Integral Abutment Connections with Grouted Reinforcing Bar Couplers and Ultrahigh-Performance Concrete

DeJong, Austin; Shi, Weizhuo; Shafei, Behrouz; Hosteng, Travis

doi:10.1061/(asce)be.1943-5592.0001732

Cited by 5 publications

(3 citation statements)

References 17 publications

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“…A detailed review of the existing literature indicates that most of the past studies were focused on normal‐strength concrete (NSC) and high‐strength concrete (HSC). In recent years, advanced cementitious composite materials, such as ultra‐high‐performance fiber‐reinforced concrete (UHPFRC), have received attention, mainly because of their outstanding strength and durability 14–19 . With significantly high compressive and tensile strengths (compared to NSC and HSC), UHPFRC is a promising alternative to replace NSC conventionally used in CFSTs.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, advanced cementitious composite materials, such as ultra-high-performance fiber-reinforced concrete (UHPFRC), have received attention, mainly because of their outstanding strength and durability. [14][15][16][17][18][19] With significantly high compressive and tensile strengths (compared to NSC and HSC), UHPFRC is a promising alternative to replace NSC conventionally used in CFSTs. This is deemed an emerging application with very limited investigations available in the literature.…”

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confidence: 99%

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Synergistic use of ultra‐high‐performance fiber‐reinforced concrete (UHPFRC) and carbon fiber‐reinforced polymer (CFRP) for improving the impact resistance of concrete‐filled steel tubes

Saini

Shafei

2023

Structural Design Tall Build

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Concrete-filled steel tubes (CFSTs) have received growing attention, owing to their rapid construction, reduced labor requirement, and reasonable material cost. While in service, the CFSTs can be subjected to unexpected impact loads, originating from vehicle and vessel collision, as well as water-and wind-borne debris impact. Such extreme loading events often cause a partial or complete failure of conventional CFSTs, risking the safety and performance of the entire structural systems that rely on them. To address this issue, the current study explores how two advanced composite materials, including ultra-high-performance fiber-reinforced concrete (UHPFRC) and carbon fiber-reinforced polymer (CFRP), can be utilized to provide superior mechanical properties and minimize the vulnerability of CFSTs to impact loads. The composite materials under consideration are appropriate for both new and existing structures, in which normal-strength concrete can be replaced with UHPFRC, while CFRP sheets can further strengthen the CFSTs. For obtaining in-depth insights, a computational framework validated with the experimental tests was developed in the current study. Using a set of representative impact scenarios, various response measures, such as internal forces and deflections, as well as the energy absorbed by the CFSTs, were recorded during impact simulations. The investigations were then further extended to capture the influence of the main design parameters related to concrete, CFRP, and steel tube. From the conducted investigations, an energy absorption index was introduced, as a measure to evaluate the performance of CFSTs under impact loads.

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Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

Synergistic use of ultra‐high‐performance fiber‐reinforced concrete (UHPFRC) and carbon fiber‐reinforced polymer (CFRP) for improving the impact resistance of concrete‐filled steel tubes

Saini

Shafei

2023

Structural Design Tall Build

Self Cite

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“…The findings of these studies largely contributed to the improvement of the design of the grouted sleeve connection. For instance, in addition to the novel configuration of a seismic-resistant connection proposed by Tong [25,26], other studies suggested the use of innovative materials such as ultra-high and high-performance (UHPC) grouting materials to improve the connection's seismic Performance [27][28][29]. Regardless of the significant progress in the design optimization of the grouted sleeve connection, in some cases, the eventual presence of uncontrollable defects within the sleeve remains a major threat to the structural integrity of the connection.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical assessment of the location-based impact of grouting defects on the tensile performance of the fully grouted sleeve connection

Kahama

Xie

Lü

et al. 2022

Frattura Ed Integrità Strutturale

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The presence of grouting defects emanating from construction operations constitutes a major threat to the structural integrity of the grouted sleeve connection of precast concrete members. This work presents a location-based assessment of the impact of grouting defects on the tensile performance of the grouted sleeve connection. Twenty-two specimens with different configurations of defects were subjected to a uniaxial tensile experiment. Corresponding numerical models were proposed, validated and used to conduct a sensitivity analysis of the connection to the defect's location while considering different design confinements of grouting materials. Experimental and numerical studies revealed the following outcome: In consideration of confinement parameters, when the defect of size 3d is located in the mid-span anchorage length, the variation of the sleeve-to-bar diameter (ds/d) from 2.66 (lower design limit) to 3.55 (upper design limit) changed the drop in the ultimate capacity from 19% to 44% below the connection's design requirement. The governing parameters of the grout-bar bond stiffness were the defect's location and degree of confinement. This work proposes a theoretical diagnosis model and a risk assessment catalogue as a promising step toward establishing a computerized diagnosis model of the defective connection to enlighten rational maintenance actions in actual construction.

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Internal curing capabilities of natural zeolite to improve the hydration of ultra-high performance concrete

Kazemian

Shafei

2022

Construction and Building Materials

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Integral Abutment Connections with Grouted Reinforcing Bar Couplers and Ultrahigh-Performance Concrete

Cited by 5 publications

References 17 publications

Synergistic use of ultra‐high‐performance fiber‐reinforced concrete (UHPFRC) and carbon fiber‐reinforced polymer (CFRP) for improving the impact resistance of concrete‐filled steel tubes

Synergistic use of ultra‐high‐performance fiber‐reinforced concrete (UHPFRC) and carbon fiber‐reinforced polymer (CFRP) for improving the impact resistance of concrete‐filled steel tubes

Experimental and numerical assessment of the location-based impact of grouting defects on the tensile performance of the fully grouted sleeve connection

Internal curing capabilities of natural zeolite to improve the hydration of ultra-high performance concrete

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