Article
Construction & Building Technology
Yunbiao Luo, Yucai Zhao, Yuebo Chen, Xuchuan Lin, Jiabao Yan
Summary: This study investigates the seismic performance of square steel tubular columns filled with ultra-high performance steel fiber-reinforced concrete. The findings suggest that the seismic performance can be improved by decreasing the axial compression ratio and increasing the width-to-thickness ratio.
Article
Construction & Building Technology
Zongping Chen, Ji Zhou, Chenggui Jin
Summary: The seismic behavior of spiral stirrup-confined square concrete-filled steel tubular (SS-CFST) columns was investigated through experimental and numerical analysis. The results showed that the confinement effect of spiral stirrup effectively reduced concrete fragmentation, improved the ductility and energy dissipation of the columns.
JOURNAL OF BUILDING ENGINEERING
(2023)
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
Polymer Science
Yasser Alashker, Ali Raza
Summary: The large production of cement and the disposal of waste have significant environmental impacts. Therefore, it is crucial to study and develop sustainable concrete construction materials and methods. This study investigates the seismic efficiency of innovative concrete structural elements and finds that the percentage substitution of recycled coarse aggregate has a minor impact on seismic performance, while the compression-load ratio has a substantial impact.
Article
Construction & Building Technology
Zhuang Zhao, Yang Wei, Gaofei Wang, Yirui Zhang, Yu Lin
Summary: The ductility and axial load-carrying performance of square ultra-high-performance concrete-filled stainless-steel tubular (UHPCFSST) columns were compared with square UHPC-filled steel tubular (UHPCFST) columns. A database of square UHPCFST columns was constructed and a predictive model for the axial load-carrying capacity of both types of columns was established, showing high accuracy and rationality.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Civil
B. Shan, G. Liu, T. Y. Li, F. C. Liu, Z. Liu, Y. Xiao
Summary: The CFRPCT columns, featuring well-distributed cracks and higher performance compared to traditional confined concrete columns, show promising seismic performance in testing. Experimental and analytical models can predict the flexural strength of CFRPCT columns for improved earthquake resistance.
ENGINEERING STRUCTURES
(2021)
Article
Construction & Building Technology
Zheng Zhou, Xuhong Zhou, Biao Yan, Dan Gan
Summary: Compared to the extensive research on the compressive or flexural behavior of stiffened square concrete-filled steel tubular (CFST) columns, very few studies have been conducted on their shear behavior. Recent experimental results have demonstrated that the cyclic-shear behavior of CFST columns, especially those stiffened by diagonal ribs, welded on the adjacent sides of a square tube, exhibited significant improvement. This study uses detailed finite element analysis and parametric analysis to explore the shear mechanism and shear contribution of each component in the stiffened CFST column. The developed analysis method and established shear model accurately predict the shear strength of both stiffened and unstiffened square CFST columns.
JOURNAL OF BUILDING ENGINEERING
(2022)
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
Engineering, Civil
Zhe Wang, Jian Xie, Jia-Bao Yan
Summary: This study experimentally investigated the behavior of concrete-filled square GFRP tubular columns at low temperatures. The effects of low temperatures and eccentricities were evaluated using 20 CFSFT columns subjected to eccentric loads and two-point loading. Test results showed three stages in the load-displacement curves under eccentric loads and observed bilinear load-deflection curves under four-point bending. The ultimate axial load and ultimate bending moment of the CFSFT columns increased with decreasing temperature but with a decreasing increment as eccentricity ratios increased.
ENGINEERING STRUCTURES
(2023)
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
Engineering, Civil
Jiangang Wei, Haodong Ying, Yan Yang, Wei Zhang, Huihui Yuan, Jun Zhou
Summary: This study designed and created two 1:8 scale specimens to investigate the seismic performance of concrete-filled steel tubular (CFST) composite columns with ultra high performance concrete (UHPC) plates. The parameters for the pseudo-dynamic test study included ground motion characteristics, axial pressure ratio, plate material, and mainshock-aftershock sequences. The results showed that ground motion characteristics greatly influenced the seismic response of the specimen; the axial pressure ratio affected the yielding time and failure severity; using UHPC as the plate material improved the initial stiffness, delayed stiffness degradation, and increased hysteretic energy dissipation; under aftershocks, the specimen underwent elastic, elastoplastic, and plastic failure stages, with a seismic response and hysteretic energy dissipation comparable to the mainshock. These structures exhibited good seismic performance and could withstand multiple earthquakes.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Zongping Chen, Ji Zhou, Chenggui Jing, Qiuhong Tan
Summary: This paper presents an experimental study on compressive behavior of spiral stirrup reinforced concrete-filled square steel tubular (SSRCFSST) columns. The test results show that the spiral stirrup has excellent cooperation ability with square steel tube and concrete, and decreasing the spacing of spiral stirrup can enhance the axial bearing capacity and ductility of SSRCFSST columns. A composite model confined by square steel tube and spiral stirrup is established, with close correlations found between the calculated results and the experimental results.
ENGINEERING STRUCTURES
(2021)
Article
Construction & Building Technology
Yi Wang, Hong Huang, Jiantao Zeng, Wenbin Hu, Yingyao Cheng
Summary: A series of axial compressive tests were conducted on RCCAC cubes, prisms, and RCCAC-FSTs. The study examined the failure mechanisms, compressive strength, elastic modulus, and microstructure of RCCAC. The effects of cross-sectional type, steel content, confinement factor, and RCCA replacement ratio on the passive confinement effect of RCCAC-FSTs were investigated.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2023)
Article
Construction & Building Technology
Faesal Alatshan, Siti Aminah Osman, Abdelmajeed Altlomate, Mohammed Alkair, Roszilah Hamid, Fidelis Mashiri
Summary: This research collected and summarized a total of 455 experimental tests of axially loaded square and rectangular concrete-filled steel tubular (CFST) stub columns. The study found appreciable differences in the results obtained from the current design equations of four international standards, and proposed new empirical equations based on the four standard formulas and previous experimental data to provide more accurate estimations.
Article
Chemistry, Analytical
Guofeng Du, Zhao Li, Gangbing Song
Article
Chemistry, Multidisciplinary
Kui Gao, Zhao Li, Jiarui Zhang, Jianwei Tu, Xinping Li
APPLIED SCIENCES-BASEL
(2019)
Article
Chemistry, Multidisciplinary
Jiarui Zhang, Jianwei Tu, Zhao Li, Kui Gao, Hua Xie
APPLIED SCIENCES-BASEL
(2019)
Article
Materials Science, Multidisciplinary
Jianwei Tu, Zhao Li, Jiarui Zhang, Kui Gao, Jinpeng Liao, Jingwei Gao
FRONTIERS IN MATERIALS
(2019)
Article
Construction & Building Technology
Zhao Li, Jingwei Gao, Jindong Xu, Guofeng Du
ADVANCES IN STRUCTURAL ENGINEERING
(2020)
Article
Instruments & Instrumentation
Jianwei Tu, Jiarui Zhang, Zhao Li, Kui Gao, Muyu Liu
SMART MATERIALS AND STRUCTURES
(2020)
Article
Materials Science, Multidisciplinary
Jianwei Tu, Hua Xie, Kui Gao, Zhao Li, Jiarui Zhang
FRONTIERS IN MATERIALS
(2019)
Article
Mechanics
Kui Gao, Hua Xie, Zhao Li, Jiarui Zhang, Jianwei Tu
Summary: Eccentric loading tests on GFRP-RC slender columns revealed that some specimens did not meet serviceability criteria for lateral deflection and flexural crack width under service loads, while at peak load, the curvature range was similar to typical GFRP-RC beams. Experimental results were accurately reproduced by analytical models, validating their use in predicting eccentric behavior of GFRP-RC slender columns.
COMPOSITE STRUCTURES
(2021)
Review
Acoustics
Zhao Li, Jianwei Tu, Jiarui Zhang
Summary: This paper proposes an intelligent decentralized control method based on long short-term memory neural network for seismic response control of high-rise buildings. By utilizing decentralized control theory and Lyapunov stability theory, a long short-term memory network deep-learning framework is successfully established to construct different types of decentralized controllers. Simulation results on a 20-story benchmark building model show that the proposed method has good fault tolerance and can avoid the overall failure of the control system.
JOURNAL OF VIBRATION AND CONTROL
(2023)
Article
Chemistry, Physical
Jiarui Zhang, Yaoyang Zhu, Jianwei Tu, Zhao Li, Qiankun Wang
Summary: Tuned mass dampers (TMD) have limitations in vibration reduction effect due to the natural frequency of the main structure. This study proposed a frequency adjustable tuned mass damper (FATMD) based on magneto rheological elastomer (MRE) to track the natural frequency of the structure and achieve optimum tuning state, with the aid of Hilbert-Huang transform (HHT) and natural excitation technique (NExT). The experimental results showed that FATMD effectively tracked the natural frequency changes and achieved good vibration reduction effect.
Article
Construction & Building Technology
Zhao Li, Jiarui Zhang, Yaoyang Zhu, Jianwei Tu
Summary: This paper investigates the variation law of fatigue cracks on the vibration frequency and deflection of orthotropic steel bridge decks. The study establishes a steel box-girder segment model and a deck substructure model considering various typical fatigue cracks. Results show that the initiation and propagation of these cracks have little influence on the lower modes of the overall structure but significant influence on the high-order modes of the substructure. Additionally, the dynamic deflection response of the bridge changes as the damage progresses under vehicle load.
ADVANCES IN CIVIL ENGINEERING
(2022)
Article
Construction & Building Technology
Jiarui Zhang, Yaoyang Zhu, Zhao Li, Jianwei Tu
Summary: Currently, most common placement methods of actuators select optimal locations based on structural response and system energy, which neglect the controllability contribution and energy of seismic excitations, requiring a large number of calculations. To address this issue, this study combines the Clough-Penzien spectral model with the Luenberger observable normal form of the system to calculate the energy of each state. By considering modal energy and controllability, a novel optimal placement method based on modal controllability degree is proposed, dividing modes into main disturbance modes (MDMs) and secondary disturbance modes (SDMs). Results from optimal actuator placement and vibration control simulation on a 20-story building model demonstrate that the proposed method yields significantly better vibration reduction effect compared to the uniformly distributed actuators (Uniform method) and classical placement method based on system controllability gramian matrix (Classical method).
Article
Engineering, Civil
Renbing An, Jiacong Yuan, Yi Pan, Duhang Yi
Summary: Traditional timber structures built on sloped land are more susceptible to seismic damage compared to structures built on flat land. The upper portion of the structure is found to be the weak point on sloped land, with potential issues such as tenon failure and column foot sliding.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Elyas Bayat, Federica Tubino
Summary: The current design guidelines for assessing floor vibration performance do not consider the influence of variability in the walking path on the dynamic response of floors. This study investigates the dynamic response of floors under a single pedestrian walking load, taking into account the randomness of the walking path and load. The effectiveness of the current guidelines in predicting floor response is critically assessed.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Gao Ma, Chunxu Hou, Hyeon-Jong Hwang, Linghui Chen, Zhenhao Zhang
Summary: Minimizing earthquake damage and improving repair efficiency are the main principles of resilient structures. This study proposed a repairable column with UHPC segments and replaceable energy dissipaters. The test results showed that the columns with UHPC segments and replaceable dissipaters exhibited high strength, deformation capacity, and energy dissipation.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Kartheek S. M. Sonti, Pavan Kumar Penumakala, Suresh Kumar Reddy Narala, S. Vincent
Summary: In this study, the compressive behavior of alumina hollow particles reinforced aluminum matrix syntactic foams (AMSF) was investigated using analytical, numerical, and experimental methods. The results showed that the FE solver ABAQUS could accurately predict the elastic and elastio-plastic behavior of AMSFs. The study also suggested that FE models have great potential in developing new materials and composites under compression loading.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Zheqi Peng, Xin Wang, Zhishen Wu
Summary: In this study, the statistical modeling of fiber-reinforced polymer (FRP) cables using the classic fiber bundle model is explored. The study considers important features of large-scale multi-tendon FRP cables, such as initial random slack and uneven tensile deformation among tendons. A parametric study and reliability analysis are conducted to predict the load-displacement relation and design thousand-meter-scale FRP cables. The study emphasizes the relation between the reliability index beta of the cable and the safety factor gamma of the FRP material.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Yanchao Shi, Shaozeng Liu, Ye Hu, Zhong-Xian Li, Yang Ding
Summary: This paper introduces a damage assessment method for reinforced concrete (RC) columns under blast loading, using modal parameter measurement as the evaluation index. The validity of the proposed method is validated through numerical and experimental analysis. The results show that this modal-based damage assessment method is applicable for non-destructive evaluation of blast-induced damage of RC columns.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Xiaolin Zou, Maosheng Gong, Zhanxuan Zuo, Qifang Liu
Summary: This paper proposes an efficient framework for assessing the collapse capacity of structures in earthquake engineering. The framework is based on an accurate equivalent single-degree-of-freedom (ESDOF) system, calibrated by a meta-heuristic optimization method. The proposed framework has been validated through case studies, confirming its accuracy and efficiency.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Jie Hu, Weiping Wen, Chenyu Zhang, Changhai Zhai, Shunshun Pei, Zhenghui Wang
Summary: A deep learning-based rapid peak seismic response prediction model is proposed for the most common two-story and three-span subway stations. The model predicts the peak seismic responses of subway stations using a data-driven approach and limited information, achieving good predictive performance and generalization ability, and demonstrating significantly higher computational efficiency compared to numerical simulation methods.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Jin Ho Lee, Jeong-Rae Cho
Summary: A simplified model is proposed to estimate the earthquake responses of a rectangular liquid storage tank considering the fluid-structure interactions. The complex three-dimensional structural behavior of the tank is represented by a combination of fundamental modes of a rectangular-ring-shaped frame structure and a cantilever beam. The system's governing equation is derived, and earthquake responses such as deflection, hydrodynamic pressure, base shear, and overturning moment are obtained from the solution.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
W. J. Lewis, J. M. Russell, T. Q. Li
Summary: The work discusses the key features and advantages of optimal 2-pin arches shaped by statistically prevalent load and constant axial stress. It extends the design space of symmetric arches to cover asymmetric forms and provides minimum values of constant stress for form-finding of such arches made of different materials. The analysis shows that constant stress arches exhibit minimal stress response and have potential implications for sustainability and durability of future infrastructure.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Wen-ming Zhang, Han-xu Zou, Jia-qi Chang, Tian-cheng Liu
Summary: Saddle position is crucial in the construction and control of suspension bridges. This study proposes an analytical approach to estimate the saddle positions in the completed bridge state and discusses the calculation under different definitions. The relationship between the saddle position and the tower's centerline is analyzed, along with the eccentric compression of the tower. The feasibility of the proposed method is verified through a real-life suspension bridge.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Shaise K. John, Alessio Cascardi, Yashida Nadir
Summary: This study experimentally investigated the use of TRM material for reinforcing concrete columns. The results showed that increasing the number of textile layers effectively increased the axial strength. Additionally, the choice of fiber type and hybrid textile configuration also had a significant impact on strength improvement. A new design model that considers the effects of both the confining matrix and textile was proposed.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Chandrashekhar Lakavath, S. Suriya Prakash
Summary: This study experimentally investigated the shear behavior of post-tensioned UHPFRC girders, considering factors such as prestress level, fiber volume fraction, and types of steel fibers. The results showed that increasing prestress and fiber dosage could enhance the ultimate load-carrying capacity of the girders, reduce crack angle, and increase shear cracking load.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Vahid Goodarzimehr, Siamak Talatahari, Saeed Shojaee, Amir H. Gandomi
Summary: In this paper, an Improved Marine Predators Algorithm (IMPA) is proposed for size and shape optimization of truss structures subject to natural frequency constraints. The results indicate that IMPA performs better in solving these nonlinear structural optimization problems compared to other state-of-the-art algorithms.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Chun-Xu Qu, Jin-Zhao Jiang, Ting-Hua Yi, Hong-Nan Li
Summary: In this paper, a computer vision-based method is proposed to monitor the deformation and displacement of building structures by obtaining 3D coordinates of surface feature points. The method can acquire a large number of 3D coordinates in a noncontact form, improve the flexibility and density of measurement point layout, and is simple and cost-effective to operate.
ENGINEERING STRUCTURES
(2024)
