High-strength steel reinforced squat UHPFRC shear walls: Cyclic behavior and design implications

Hung, Chung-Chan; Li, Honghao; Chen, Hong Chi

doi:10.1016/j.engstruct.2017.02.068

Cited by 77 publications

(27 citation statements)

References 25 publications

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“…RC shear walls have exceptional strength and stiffness for resisting lateral forces. However, low-rise RC walls are vulnerable to rapid decay in stiffness and strength under displacement reversals due to their shear-critical behavior, which significantly limits their energy dissipation capacity and ductility (Paulay et al 1982;Hidalgo et al 2002;Hung et al 2017). Hung et al (2017) and Hung and Hsieh (2020) investigated the cyclic behavior of squat R/UHPC shear walls with flexure-and shear-dominant responses.…”

Section: Shear Wallsmentioning

confidence: 99%

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A Review of Developments and Challenges for UHPC in Structural Engineering: Behavior, Analysis, and Design

2021

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The number of studies on ultrahigh-performance concrete (UHPC) or ultrahigh-performance fiber-reinforced concrete (UHP-FRC) for more resilient and sustainable reinforced concrete (RC) structures has rapidly increased in recent years due to the superior mechanical and durability properties of UHPC. The application of UHPC as a replacement for conventional concrete materials in various RC elements necessitates a thorough understanding of the structural behavior of the reinforced UHPC (R/UHPC) components under various types of loadings. This paper presents a systematic review of the state-of-the-art developments in R/UHPC elements. It addresses various topics including beams, columns, beam-column joints, shear walls, bridges, structural retrofitting, and applications such as seismic and impact. Due to the ultrahigh tensile, compressive, and bond strengths, unique strain-hardening behavior, and ductility of UHPC, R/UHPC structures may exhibit substantially different behavior than conventional RC structures at both the component and system levels. This implies that particular attention must be paid when design and analysis approaches for conventional RC elements are applied to R/UHPC elements, and suggests that developing new design philosophies is warranted to take advantage of UHPC's unique mechanical properties. The present paper summarizes the developments in analysis and design approaches for R/UHPC elements under axial forces, shear forces, and bending moments, and highlights the advantages and limitations of these approaches. Important design considerations for effectively utilizing UHPC in structural elements are also suggested. In addition to normal-strength steel reinforcing bars, the potential for reinforcing UHPC with high-strength steel bars, fiber-reinforced polymer components, and structural steel shapes is discussed based on the results of pioneering studies. Finally, this paper identifies challenges and suggests future directions for research on UHPC in structural engineering.

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Section: Shear Wallsmentioning

confidence: 99%

“…It was demonstrated Table 1. Summary of experimental results of the selective R/UHPC shear walls studied by Hung et al (2017) and Hung and Hsieh (2020) (units in mm and MPa)…”

Section: Uhpc-concrete and Uhpc-steel Bond Behaviorsmentioning

confidence: 99%

A Review of Developments and Challenges for UHPC in Structural Engineering: Behavior, Analysis, and Design

2021

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“…The shear-critical behavior of squat shear walls caused limited ductility, stiffness and strength retention. Therefore, four UHPC squat shear walls with the aspect ratio of 0.73 were tested by Hung et al (2017). The top and bottom ends of the precast wall element were finished with jagged edges as shear keys to increase the connection strength between the wall element and concrete block.…”

Section: Shear Wallsmentioning

confidence: 99%

A review on seismic behavior of ultra-high performance concrete members

Fang

Shi

et al. 2020

Advances in Structural Engineering

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Ultra-high performance concrete (UHPC) is a type of cementitious composite, and demonstrates very high compressive strength and good ductility. The favorable ductility and energy dissipation capacity of UHPC material make it possible to achieve excellent seismic performance in all kinds of structural members. The paper reviewed the recent progress on the seismic behavior of UHPC members, including flexural members (beams and plates), compressive members (columns and shear walls), joints (beam-column joints and plate-column joints), strengthening (strengthening for columns, shear walls and joints) and connections (bar lap splice and grout). A series of potential future researches on the seismic behavior of UHPC members were finally suggested for promotion of the application of UHPC in civil engineering.

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“…Fu et al 20 experimentally studied the seismic performance of I‐shaped shear walls with HRB 600 MPa shear reinforcing bars. Hung et al 21 experimentally studied the seismic performance of ultrahigh performance fiber reinforced concrete (UHPFRC) walls with high‐strength reinforcing bars ( f y = 785 MPa), and the study indicated that UHPFRC could better engage the full strength capacity of high strength reinforcement. Ni et al 22 experimentally investigated the seismic performance of rectangular walls reinforced by HRB 600 MPa reinforcing bars, and HRB 600 MPa reinforcing bars were used as the vertical and horizontal reinforcing bars.…”

Section: Introductionmentioning

confidence: 99%

Hysteretic model of shear walls built with high‐strength reinforcement

Cao

Hou

2021

Structural Concrete

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The seismic performance of shear walls reinforced with high‐strength bars has been experimentally studied in depth; however, limited analytical research exists on such walls. As part of this study, two shear walls reinforced with Grade HRB 600 bars and subjected to different axial load ratios (0.1 and 0.2) were tested under cyclic loading to study their hysteretic performance. As part of the analytical investigation, a method to model the hysteretic response of shear walls built with high‐strength bars is proposed, consisting of a skeleton curve and a set of empirical hysteretic rules. The skeleton curve consists of a simplified quadrilinear model, represented by points at cracking, yield, peak, and ultimate. The empirical hysteretic rules are based on the Park hysteretic model. The experimental test data in this paper were used to validate the accuracy of the proposed analytical method. The results show that the analytical lateral force‐displacement hysteretic curves are in reasonable agreement with the experimental curves, especially in terms of the loading and unloading stiffnesses and pinching behavior.

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High-strength steel reinforced squat UHPFRC shear walls: Cyclic behavior and design implications

Cited by 77 publications

References 25 publications

A Review of Developments and Challenges for UHPC in Structural Engineering: Behavior, Analysis, and Design

A Review of Developments and Challenges for UHPC in Structural Engineering: Behavior, Analysis, and Design

A review on seismic behavior of ultra-high performance concrete members

Hysteretic model of shear walls built with high‐strength reinforcement

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