Article
Construction & Building Technology
Xin Tang, Yuanlong Yang, Weiqi Yang, Joel Lanning, Yohchia Frank Chen
Summary: The seismic behavior of SCFSTFs with special-shaped CFST columns, H-shaped steel beams, and exterior diaphragm connections was investigated experimentally and numerically in this study. The results showed excellent seismic performance with minimal degradation in strength and rigidity, adequate energy dissipation capacity, and ductility. Increasing axial compression ratios improved energy dissipation capacity and horizontal load bearing capacity within the parametric range of the test.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Construction & Building Technology
Ji-Cheng Zhang, Xiao-Yu Liu, Lei Zeng, Guo-Feng Du, Jia-Hao Xiao
Summary: The study found that the cross-shaped steel tube has a positive effect on the performance of C-CFST columns, with different parameters exhibiting varying effects on column behavior. The columns have both advantages and disadvantages in terms of performance.
STEEL AND COMPOSITE STRUCTURES
(2021)
Article
Construction & Building Technology
Wang -Hui Liu, Yan-Lin Guo, Zi-Hao Tian, Jing-Yuan Li
Summary: This paper proposes a new type of irregular-shaped concrete-filled steel tube column to H-shaped steel beam joints, called inner semi-diaphragm connections. By conducting experiments and finite element analysis, it is found that the proposed connections can effectively improve the hysteretic behavior, bearing capacity, and stiffness of the column joints, and ensure that the beam begins to yield prior to joint failure. This research provides valuable reference for the engineering design of irregular-shaped CFST column-beam joints.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Engineering, Civil
Lihua Zhu, Qiujun Ning, Cheng Zhao, Cuiru Ji, Xinbo Pan, Wei Han
Summary: A novel self-centering circular concrete-filled steel tubular (CFST) column to steel beam connection with beam web friction device (WFD) and post-tensioned (PT) high-strength steel strands was developed and analyzed. Increasing the initial PT force or number of PT strands enhances self-centering capacity, while increasing pretension force in the friction bolts improves energy dissipation. Both experiment and simulation results demonstrate excellent self-centering and reasonable energy dissipating capacities of the connection.
Article
Chemistry, Multidisciplinary
Cristhian Ramirez Ortiz, Gilberto Areiza Palma, Albio D. Gutierrez Amador, Jose L. Ramirez Duque, Ruth E. Cano Buitron, Luis F. Gonzales Escobar
Summary: This paper investigates the seismic behavior of a steel beam-to-concrete-filled steel tubular column connection with external diaphragms. The results indicate that this connection exhibits good ductility and dissipation capacity, meeting the design requirements for earthquake resistance.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Civil
Xitong Dong, Lai Wang, Zhifeng Xu, Shangshang Guan, Liyuan Liu, Haitao Chen
Summary: In this study, a novel concrete-filled steel tubular (CFST) column to H-shape steel beam connection with side plate was proposed to improve the indoor utilization rate of steel frame structure residential buildings. Six specimens of 1/3 scale were tested to evaluate the hysteretic performance, failure mode, ductility, stiffness degradation, strength degradation, and energy dissipation capacity. The results showed that the connections exhibited sufficient energy dissipation capacity and excellent ductility. The finite element method (FEM) analysis confirmed the consistency between the test results and the analysis results.
Article
Construction & Building Technology
Fatemeh Jamali Paghaleh, Mohammad Ali Hadianfard, Hamed Saffari
Summary: Box columns in steel structures offer many advantages, but implementing continuity plates inside them has always been challenging. This research proposes using through beam connections to box columns as a possible solution, which removes the continuity plates and improves the connection performance.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2022)
Article
Engineering, Civil
Hanchao Liu, Jiping Hao, Qiang Xue, Xiaoling Sun
Summary: A new double side-plate I-beam connection to wall-type concrete-filled steel tubular columns was established and its seismic performance was investigated in this study. The models accurately predict the hysteretic behavior of the proposed joint type under constant axial and cyclic horizontal loads, showing favorable seismic performance of the connections.
THIN-WALLED STRUCTURES
(2021)
Article
Engineering, Civil
Lihua Zhu, Qiujun Ning, Wei Han, Cheng Zhao
Summary: This study demonstrates that the combination of superelastic NiTi shape memory alloy bolts and brass friction energy dissipation devices can effectively handle the residual drift and energy dissipation in traditional connections after an earthquake. The cyclic tests on concrete-filled square steel tubular connections showed that the superelastic connection exhibited excellent recentering ability and moderate energy dissipation capability. The self-centering capacity of the connection increases with an increase in the pre-strain of the NiTi bolts, and the energy dissipation capacity increases with an increase in the pre-tension force in the friction bolts.
THIN-WALLED STRUCTURES
(2023)
Article
Construction & Building Technology
Huiwen Tian, Zhen Zhou, Yang Wei, Lingxin Zhang
Summary: The CFUT columns showed good seismic performance with continuous contribution of the UHPC jackets to the load-bearing capacities; the widespread multi-cracking behavior due to steel fiber bridging effect resulted in improved deformation capacity in CFUT columns.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Construction & Building Technology
Binyang Li, Yuanlong Yang, Jiepeng Liu, Xianggang Liu, Yu Cheng, Yohchia Frank Chen
Summary: A novel U-shaped diaphragm connection was introduced to transfer moment between special-shaped CFST columns and steel beams, meeting design code requirements. Experimental and finite element analysis provided insights into strength, ductility, and strain distribution of the connections, as well as the influence of U-shaped diaphragm size, tube thickness, and axial load ratio of the column.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Construction & Building Technology
Shuang-Long Yang, Lei Zhang, Jia-Wei Zhang, Bo Fu, Gen-Shu Tong, Ting Jing
Summary: This paper investigates the behavior of concrete-filled wide rectangular steel tube columns with an aspect ratio of cross-section greater than 2.0 under combined constant axial compression and cyclic lateral loadings. The failure modes, hysteresis curve, skeleton curve, ductility, lateral stiffness, and energy dissipation capacity of the specimens were analyzed and discussed. The study concludes that the solution of EC4 can provide safe predictions for these columns.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2022)
Article
Construction & Building Technology
Cristhian Ramirez Ortiz, Albio D. Gutierrez Amador, Jose L. Ramirez Duque
Summary: The seismic behavior of a novel steel beam-to-concrete-filled steel tubular column connection with external diaphragms was evaluated using a finite element method model. The model was validated with experimental results and found suitable for use in high seismic threat areas. A monotonic test was used to qualify the connection and the model underwent two stages of simplifications to reduce computational time. The simplified model was used in a parametric study and all profiles met seismic performance requirements.
Article
Construction & Building Technology
Dan Gan, Yaojun Zhang, Xuhong Zhou, Ziyu Ba, Dongxu Li, Zhaoxin Hou, Brian Uy
Summary: In this study, a demountable connection using Hollo-Bolts was proposed to connect the upper and lower concrete-filled steel tubular columns. Six specimens were designed to study the seismic performance, and the results showed that the connection exhibited good ductility performance and could be easily dismantled and reassembled without affecting its seismic performance. The load-transfer mechanism was explored and simplified formulae of anti-slip flexural bearing capacity were proposed, which were in good agreement with the test results.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2023)
Article
Construction & Building Technology
Xi Chen, Jianyang Xue, Hechao Li, Xin Lu, Guangxu Tu
Summary: The experimental and analytical methods were used to study the elastoplastic shear behavior of special-shaped CFST joint and develop damage models for its joint. It is found that shear failure occurs in the panel zone and the joint's shear force-lateral displacement hysteretic curves and stress distribution are obtained. The joint is divided into individual components, and shear resistance models are presented for the webs, steel frame, and core concrete to accurately calculate their shear resistances.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2023)
