Article
Engineering, Civil
Tao Wang, Kai-Yuan Xu, Yi-Zhou Zhang, Yan-Sheng Liu, Lei Guo, Xi Chen, Xiao-Ting Wang
Summary: This paper presents an experimental study on the seismic behavior of the joint between a steel-truss viaduct and reinforced concrete seismic walls in connected structures. The seismic performance of the joint was evaluated based on strength degradation, rigidity degradation, ductility, and energy dissipation capacity. The experimental results showed that the truss-wall joint can effectively transfer seismic loads, but the welding between the embedded column and chord needs careful treatment.
Article
Engineering, Civil
Farnoush Pishgahi, Touraj Taghikhany
Summary: Rubber bearings in seismic isolated structures are modeled by shear and axial springs, but end-rotation affects their performance. Previous models do not apply to high damping elastomeric bearings or lead rubber bearings with nonlinear behavior. This study introduces an improved mechanical model to simulate the interaction between nonlinear shear deformation and end-rotation. The results of a sensitivity analysis show that axial load and shear deformation have a reverse effect on rotational stiffness, and end rotation affects shear force significantly.
Article
Construction & Building Technology
Ruolin Ruan, Muhuo Lai, Chen Jiang, Jinbing Wang, Yong Lin
Summary: This paper explores the lifting project of a steel structure corridor in Quanzhou City, focusing on mechanical response, safety, stability, and construction guidance under wind load conditions. Measures to prevent accidents and challenges in stability are analyzed, and the importance of stress distribution and deformation during lifting is emphasized. Additionally, construction control measures and scientific recommendations are provided.
Article
Engineering, Civil
Yang Xiang, Meng Wang, Fei-Fei Sun, Guo-Qiang Li
Summary: A high-rise structure's seismic performance can be improved by replacing the rigid link between the shear and flexural subsystems with a viscoelastic connection. This novel configuration, called the VeSF structure, exhibits reduced acceleration and modified displacement response due to increased flexibility and damping. The research findings show that the acceleration of a VeSF structure can be 20-40% smaller than that of a conventional structure, while the drift of the shear subsystem moderately increases at the bottom and significantly decreases at the near-top zone.
ENGINEERING STRUCTURES
(2023)
Article
Green & Sustainable Science & Technology
Marek Johanides, Lenka Kubincova, David Mikolasek, Antonin Lokaj, Oldrich Sucharda, Petr Mynarcik
Summary: Initially, timber was underestimated as a building material, but with increasing awareness of ecological issues and environmental pollution, wood is gaining more attention as a sustainable material. New wood-based composite materials and joints for timber structures are being developed to enhance load capacity and stiffness. This article specifically focuses on improving frame connections in timber structures using mechanical fasteners to simplify assembly and improve rigidity.
Article
Engineering, Civil
Kang Zhou, Qiu-Sheng Li
Summary: This paper presents a systematic investigation of the vibration mitigation performance of an active tuned mass damper (ATMD) system on a super high-rise building during seven tropical storms. The measurements show that the ATMD system can effectively suppress the acceleration responses of fundamental sway modes of the building, but has marginal effects on higher modes. It also investigates the effects of the ATMD system on structural dynamic properties of the building. The results provide useful guidance for the design of vibration control devices and wind-resistant design of super high-rise buildings.
ENGINEERING STRUCTURES
(2022)
Article
Acoustics
Yang Liu, Yan-wei Xu, Zhi-hao Wang
Summary: This study proposes using internal high damping rubber dampers and external negative stiffness dampers to control the multi-mode vibration of long stay cables. Through complex modal analysis and parametric studies, different coupling schemes are found to provide better control effects in different modal ranges, offering a diversified solution for multi-mode damping enhancement.
JOURNAL OF LOW FREQUENCY NOISE VIBRATION AND ACTIVE CONTROL
(2023)
Article
Chemistry, Multidisciplinary
Dae-Hyun Chung, Jeong-Hun Won
Summary: The rotational stiffness of pocket-type connections used in system scaffolding was evaluated through load tests on 30 specimens. The failure shapes of connections varied depending on the rotation direction. The maximum moment capacity was highest for upward rotation, followed by downward rotation and lateral rotation. The pocket-type connections can be considered semi-rigid connections for downward or upward rotation, and nominal pin connections for lateral rotation. The rotational stiffness of the connections can be estimated as a bilinear model.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Civil
Botan Shen, Weibing Xu, Jin Wang, Yanjiang Chen, Weiming Yan, Jianhui Huang, Zhenyun Tang
Summary: This study validated through shaking table tests that the application of double-layer tuned particle damper in super high-rise structures can effectively reduce dynamic responses, especially showing better damping performance under long-period ground motion.
EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS
(2021)
Article
Engineering, Civil
Lianguang Jia, Qiurong Li, Ran Bi, Yang Dong
Summary: This study explores the design concept of plastic hinges in steel frame structures with steel beam-to-column end-plate connections by strengthening the end-plate area, focusing on factors like end-plate thickness, opening diameter, position, and type that impact the mechanical properties and failure modes of joints. The research indicates that a castellated steel beam-to-column end-plate connection can realize the occurrence of a plastic hinge and exhibit good ductility and load-bearing performance. The study also proposes a method for calculating the initial rotational stiffness of the connection to achieve good accuracy.
Article
Construction & Building Technology
Liang-Dong Zhuang, Yue Yang, Yi-Fan Li
Summary: This study develops a new type of metallic damper to increase the energy dissipation capacity and deformation capacity of beam-column connections, and save space in frame structures. An experimental study is conducted to verify the behavior of the rotational metallic damper, and it is found to significantly improve the seismic performance of the structure. The rotational damper exhibits high rotational capacity and excellent energy dissipation capacity.
JOURNAL OF STRUCTURAL ENGINEERING
(2022)
Article
Engineering, Civil
Mahmoud T. Nawar, Ehab B. Matar, Hassan M. Maaly, Ahmed G. Alaaser, Osman Hamdy
Summary: This paper presents an extensive parametric study on the rotational stiffness of flexible base connections using ABAQUS program. The study compares the results obtained through the whale optimization algorithm (WOA) and the classical genetic algorithm (GA). The findings indicate that WOA is capable of obtaining the optimal equation for the moment-rotation relation, which accurately simulates the actual rotational stiffness.
STRUCTURAL ENGINEERING AND MECHANICS
(2023)
Article
Construction & Building Technology
Wenchen Shan, Xuchuan Lin, Xuhong Zhou, Biqin Dong
Summary: This study analyzed the seismic responses and collapse risks of 590-m-high BMFCT structures with and without the outrigger truss (OT) system. The results showed that the OT system can reduce top displacements and story drift ratios, but has a negative effect on lateral deformations and collapse resistance capacity.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Engineering, Civil
Qinhua Wang, Huarui Tian, Haoshuai Qiao, Nayan Deep Tiwari, Quan Wang
Summary: A novel passive control device, TLCDI, is developed to reduce wind-induced responses of adjacent high-rise buildings utilizing liquid sloshing and inerter mass amplification effects. Results show that TLCDI can significantly decrease wind-induced acceleration responses of linked buildings in the across-wind direction, outperforming traditional tuned liquid column dampers (TLCDs).
ENGINEERING STRUCTURES
(2021)
Article
Construction & Building Technology
Guoqiang Fu, Yong Quan, Ming Gu, Zifeng Huang, Chengdong Feng
Summary: Field measurement is the most reliable method for assessing wind effects on super high-rise buildings. In this study, the wind-induced acceleration responses of the Shanghai World Financial Center during four consecutive typhoons were systematically investigated. The analysis included the determination of modal directions, identification of natural frequencies and damping ratios, and analysis of amplitude dependencies and time-varying characteristics. The performance of the active tuned mass damper system during typhoons was also discussed. The study concluded that the building had satisfactory occupant comfort and no evident structural damage during the typhoons.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Engineering, Civil
Wei Guo, Zhipeng Zhai, Yao Cui, Zhiwu Yu, Xiaoli Wu
ENGINEERING STRUCTURES
(2019)
Article
Construction & Building Technology
Wei Guo, Zhipeng Zhai, Zhiwu Yu, Feng Chen, Yongzhi Gong, Tao Tan
ADVANCES IN CIVIL ENGINEERING
(2019)
Article
Construction & Building Technology
Wei Guo, Zhipeng Zhai, Hanfeng Wang, Qiongxiang Liu, Kai Xu, Zhiwu Yu
STRUCTURAL DESIGN OF TALL AND SPECIAL BUILDINGS
(2019)
Article
Engineering, Geological
Zhipeng Zhai, Wei Guo, Wenqian Chen, Zhiwu Yu, Chen Zeng, Shu Li
Summary: Metallic yielding damper is widely used in retrofitting steel moment-resisting frames to enhance seismic resilience, but can fail under strong earthquakes. Analyzing the impact of damper failure on seismic losses, it was found that neglecting damper failure can significantly underestimate collapse and demolition probability, although it has minimal effect on expected annual losses.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2021)
Article
Construction & Building Technology
Wei Guo, Shu Li, Zhipeng Zhai, Zhiyang Li, Sui Tan, Faxing Ding
Summary: The novel replaceable metallic energy dissipation device VYSSD can easily replace consumption plates after earthquakes, dissipating energy through flexural plasticity. It exhibits good low cycle fatigue performance and desirable displacement capacity. The device's seismic performance is enhanced and the failure mode is dominated by fatigue crack propagation.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Construction & Building Technology
Zhipeng Zhai, Yanhui Liu, Wei Guo, Feng Chen, Zhiwu Yu, Fulin Zhou
Summary: This paper introduces a new type of rocking shear wall with a dual self-centering energy dissipation system for improved seismic resilience. Through mechanical models, numerical analyses, and design principles, the performance of this structure is verified and specific design parameters are suggested.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Chemistry, Physical
Feng Chen, Zhiwu Yu, Yalin Yu, Zhipeng Zhai, Qun Liu, Xiao Li
Summary: In the era of energy conservation and environmental protection, precast concrete (PC) structures have been developed and increasingly applied in construction industries due to their advantages of outstanding workability and ecofriendliness. This study aimed to verify the reliability of overlapping U-bar loop connections and a modified form of these connections, and study the seismic performance of PC wall-beam-slab joints with these connection methods. Based on the experimental results, the conclusions showed that the overlapping U-bar loop connection and its modified form are effective and reasonable, and the modified connection form demonstrated slightly better mechanical properties. The research also provided guidance for assembling wall-beam-slab joints in PC shear wall structures.
Article
Engineering, Civil
Zhipeng Zhai, Yanhui Liu, Wei Guo, Oya Mercan, Huating Chen, Fulin Zhou
Summary: Current design methods for seismic resilience only consider typical earthquake scenarios and do not account for the risk of extremely rare earthquakes. This paper proposes a new design method that incorporates two-level yielding dampers to enhance the resilience of structures against rare earthquakes. Numerical analysis confirms the effectiveness of the proposed method.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Geological
S. Zou, C. B. Zhang, H. S. Wenliuhan, Z. Y. Yang, Y. H. Liu, Z. P. Zhai, H. Feng
Summary: This paper proposes a precast hollow concrete bridge double column with shallow socket connection (PHCBDCSS) for rapid construction of high-speed railway bridge structures. The mechanical properties and reliability of PHCBDCSS under earthquake excitations are investigated through full-scale pier in-situ pseudo-static tests and numerical simulations. The results show that the socket connection of PHCBDCSS effectively transfers the applied load and meets the design requirements. The performance of PHCBDCSS is similar to cast-in-place integral piers when the ratio of connection joints' stiffness to pier columns' stiffness exceeds 10.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2023)
Article
Construction & Building Technology
Zhipeng Zhai, Wei Guo, Yanhui Liu, Shuang Zou, Fulin Zhou
Summary: This paper proposes a new precast self-centering rocking shear wall system (PSCRSW) to enhance the seismic resilience of steel moment resisting frames (SMRF). The mechanical behavior of the pre-pressed disc spring friction damper (PDSFD) used in the system is investigated and simulated. The paper derives a theoretical model for the PSCRSW and validates it through numerical analysis, comparing its hysteretic performance with that of a conventional RC shear wall. The paper also presents design principles and suggestions for the PSCRSW and proposes an efficient seismic resilient design method for SMRF.
Article
Engineering, Geological
Shaohui Liu, Lizhong Jiang, Wangbao Zhou, Jian Yu
Summary: This study evaluates the post-earthquake damage to track-bridge systems by conducting nonlinear time history analysis on a CRTS II ballastless track simply-supported beam system subjected to transverse earthquake loading. It explores the characteristics of residual displacement and stiffness degradation of the track-bridge system under transverse earthquakes. The research investigates the effect of earthquake-induced stiffness degradation on high-speed trains and proposes a reconstruction method for earthquake-induced dynamic irregularity characteristic curve considering probability guarantee rates. The results indicate that earthquake-induced dynamic irregularity can effectively quantify the running performance of high-speed trains under earthquake-induced stiffness degradation conditions.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Rui Zhang, Xiangqian Sheng, Wenliang Fan
Summary: This study introduces a novel approach for the probabilistic assessment of seismic earth pressure against nonlinear backfills. Nonlinear upper bound analysis is used to obtain the seismic earth pressure through optimization procedure, and probability analysis of nonlinear backfill properties is considered by combining adaptive dimension decomposition with the direct integral method.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Qiangqiang Sun, Yu Xue, Menghao Hou
Summary: This study investigated the use of Tire-derived aggregate (TDA) as backfill material for geotechnical seismic isolation in utility tunnels. Nonlinear numerical analyses were conducted, and the results showed that TDA backfill was an excellent alternative for risk mitigation during strong earthquakes, significantly reducing deformation and forces. The proposed system could potentially save costs compared to expensive seismic mitigation measures.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Yan-Guo Zhou, Dong-Chao Zhang, Kai Liu, Yun-Min Chen
Summary: This study investigated the large deformations caused by liquefaction in sloping ground and the methods for evaluation and mitigation. Soil element tests and centrifuge model tests were conducted to study the relationship between residual strain and Post-liquefaction Deformation Potential (PLDP). The tests showed that the developments of residual strain were controlled by PLDP, which is correlated with the maximum cyclic shear strain. The applicability of PLDP was verified in model tests, and the mitigation mechanisms of densification and drainage induced by stone columns were observed.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Jiajin Zhao, Zhehao Zhu, Dexuan Zhang, Hao Wang, Xi Li
Summary: This paper studies the fabric properties during sand liquefaction using 3D constant-volume cyclic triaxial DEM tests. The results show good consistency with experimental data. The evolution of fabric characteristics is assessed using the coordination number and mechanical coordination number. The second-order contact normal fabric tensor is introduced to analyze complex inter-particle contacts and the shear strain is used as a bridge to describe the evolution of coordination number and anisotropy degree.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Jinqiang Li, Zilan Zhong, Shurui Wang, Kaiming Bi, Hong Hao
Summary: The corrosion-protection liner technology improves the seismic performance of water supply pipelines and reduces the failure probability under earthquake excitations.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Abdellah Cherif Taiba, Youcef Mahmoudi, Mostefa Belkhatir
Summary: This article provides a comprehensive analysis of Liu et al.'s (2023) published paper in the Soil Dynamics and Earthquake Engineering journal, which examines the impact of particle shape on the wave velocity of sand. By enhancing the content integrity, this article serves as a valuable discussion piece for readers interested in this research topic.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Weijian Zhong, Binbin Li, Yanhui Liu, Ping Tan, Fulin Zhou
Summary: In this paper, the Flexible Limit Protective Device (FLPD) was improved to a Flexible Energy Dissipating Device (FEDD) to better control the seismic response of base-isolated structures. Experimental investigation and numerical simulation were conducted to study the compression behavior and optimize the design of FEDDs. The results showed that FEDDs with optimal parameters effectively reduced isolator displacements and kept the inter-story drift angle within a safe range during earthquakes.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Xinhua Xue, Xiaojie Yuan, Li Tao
Summary: In this study, gene expression programming (GEP) was used to establish the relationship between the capacity energy required to trigger sand liquefaction and several major parameters. The GEP model showed higher accuracy and better performance compared to existing models, as confirmed by experimental data.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Xiao-ling Zhang, Hao Lan, Xian-hui Zhao, Cheng-shun Xu, Ke-min Jia
Summary: The study investigates the reinforcement principle of inclined liquefiable site using concrete pile and gravel pile methods. The results show that concrete piles have a better reinforcement effect on inclined liquefiable site compared to gravel piles, and increasing the diameter of gravel piles greatly improves the reinforcement effect. The pile group reinforcement model is more effective in reducing lateral displacement of the site soil compared to the single pile reinforcement model.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Jinxin Sun, Haoyu Sun, Mengmeng Lu, Bolin Han
Summary: The implementation of stone columns is an effective way to improve the stability of liquefiable soil. However, existing mathematical models often neglect vertical seepage within the soil, leading to calculation errors. This study proposes a new mathematical model that considers both radial and vertical seepage, and conducts a parameter analysis to investigate the effects of column spacing, cyclic stress ratio, and consolidation parameters on excess pore water pressure.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Jonathan F. Hubler, James P. Hanley, Andrew C. Stolte, Liam Wotherspoon, Kyle M. Rollins
Summary: This study performed blast liquefaction tests in an area that experienced extensive liquefaction. It used multi-channel analysis of surface waves (MASW) testing to evaluate changes in shear wave velocity (VS) before and after blasting. The study found that array length has an impact on the immediate changes in VS following blasting, but these changes decrease at 24 hours post-blast.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Lowell Tan Cabangon, Gaetano Elia, Mohamed Rouainia, Suraparb Keawsawasvong, Teraphan Ornthammarath
Summary: The impact of far-field earthquakes on underground structures, especially tunnels, has been relatively less explored compared to near-field earthquakes. However, the study found that far-field earthquakes can generate forces in tunnel lining that are equally destructive as those induced by near-field motions, especially when they contain long-period waves. The amplification of these ground motions in soft natural clays, common in Bangkok, can lead to significant soil displacements and shear strains.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Jinjun Hu, Longbing Ding, Xutong Zhou, Mingji Liu, Jingyang Tan
Summary: Offshore near-fault ground motions during the 2016 OffMie Mw6.0 earthquake in the Nankai Trough of Japan were studied using data from the DONET1 seafloor seismic network. The results show that offshore spectral acceleration and peak ground velocity are higher than onshore values. Analysis of pulse-like ground motions reveals differences in amplitude, frequency content, and energy between offshore and onshore motions. These findings have implications for seismic design of offshore engineering structures.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Radu Popescu, Pradipta Chakrabortty
Summary: The natural spatial variability of soil properties affects the mechanical response of geotechnical structures and can deviate failure surfaces. For soil liquefaction induced by seismic activity, it has been found that greater excess pore water pressure is generated in soils with small-scale variability. This paper provides an explanation based on centrifuge experiments and numerical simulations, showing that partial drainage during earthquakes may trigger softening of dilative soils.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
