Article
Construction & Building Technology
Kai Qian, Jin-Song Li, Ting Huang, Yun-Hao Weng, Xiao-Fang Deng
Summary: The corrosion of reinforcement significantly affects the punching shear behavior of slab-column connections, changing the failure mode and reducing the punching shear strength. Existing design formulas are unreliable for predicting the punching shear strength of corroded slab-column connections, and the critical shear crack theory (CSCT) has been modified for accurate prediction.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Engineering, Civil
Mohamed H. El-Naqeeb, Basem S. Abdelwahed
Summary: The undesired punching shear failure around the columns is the most critical scenario that causes a brittle failure of reinforced concrete flat plates. Matured studies and code provisions are available to assess the punching shear strength of thin flat plates. However, there is a lack of studies on the footing performance under eccentric load. This numerical study aims to develop and validate a numerical model to examine the punching shear behavior of full-scale eccentrically loaded footings.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Binbin Ye, Peng Pan, Genqi Xiao, Jianguo Han, Yaoting Zhang
Summary: The study examined the performance of reinforced-ECC (RECC) slab-column connections compared to traditional RC specimens. Results showed that RECC specimens exhibited delayed punching shear failure with higher strength and ductility ratios compared to RC specimens. The findings suggest the feasibility of enhancing punching shear performance in slab-column connections by using ECC.
ENGINEERING STRUCTURES
(2021)
Article
Construction & Building Technology
Mahmoud A. El-Mandouh, Khaled Abu el-hassan
Summary: The study investigates the seismic behavior of full-scale slab-edge column connections constructed from Normal-Strength Concrete and High-Strength Lightweight Concrete, introducing the punching strength provisions from various international codes. The research highlights the importance of factors such as the use of HSLWC and the positioning of openings, revealing the differences in punching shear strength estimation between different code provisions for HSLWC. Additionally, the study shows significant improvements in the ultimate punching load for HSLWC compared to NSC, both with and without openings, and the successful forecasting capabilities of the ABAQUS finite element program.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Engineering, Civil
Kai Qian, Jin-Ge Liu, Xiao-Hui Yu, Yun-Hao Weng
Summary: Rebars in reinforced concrete slab-column connections can become corroded, leading to reduced punching shear capacity. This study investigated the effects of rebar corrosion on the punching shear capacity of slab-column connections through experimental and numerical analyses. The results showed that corrosion significantly reduced the punching shear capacity, and factors such as the size of the corroded area, slab thickness, and boundary conditions influenced the capacity.
Article
Engineering, Civil
Su-Min Kang, Su-Jeong Na, Hyeon-Jong Hwang
Summary: In the RC transfer slab system, the load transfer requires two-way shear action, where stirrups are commonly used for shear reinforcement. However, lap spliced stirrups are utilized in the RC transfer slab due to construction difficulties. Test results showed that spliced stirrups increased the two-way shear strength of the transfer slab specimens, compared with current design methods and the strut-tie model predictions.
ENGINEERING STRUCTURES
(2021)
Article
Construction & Building Technology
Haider J. Hammood, Javad Esfandiari, Mehrdad Movahednia, Mehrzad Tahamouli Roudsari
Summary: This paper investigates the impact of openings on the structural responses of interior voided slab-column connections. Seven specimens were constructed, with circular openings introduced in six of them. The test results reveal that all connections failed due to punching modes, with the strength declining by 35% when the opening size was 150 mm. Additionally, the energy absorption capacity decreased by 48.1%-74% and the stiffness dropped by 33.5%.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Construction & Building Technology
Basem S. Abdelwahed, Mosbeh R. Kaloop, Waleed E. El-Demerdash
Summary: This study investigated the role of low-strength concrete in reinforced concrete beam-column joints through numerical simulations, recommending a specific value for concrete dilation angle and finding that stirrups' yield strength had an insignificant role in improving joint shear resistance. Empirical models that implicitly considered the contribution of stirrups were found to provide better predictions for joint shear strength.
Article
Engineering, Civil
Su-Min Kang, Su-Jeong Na, Hyeon-Jong Hwang
Summary: In this study, concentric compression tests were conducted on eight RC transfer slabs with small shear span-to-depth ratio to investigate the two-way shear strength. The results showed that high-strength concrete or high reinforcement ratio increased the two-way shear strength of the transfer slab specimens, while those with large slab thickness but insufficient reinforcement were prone to punching shear failure with minimal strength increment.
ENGINEERING STRUCTURES
(2021)
Article
Construction & Building Technology
Mahmoud Elsayed, Israa Abdel-Hady, L. M. Abdel-Hafez, Yasser R. Tawfic
Summary: This experimental work examines the use of UHPFC as a strengthening system to enhance the punching shear capacity of slab-column connections. The results show that different strengthening schemes significantly improve the punching shear capacity of the connections, with strengthened slabs achieving substantial increases in capacity and stiffness. The use of UHPFC with longitudinal reinforcement is found to enhance the strength and toughness of the material.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Mechanics
M. A. L. Silva, K. Dedigamuwa, J. C. P. H. Gamage
Summary: The study focused on the punching shear failure of slab-column connections and the effectiveness of using CFRP for retrofitting to enhance punching shear capacity. The results showed enhancements in punching shear capacity ranging between 20% and 90% after retrofitting damaged connections.
COMPOSITE STRUCTURES
(2021)
Article
Construction & Building Technology
Binh T. Luu, Cuong Ngo-Huu, Long Nguyen-Minh
Summary: This paper investigates the punching shear resistance and deformation capacity of unbonded post-tensioned concrete (UPC) slab - concrete-filled steel tube (CFT) column joints using proposed innovative connections. Experimental results showed that the UPC slab - CFT column specimens using the proposed innovative connections had higher punching shear resistance, ultimate deformation, and energy absorption capacity compared to the control specimen. The stiffness in the elastic stage before concrete cracking of the UPC slab - CFT column specimen was slightly larger than that of the control specimen, but decreased rapidly in the post-cracking stage.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Yueqiao Jia, Jeffrey C. L. Chiang
Summary: Shear reinforcement is a common method to strengthen slab-column connections. This study investigates the reduction effect of shear reinforcement on bending moment in unbalanced conditions. Through nonlinear finite element analysis, the study explores the effects of shear reinforcement quantity, diameter, and loading methods on the slab. A corrected moment transfer coefficient formula is proposed for more accurate calculations.
APPLIED SCIENCES-BASEL
(2022)
Article
Construction & Building Technology
Patrick Michel Beaulieu, Maria Anna Polak
Summary: This paper presents a rational approach for calibrating a NLFEA model in ABAQUS using interior and edge slab-column connection specimens, to enhance the existing experimental database and formulate rational design recommendations for future codes.
JOURNAL OF STRUCTURAL ENGINEERING
(2023)
Article
Construction & Building Technology
Saumyaranjan Sahoo, Bhupinder Singh
Summary: The experimental study on punching shear behavior of recycled aggregate concrete slab-column specimens showed that the punching strengths increased with concrete compressive strength and the main shear crack inclination angle was relatively consistent across all specimens. The Eurocode 2 provided the most accurate and conservative predictions for the punching strengths of recycled aggregate concrete.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Construction & Building Technology
Jingzhe Li, Qihan Shen, Jingfeng Wang, Fengqin Wang, Guoqiang Li
Summary: This study investigates the effectiveness of externally bonding carbon-FRP for strengthening concrete-filled steel tube short columns with void defects. It proposes strength prediction formulas and provides insights into the strengthening mechanisms.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2024)
Article
Construction & Building Technology
Tianyao Liu, Xudong Qian, Wei Wang, Yiyi Chen
Summary: This article translates the ductile tearing process of welded joints made from circular hollow sections into the load resistance and strain levels, providing an interface between fracture-mechanics based assessments and engineering analysis and monitoring.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2024)
Review
Construction & Building Technology
Zhen Zhu, Yuliang Chen, Huiqin Wu, Peihuan Ye
Summary: This study investigated the shear capacity of solid-web H-shaped steel reinforced concrete (HSRC) columns under combined torque. Seven HSRC columns were tested, and the influence of different parameters on the shear capacity was analyzed. The results showed that the addition of H-shaped steel improved the shear capacity, while increasing the axial compression ratio increased the shear capacity. However, increasing the torsion bend ratio and shear span ratio decreased the shear capacity.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2024)
Article
Construction & Building Technology
Naizhou Zhang, Huatian Zhao, Lianjin Bao, Feng Zhou, Xiaoming Chen, Sheng Jiang, Gang Shi
Summary: This study focuses on the mechanical properties of butt welds in thick GJ steel plates and analyzes the differences between the weld specimens and the base metals in terms of static and cyclic mechanical properties.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2024)
Article
Construction & Building Technology
Xianzhong Zhao, Zhenyu Xu, Shen Yan
Summary: This study aims to reveal the mechanisms that determine the survival of suspended domes when subjected to sudden cable rupture. The results show that the remaining structure can arrest the initial local damage and establish an alternative path for hoop cables, thereby regaining balance. The relaxation of hoop cables can transmit outwards and inwards, causing severe damage and potential structural collapse. The failure of diagonal cables has minimal impact on the structure.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2024)
Article
Construction & Building Technology
Kathleen Lauwens, Barbara Rossi
Summary: This paper presents an experimental program that tests the behavior of fabricated stainless steel beams under combined bending and torsion. The test results are compared to elastic theory and highlight the overly conservative nature of current design rules.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2024)
Article
Construction & Building Technology
Sima Abolghasemi, Nicholas E. Wierschem, Mark D. Denavit
Summary: Structures susceptible to soft story mechanisms are particularly vulnerable to earthquakes. The strongback has been proposed as a way to prevent soft story mechanisms, but its impact on structural performance considering vertical stiffness irregularities and different arrangements of energy dissipation devices is unclear. This study investigates the effects of strongback on a small-scale four-story elastic structure with varying stiffness irregularities and damper arrangements. The results show that the strongback significantly reduces maximum story drift and makes the structural performance insensitive to damper position and distribution.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2024)
Article
Construction & Building Technology
Tran-Van Han, Jeong MoonSook, YongNam Kim, Dongkyu Lee, Nguyen-Vu Luat, Kihak Lee
Summary: This paper presents a new approach for steel modular structures, incorporating the S-CN connector and rectangular hollow section (RHS) steel members. The mechanical behavior of S-CN connectors and their application in beam-column connections under compressive loading are studied numerically and validated experimentally.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2024)
Article
Construction & Building Technology
Yong-li Tao, Xue-chun Liu, Xuesen Chen, Wen -bin Cui, Long-xin Guo
Summary: In this study, different weld details were proposed to improve the seismic performance of steel column splicing flange joints. Four full-scale specimens were tested under cyclic loads to analyze the hysteresis behaviors, yield moment, ductility, bolt forces, energy dissipation, stress and strains. Parametric analysis was conducted to discuss the influences of weld details, weld geometries, and flange openings. The results showed that different weld details had advantages in terms of ductility or energy dissipation capacity, bolt tension distribution, stress or strain distributions. Formulas for yield moments were proposed and validated for seismic design of bolted flange joints in prefabricated steel structures.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2024)
Article
Construction & Building Technology
Wanqian Wang, Jingfeng Wang, Xiao Peng, Lei Guo
Summary: This paper investigates the overall response of the lightweight EPS-filled cold-formed steel (CFS) shear wall structure to earthquake disasters. A simplified analysis model is established using a strut and tie-equivalent spring model. Nonlinear analysis is conducted to assess the seismic resilience of this type of residence. The research findings provide important guidance for the nonlinear analysis and seismic resilience assessment of this kind of building.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2024)
Article
Construction & Building Technology
Hui Zhao, Zhenhe Wang, Wenhao Zhang, Rui Wang, Dongdong Yang, Dennis Lam
Summary: In this study, the post-fire performance of round-ended recycled aggregate concrete-filled steel tubular (RE-RACFST) short columns was investigated through experiments and numerical simulations. The results showed that an increase in the recycled aggregate content led to a decrease in the bearing capacity and elastic stiffness of the RE-RACFSTs, as well as an earlier onset of the confining effect. Finite element models were also established and used to study the effects of key factors on the residual load-carrying capacity. Furthermore, a simplified formula was proposed to estimate the post-fire residual capacity of RERACFST stub columns.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2024)
Article
Construction & Building Technology
Chengjun Tan, Tao Sun, Hua Zhao, Lei Tu, Dongqin Qiao, Xudong Shao
Summary: By combining UHPC layer with steel plates and RC structures, the proposed strengthening method effectively enhances the shear capacity of pre-damaged RC beams. The experimental results demonstrate promising applications for strengthening old/defective bridges.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2024)
Article
Construction & Building Technology
Shujun Hu, Yuan Liao, Sizhi Zeng, Hai Huang, Yujie Yu
Summary: In this study, a new cross-section-type shear connector connection was proposed to improve the shear resistance in a prefabricated concrete frame-eccentrically steel brace structure. Experimental tests and numerical simulations were conducted, revealing that increasing the concrete strength, connector number, and connector section dimensions can enhance the shear stiffness and strength.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2024)
Article
Construction & Building Technology
Yong Wang, Yong Du, Shaojun Zhu, Lei Huang
Summary: This study investigated the influence of temperature on the anti-sliding performance of prestressed parallel wire strand clamps (PWSCs) through experiments and numerical analyses. The study found that the anti-sliding resistance of the clamps decreases at high temperatures, the fire resistance time decreases with higher thrusting load levels, and the bolt pretension also decreases.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2024)
Article
Construction & Building Technology
Hongbo Liu, Yixiao Zhou, Fei Wang, Yan Lu, Zhihua Chen
Summary: This study investigates the effects of low temperature and corrosion on the impact toughness of steel structures. It is found that both low temperature and corrosion can reduce the impact energy of the steel, with corrosion having a greater impact at low temperature.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2024)