Article
Construction & Building Technology
Hua Huang, Min Huang, Wei Zhang, Mengxue Guo, Zhen Chen, Ming Li
Summary: This study investigated the strengthening effectiveness of two reinforced concrete frames, showing that the stiffness and bearing capacity of the frames increased after strengthening. Increasing the quantity of steel strands significantly raised the peak load, and stiffness in different floors affected load distribution, with decreased axial compression on diagonal columns after strengthening.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Construction & Building Technology
Xiang-Lin Gu, Bin Zhang, Xiao-Kun Huang, Xiao-Lin Wang
Summary: This paper presents the testing results of twelve 1/4-scale precast concrete substructural specimens under progressive collapse scenario and compares them with conventional reinforced concrete subassemblies. The study investigates various beam-column connections, as well as the effects of transverse beam and composite slab on the performance of precast concrete structures. The results show that precast concrete specimens with or without precast composite flanges exhibit similar progressive collapse resistance as reinforced concrete specimens in the literatures, with the exception of the peak value of vertical load at the compressive arch action stage for a specific beam splice condition. The study also reveals that the transverse beam and composite slab effects can significantly increase the capacity of precast concrete two-span beams. However, the fully assembled concrete specimens do not fully develop compressive arch action and tensile catenary action due to rebar pull-out failure or premature failure of the welding points between steel plates and rebars.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Construction & Building Technology
Xiang-Lin Gu, Bin Zhang, Ying Wang, Xiao-Lin Wang
Summary: This paper examined the progressive collapse-resisting mechanisms of RC floor systems through experiments and analysis, finding that the presence of beam flanges can significantly enhance the resistance of specimens, and the splice length of bottom bars in beams meets the requirements of Chinese code specifications and plays an important role in improving collapse resistance capacity.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Engineering, Civil
Huiyun Qiao, Xinyu Xie, Yu Chen
Summary: This study proposes a novel principle of using web openings and kinked reinforced bars to improve the preventive strategies for frame structures. Experimental and numerical investigations evaluate the factors affecting the kinked reinforced bars and their roles in the frame structures. The results indicate the importance of kinked reinforced bars in catenary action and suggest selecting the kinked height based on the deformation capacity of the beam.
ENGINEERING STRUCTURES
(2022)
Article
Engineering, Civil
Hua Huang, Min Huang, Wei Zhang, Mengxue Guo, Boquan Liu
Summary: This study focused on testing and analyzing a two-story reinforced concrete frame with the loss of one edge column to understand its progressive collapse behavior. The research also investigated the contribution of beams and slabs to the load resistance of multistory 3D frames, finding that beams contribute approximately 2/3 and slabs contribute approximately 1/3 to the load resistance.
STRUCTURE AND INFRASTRUCTURE ENGINEERING
(2022)
Article
Engineering, Civil
Huiyun Qiao, Xinyu Xie, Juhuan Zheng, Zhiquan Xing, Yu Chen, Jianpeng Wei
Summary: This study developed a new principle of beam-to-column connections, which improved the ductility of the structure and enhanced the seismic performance of steel-frame structures by arranging openings at the beam flange to form a flange-opening section (FO).
ENGINEERING STRUCTURES
(2023)
Article
Construction & Building Technology
Ying Wang, Bin Zhang, Xiang-Lin Gu, Feng Lin
Summary: This paper investigates the load carrying mechanisms in resisting progressive collapse for reinforced concrete (RC) structures, taking into account the transverse beam and slab effects. The test results demonstrate that the transverse beam and slab effects can significantly increase the load-carrying capacity of two-span beams. Thus, it is important to consider these effects in the simulation of progressive collapse for RC frame structures.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Construction & Building Technology
Xing-Ju Yang, Feng Lin, Xiang-Lin Gu
Summary: The study proposes a novel method to enhance the catenary action of RC frame structures by embedding locally debonded rebars near beam ends. Test results showed a significant increase in vertical resistance with the proposed method, compared to conventionally designed substructures. The locally debonded rebars were found to improve the ultimate rotation capacities and axial tension forces in beams, leading to the development of catenary action.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Construction & Building Technology
Xian Rong, Xiuchen Xu, Yansheng Du
Summary: The study focuses on the significance of beam-to-column connection configurations in structural resistance and ductility under middle column-removal scenarios. Through full-scale laboratory tests on two steel frame assemblies with different connection details, it is found that the use of enhanced bolted connection details can improve the vertical load capacity.
ADVANCES IN STRUCTURAL ENGINEERING
(2021)
Article
Engineering, Civil
Huiyun Qiao, Zhuangzhuang Guo, Yu Chen
Summary: This paper presents experimental and numerical investigations of a substructure with castellated steel beams under a column removal scenario. The results provide important insights into improving the resistance of steel structures against progressive collapse.
ENGINEERING STRUCTURES
(2022)
Article
Engineering, Civil
Mohammed Alrubaidi, S. A. Alhammadi
Summary: This study investigates the effectiveness of masonry infill walls on steel frames with different beam-column connections under progressive collapse. The findings show that infill walls considerably improve the steel building's structural strength and energy dissipation against progressive collapse.
Article
Construction & Building Technology
Zhaochang Zhang, Zhuo Xi, Weihong Qin
Summary: This study proposes an evaluation method to distinguish the types of structural anti-progressive collapse performance, and applies it to 75 existing beam-column structures to reveal potential catenary action. An innovative tension-bending catenary (TBC) model is proposed to predict the catenary peak capacity, displacement, and horizontal resultant force. Parametric analysis shows that the catenary capacity is positively correlated with the beam top longitudinal reinforcements. Practical anti-progressive collapse strategies are summarized and proposed.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
Zhiqiang Wu, Zhijun Xu, Huiyun Qiao, Yu Chen, Long Chen, Weiyu Chen
Summary: A new type of joint with Z-type cantilever beam splices was proposed for assembled steel frame structures. The effects of reducing beam section and beam web on the anti-progressive collapse performance of assembled steel frame joints were studied. The test results showed that the Z-RBS specimen had the best performance. Increasing the distance from the cantilever beam splices to the middle column and reducing the bolt aperture improved the bearing capacity and ductility of the structure.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2022)
Article
Construction & Building Technology
Yuan Huang, Yuxuan Tao, Weijian Yi
Summary: To investigate the influence of various tendon profiles on the progressive collapse behavior of unbonded prestressed concrete (PC) beam-column assemblies, one reinforced concrete and four PC beam-column assemblies were designed and tested. The results showed that the prestressed tendons play a crucial role in the development of compressive arch action (CAA) and catenary action (CA) mechanisms, and the profile of the tendons significantly affects the overall behaviors of PC frames. The increase in prestressing force improves the CAA resistance but has a negative impact on the CA mechanism, and the crack patterns and failure modes vary among PC specimens, with uniform distribution of tensile cracks enhancing the deformation and CA capacities against progressive collapse.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Ecology
Jingsong Huang, Lu Wang
Summary: This paper presents experimental and numerical investigations on the progressive collapse behavior of a two-story glulam frame when exposed to fire. Experimental results show that the failure time of the middle column is 16.8 min, and the time to determine the progressive collapse is 17.17 min. Numerical simulation results agree well with the experimental results, revealing the mechanism of frame collapse due to the catenary effect.
Article
Construction & Building Technology
Huiyun Qiao, Caisong Lu, Jianpeng Wei, Yu Chen
JOURNAL OF PERFORMANCE OF CONSTRUCTED FACILITIES
(2020)
Article
Engineering, Civil
Canwen Chen, Huiyun Qiao, Jinpeng Wang, Yu Chen
ENGINEERING STRUCTURES
(2020)
Article
Engineering, Civil
Shentong Lin, Huiyun Qiao, Jinpeng Wang, Jiahao Shi, Yu Chen
Summary: This paper investigates the anti-collapse performance of moment resisting frames with reduced-web-section connections under critical column removal scenario. Experimental results show that specimens with openings can develop better deformability and rotational capacities when the dimensions and location parameters of the opening are controlled within a suitable range.
ENGINEERING STRUCTURES
(2021)
Article
Construction & Building Technology
Huiyun Qiao, Yu Chen, Jinpeng Wang, Canwen Chen
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2020)
Article
Engineering, Civil
Huiyun Qiao, Jiahui Pan, Yu Chen, Jike Pan
Summary: An experimental investigation was conducted to evaluate the axial compressive behavior of circular hollow section (CHS) stub columns with initial crack defects. The study found that initial cracks accelerated local buckling and changed both the bearing capacity and deformation capacity of the columns. The ultimate loads of the stub columns increased with the tube thickness, slightly decreased with an increase in the long crack length, and decreased with an increase in crack spacing.
THIN-WALLED STRUCTURES
(2021)
Article
Construction & Building Technology
Jian-peng Wei, Li-min Tian, Yang Guo, Hui-yun Qiao, Yu Bao, Zhi-an Jiao, Xiao-jun Shi
Summary: A novel double-hinge steel frame joint was developed in this study, with validated finite element analysis proving its reasonable design and good seismic performance. Simulation results showed that the novel double-hinge joint in steel frame structures has better energy dissipation and seismic performance.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2021)
Article
Construction & Building Technology
Shentong Lin, Jinpeng Wang, Huiyun Qiao, Yu Chen, Yang Zhou
Summary: This study investigated the impact of different bolt arrangements on the anti-collapse performance of double half-span assemblies, and found that increasing the number of bolt rows is an effective approach to enhancing the connections' resistance to collapse.
JOURNAL OF STRUCTURAL ENGINEERING
(2021)
Article
Engineering, Civil
Huiyun Qiao, Mingfeng Zhang, Zhongcun Liu, Yu Chen, Huasheng Qiu, Zheng Wang
Summary: The research found that initial cracks accelerated local buckling and affected the bearing and deformation capacities of SST columns. The ultimate load of steel tubes increased with an increase in tube thickness and slightly decreased with an increase in crack length. Additionally, the effects of crack number and spacing on bearing capacity were complex and had a coupling relationship with tube thickness.
Article
Engineering, Civil
Huiyun Qiao, Zhuangzhuang Guo, Yu Chen
Summary: This paper presents experimental and numerical investigations of a substructure with castellated steel beams under a column removal scenario. The results provide important insights into improving the resistance of steel structures against progressive collapse.
ENGINEERING STRUCTURES
(2022)
Article
Engineering, Civil
Huiyun Qiao, Xinyu Xie, Yu Chen
Summary: This study proposes a novel principle of using web openings and kinked reinforced bars to improve the preventive strategies for frame structures. Experimental and numerical investigations evaluate the factors affecting the kinked reinforced bars and their roles in the frame structures. The results indicate the importance of kinked reinforced bars in catenary action and suggest selecting the kinked height based on the deformation capacity of the beam.
ENGINEERING STRUCTURES
(2022)
Article
Construction & Building Technology
Shentong Lin, Xiaolei Xue, Huiyun Qiao, Yu Chen
Summary: In this study, a link element model incorporating a nonlinear PVM yield function was established to investigate the static response of idealized beams with reduced web section under column loss. The model can predict the load-displacement relationship before failure and analyze the internal force evolution of web opening beams.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2022)
Article
Construction & Building Technology
Huiyun Qiao, Jian Xia, Yu Chen, Canwen Chen, Juhuan Zheng
Summary: A novel principle is proposed to improve the performance of RBS connections by installing kinked reinforced bars. Experimental and numerical investigations show that the kinked reinforced bars can be effective in RBS connections, and their performance can be adjusted based on the diameter, kinked height, and length of the reinforced bars.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2022)
Article
Construction & Building Technology
Jian-peng Wei, Li-min Tian, Yang Guo, Hui-yun Qiao, Zhi-an Jiao, Yu Bao
Summary: This study investigated a double-hinge steel frame joint with a replaceable T-shape energy dissipator through testing and finite element analysis. The seismic performance of the joint was verified to be better than a traditional welded joint, and the accuracy and reliability of the earthquake-resilient design were demonstrated. The energy dissipators had a high energy dissipation efficiency, and the earthquake-resilient function was validated. The low weight of the joint was determined through validated finite element analysis, improving the application of this novel earthquake-resilient joint.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2022)
Article
Engineering, Civil
Han Zheng, Huiyun Qiao, Yu Chen, Bo Yang, Bin Zhu, Lifang Lai
Summary: This paper investigates the resistance to progressive collapse of weakened beam-column joints through experiments and numerical simulations on cellular joints with different opening shapes. The results show that the load carrying capacity and deformation capacity of cellular joints have different degrees of improvement compared to traditional joints, with hexagonal openings exhibiting the best performance. Changing the opening weakening parameters can effectively improve the failure mode and load carrying capacity of the specimens. It is recommended to increase the values of parameters a and c and reduce the value of parameter b in the design of collapse resistance.
Article
Engineering, Civil
Huiyun Qiao, Xinyu Xie, Juhuan Zheng, Zhiquan Xing, Yu Chen, Jianpeng Wei
Summary: This study developed a new principle of beam-to-column connections, which improved the ductility of the structure and enhanced the seismic performance of steel-frame structures by arranging openings at the beam flange to form a flange-opening section (FO).
ENGINEERING STRUCTURES
(2023)
