performance of slender reinforced concrete beams. The bond between the beams and the jackets is a crucial parameter to prevent slippage failure. This study presents a detailed 3D finite element model to evaluate the structural performance of RC beams strengthened with SFRC jackets and investigates the effect of significant parameters on their response in shear.
Article
Chemistry, Multidisciplinary
Dario De Domenico, Emanuele Gandelli, Alberto Gioitta
Summary: This paper investigates the seismic response and recentering behavior of reinforced concrete frames through numerical analysis. Three synthetic behavioral indexes are used to describe the behavior, and a fiber-hinge formulation and versatile pivot hysteresis model are implemented to capture inelastic behavior and pinching effects. Practical design abacuses are constructed to describe the trends of the behavioral indexes based on a parametric study of 80 RC frame scenarios.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Civil
F. Dabbaghi, T. Y. Yang, A. Tanhadoust, S. B. Emadi, M. Dehestani, H. Yousefpour
Summary: The study examines the seismic performance of damaged light weight aggregate reinforced concrete beams after exposure to elevated temperatures, showing that light weight beams perform better compared to normal weight beams. As the thermal exposure level increased, the residual deformations of the entire set of beams decreased, although this decrease was less pronounced in lightweight prisms.
ENGINEERING STRUCTURES
(2022)
Article
Engineering, Civil
Ya Lu, Jingcheng Han, Puyan Wang, Xiangguo Wu, Hyeon-Jong Hwang, Jian Zhou, Ran Li, Sung-Hyun Kim, Ho -Jun Lee
Summary: An analytical model was developed to predict the flexural behavior of ultra-high performance fiber reinforced concrete (UHPFRC) based on the three-dimensional random distribution of fibers. A probability distribution model of fiber orientation, which agreed with measured data, was proposed. The model considered the effect of fiber orientation on the number of fibers at the fracture surface. The proposed model successfully predicted the peak flexural strength and energy dissipation of UHPFRC beams.
ENGINEERING STRUCTURES
(2023)
Article
Construction & Building Technology
Mahdi Nematzadeh, Saber Fallah-Valukolaee
Summary: The study evaluated the structural performance of two-layer fiber-reinforced concrete beams with GFRP and steel rebars under quasi-static loads. The results showed that adding fibers to different zones of the section led to different effects on ductility and ultimate flexural strength, while increasing reinforcement ratio and concrete compressive strength improved the flexural performance of the beams. Replacing steel rebars with GFRP ones decreased the load-carrying capacity, flexural stiffness, and ductility of the beams.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Pitcha Jongvivatsakul, Chanachai Thongchom, Amaras Mathuros, Tosporn Prasertsri, Musa Adamu, Shanya Orasutthikul, Akhrawat Lenwari, Tawatchai Charainpanitkul
Summary: This study investigates the use of carbon nanotubes (CNTs) as additives to enhance the bonding strength between concrete and carbon fiber reinforced polymer (CFRP). By adding different types and weight percentages of CNTs to epoxy, single-shear tests were conducted to analyze the bonding behavior. The results show that a certain proportion of CNTs modified epoxy can improve the bonding strength and interfacial fracture energy.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Engineering, Civil
Jianyang Xue, Hechao Li, Rui Ren, Xin Zhang
Summary: The study reveals that the bond stress of steel reinforced recycled concrete declines significantly under cyclic reversed load, with energy dissipation mainly occurring in the falling and residual stages.
ENGINEERING STRUCTURES
(2021)
Article
Construction & Building Technology
Huanzhen Xie, Liyun Yang, Qihu Zhang, Chen Huang, Meixia Chen, Kangpu Zhao
Summary: The experimental study shows that the appropriate amount of basalt fiber can effectively improve the dynamic tensile strength and energy dissipation of concrete. The dynamic splitting process can be divided into different stages, and the loading level promotes the dissipated energy of basalt fiber reinforced concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
