Article
Materials Science, Multidisciplinary
Zele Li, Mohammad Noori, Ying Zhao, Chunfeng Wan, Decheng Feng, Wael A. Altabey
Summary: A multi-objective optimization algorithm NSGA-II is employed in this paper to identify the parameters of the Bouc-Wen-Baber-Noori hysteresis model in order to describe the restoring force characteristics of reinforced concrete columns under different failure modes. Sensitivity analysis and parameter distribution patterns are used to propose reference parameter values for different failure modes.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART L-JOURNAL OF MATERIALS-DESIGN AND APPLICATIONS
(2021)
Article
Engineering, Civil
Chao-Lie Ning, Yin Cheng, Xiao-Hui Yu
Summary: A simplified approach is proposed to investigate the seismic ductility demand of shear-critical RC columns based on experimental calibration. The method includes establishing a governing equation, implementing a strength reduction approach, and regressing an empirical expression to predict seismic ductility demand. This study verifies the feasibility of the proposed approach and highlights the limitations of lognormal assumption in describing probabilistic characteristics of seismic ductility demand.
JOURNAL OF EARTHQUAKE ENGINEERING
(2021)
Article
Engineering, Multidisciplinary
Weili Luo, Tongyi Zheng, Huawei Tong, Chao Zhang, Zhongrong Lu
Summary: A modified EBL algorithm is proposed to solve the nonlinear hysteretic parameter identification problem and is demonstrated to outperform other algorithms in both numerical and laboratory studies.
ENGINEERING OPTIMIZATION
(2021)
Article
Engineering, Civil
Felice Colangelo
Summary: The Bouc-Wen model and subsequent improvements have been widely used to simulate the hysteretic behavior of mechanical elements subjected to load reversals. In this study, an enhanced version of the model is proposed, which features convenient parameters, asymmetry, and versatile pinching. The proposed model is validated by simulation of experimental test results and proves to be effective for engineering performance assessment of building and bridge elements.
STRUCTURE AND INFRASTRUCTURE ENGINEERING
(2022)
Article
Construction & Building Technology
M. Nithyadharan, V Kalyanaraman
Summary: This study introduces a new screw connection model and constitutive model to represent the behavior of screw connections in the non-linear finite element analysis of cold formed steel shear wall panels. The proposed models are validated by comparing experimental results with finite element analysis results.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2021)
Article
Mechanics
Mehdi Maleki, Hamid Ahmadian, Majid Rajabi
Summary: Recent research has focused on modeling and characterizing the dominant mechanisms in contact interface restoring forces. Nonlinear phenomena, such as micro-vibro-impacts and micro/macro-slip damping, occur as vibrational amplitudes increase in frictional contact areas. This study examines the nonlinear behavior of frictional contact interfaces under variable contact preloads caused by micro-vibro-impacts. The modified Bouc-Wen model accurately describes the friction forces at the contact interfaces.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2023)
Article
Engineering, Mechanical
Brian Painter, Giovanni Ferrari, Marco Amabili
Summary: In pressurized water reactors, accurate modeling of fuel rod dynamics is crucial to prevent excessive wear caused by turbulent fluid forces. The use of spacer grids with specific design to restrain the fuel rod and generate nonlinear boundary conditions can lead to complex dynamic responses. Experimental studies on nonlinear vibration of fuel rods supported by spacer grids have demonstrated good agreement between model predictions and actual results.
NONLINEAR DYNAMICS
(2022)
Article
Engineering, Mechanical
Giovanni Formica, Nicolo Vaiana, Luciano Rosati, Walter Lacarbonara
Summary: The dynamic response and bifurcations of high-dimensional systems with hysteretic restoring forces in all degrees of freedom are investigated using two hysteresis models. A numerical technique based on an enhanced pathfollowing approach using the Poincare map is employed. A five-dof system with Bouc-Wen or exponential hysteresis models enriched by nonlinear elastic terms is studied, revealing a rich variety of nonlinear responses and bifurcations.
NONLINEAR DYNAMICS
(2021)
Article
Automation & Control Systems
A. A. A. Vogels, R. H. B. Fey, M. F. Heertjes
Summary: This paper presents a physics-based and experimental modeling procedure for dynamic links in high-precision stage systems, combining the generalized Maxwell model and a modification of the Iwan model. A normalized dissipation factor is introduced to recognize frequency and/or amplitude dependent behavior using measured data. An identification procedure is proposed to estimate values of the model parameters using the measured data, and the Maxwell-Iwan modeling approach is demonstrated by experimental results from an industrial wafer stage system.
Article
Engineering, Mechanical
Brian Painter, Marco Amabili
Summary: In this study, the non-planar vibration response of a beam with initial geometric imperfections is investigated using a geometrically nonlinear beam model. The experimental data shows good agreement with the beam model response around the resonant frequency of the first bending mode.
NONLINEAR DYNAMICS
(2023)
Article
Engineering, Mechanical
Mohammad Sheikh Sofla, Mohammad Jafar Sadigh, Mohammad Zareinejad
Summary: This paper focuses on the design and dynamic modeling of a novel multi-section continuum and compliant robotic manipulator with large workspace. Fluidic muscles are utilized in the design of the continuum manipulator, with modifications made to the Bouc-Wen hysteretic function to accurately describe the asymmetric force/length hysteresis of the actuators. Experimental results show that the proposed model has a proper performance to characterize the asymmetric hysteresis loop of the actuators.
MECHANISM AND MACHINE THEORY
(2021)
Article
Mechanics
R. Manikantan, T. Ghosh Mondal, S. Suriya Prakash, C. P. Vyasarayani
Summary: This article introduces the use of the homotopy technique to identify unknown parameters in the hysteresis model of structural members. Through a comparison with global optimization methods, the superiority of the homotopy method in terms of computational effort and convergence efficiency is confirmed.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2022)
Article
Engineering, Civil
Taeyong Kim, Oh-Sung Kwon, Junho Song
Summary: This paper introduces a deep neural network (DNN) model developed for hysteretic systems with degradation and pinching effects. The proposed model, based on a modified Bouc-Wen-Baber-Noori (m-BWBN) model, is used to construct a seismic demand database. A new DNN architecture and training methodology are proposed to learn the effects of complex hysteretic characteristics on peak seismic responses.
EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS
(2022)
Article
Construction & Building Technology
Tae-Sung Eom, Seung-Jae Lee, Chul-Goo Kim, Hong-Gun Park
Summary: This study investigates nonlinear modeling parameters for reinforced concrete columns under cyclic loading, with a focus on failure mode and hysteretic energy dissipation. A failure mode-based modeling method is developed to define force-deformation relations. Effective stiffness, yield deformation, ultimate deformation, and energy dissipation ratio are proposed as functions of various parameters. The modeling results are compared with existing test results for verification.
ACI STRUCTURAL JOURNAL
(2022)
Article
Construction & Building Technology
Nageh M. Ali, A. I. B. Farouk, S. I. Haruna, Hani Alanazi, Musa Adamu, Yasser E. Ibrahim
Summary: This study presented a feature selection-based approach for determining the optimal input parameters for classifying reinforced concrete columns failure modes. The Pearson correlation and mutual information techniques were used to test the relevance of input variables to the outputs, and the minimum redundancy maximum relevance algorithm was employed to select the important input variables. The aspect ratio, longitudinal rebar index, transverse rebar index, and axial load ratio were identified as the optimal input parameters.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Engineering, Civil
Chao-Lie Ning, Yin Cheng, Xiao-Hui Yu
Summary: A simplified approach is proposed to investigate the seismic ductility demand of shear-critical RC columns based on experimental calibration. The method includes establishing a governing equation, implementing a strength reduction approach, and regressing an empirical expression to predict seismic ductility demand. This study verifies the feasibility of the proposed approach and highlights the limitations of lognormal assumption in describing probabilistic characteristics of seismic ductility demand.
JOURNAL OF EARTHQUAKE ENGINEERING
(2021)
Article
Engineering, Civil
Wenqi Du, Sen Long, Chao-Lie Ning
Summary: This paper presents an algorithm for selecting ground motions from a database for multiple sites under earthquake scenarios. The algorithm constructs the target distribution of spectral accelerations at multiple sites by considering the spatial correlation of ground motions. It then randomly simulates response spectra and selects recorded ground motions that match the simulated spectra. Validation examples demonstrate that the selected ground motions realistically capture the target distribution of response spectra. The computational expense of the algorithm is found to be generally acceptable. The algorithm can be used for selecting ground motions as inputs for dynamic analysis of spatially distributed buildings.
JOURNAL OF EARTHQUAKE ENGINEERING
(2022)
Article
Engineering, Civil
Chao-Lie Ning, QunFang Hu, Fei Wang
JOURNAL OF PIPELINE SYSTEMS ENGINEERING AND PRACTICE
(2020)
Article
Engineering, Geological
Wenqi Du, Xiaohui Yu, Chao-Lie Ning
BULLETIN OF EARTHQUAKE ENGINEERING
(2020)
Article
Construction & Building Technology
Jiaxing Ma, Chao-Lie Ning, Bing Li
JOURNAL OF STRUCTURAL ENGINEERING
(2020)
Article
Geochemistry & Geophysics
Yin Cheng, Chao-Lie Ning, Wenqi Du
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
(2020)
Article
Engineering, Civil
Wenqi Du, Chao-Lie Ning
Summary: In this article, a new spatial cross-correlation model for ground motion intensity measures is proposed using PCA and geostatistical analysis. The model successfully captures the spatial variability characteristics of multiple IMs, enabling rapid simulation of spatially cross-correlated IMs over a large area.
EARTHQUAKE SPECTRA
(2021)
Article
Construction & Building Technology
Iman Mansouri, Suleyman Ipek, Esra Mete Guneyisi, Chao-Lie Ning
Summary: The peak strength of reinforced concrete columns is crucial for seismic performance appraisal, and a gene expression programming method has been implemented to develop a peak strength prediction model, which has been validated to produce rational predictions for various failure modes.
ADVANCES IN STRUCTURAL ENGINEERING
(2021)
Article
Engineering, Civil
Xiaohui Yu, Zihan He, Chao-Lie Ning
Summary: The paper proposes an advanced dimension-adaptive sparse grid (ADASG) integration method by introducing a numerical indicator quantifying the importance levels of difference quadrature formulas to improve the accuracy and efficiency of numerical integration of performance functions.
ASCE-ASME JOURNAL OF RISK AND UNCERTAINTY IN ENGINEERING SYSTEMS PART A-CIVIL ENGINEERING
(2021)
Article
Geochemistry & Geophysics
Yin Cheng, Tongtong Liu, Jianfeng Wang, Chao-Lie Ning
Summary: In earthquake engineering, it is recognized that a vector of intensity measures (IMs) can provide better predictions for seismic structural responses. This study examines the correlations between spectral input energy (E-I) and other important IMs, finding strong positive correlations with peak amplitude-based IMs and negative correlations with duration-based IMs.
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
(2022)
Article
Engineering, Geological
Chao-Lie Ning, Shuo Wang, Yin Cheng
Summary: This study introduces a 1M2DOF system to model building structures under biaxial earthquake excitation, derives a solution to estimate the seismic ductility demands of building structures, and investigates the effects of earthquake incidence angles, structural hysteresis characteristics, strength reduction factors, and building vibration periods.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2022)
Article
Construction & Building Technology
Chao-Lie Ning, Meng Wang, Xiaohui Yu
Summary: A probabilistic model using Bayesian neural network was developed to predict the peak strength of reinforced concrete columns. The developed model is failure-mode-independent and produces reasonable predictions for columns failing in different modes. It exhibits better performance in reducing uncertainties compared to existing models, and can predict the peak strength in terms of the confidence interval.
ADVANCES IN STRUCTURAL ENGINEERING
(2022)
Article
Engineering, Civil
Bo Yu, Zecheng Yu, Bing Li, Qiming Li, Chaolie Ning
Summary: This study proposes a probabilistic classification criterion for classifying likely failure modes of reinforced concrete (RC) columns under seismic loading conditions. By analyzing the accuracy and applicability of available flexure and shear strength models, the ratio of shear demand to shear strength (m) is calculated. The probabilistic distribution characteristics of m, shear aspect ratio (lambda), and transverse reinforcement ratio (rho(sv)) are examined to determine the probability of failure in different modes. A probabilistic classification criterion is suggested, considering the coupling effects of m, lambda, and rho(sv). The proposed criterion shows a 20% higher classification accuracy than existing criteria for RC columns failing in flexure, flexure-shear, and shear critical modes. The failure modes of RC columns change progressively from ductile flexure failure to flexure-shear, and then shear critical failure mode with the increase of m, and the decrease of lambda and rho(sv).
JOURNAL OF EARTHQUAKE ENGINEERING
(2023)
Article
Engineering, Civil
Chao-Lie Ning, Li-Ping Wang, Yin Cheng, Xiao-Hui Yu
Summary: A simplified framework is proposed in this study to assess the seismic fragility curves of RC columns under different failure patterns in a unified manner. By simulating RC columns and compiling an experimental database, the seismic fragility curves of RC columns under different failure patterns are generated, and empirical equations are proposed to predict the seismic fragility parameters.
JOURNAL OF EARTHQUAKE ENGINEERING
(2022)
Article
Construction & Building Technology
Qi Jiang, Wei Liu, Shaopeng Wu, Xuanwen Gou
Summary: This study analyzes the erosion mechanisms of NaCl solution on asphalt concrete and finds that NaCl solution softens asphalt and promotes the intrusion of crystalline salt into it. Salt crystallization alters the surface roughness of aggregates, resulting in a decrease in skid resistance but an improvement in compressive strength. Additionally, the concentration of NaCl solution initially has no significant impact on the mechanical performance of asphalt concrete, but its domination gradually increases with the intensification of cyclic effects.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Lili Kan, Lan-qing Dai, Ning Kong, Bin Peng, Fei Wang
Summary: This paper investigates the effect of freezing and thawing cycles on the tensile behavior of cracked ultra-high performance concrete (UHPC). The results show that long-term freezing and thawing action deteriorates the cracking strength, tensile strength, tensile strain, and strain energy of cracked UHPC. On the other hand, the action of water generally favors the development of tensile properties of UHPC. The crack distribution tends to be unsaturated under freezing and thawing environment, and the re-hydration reaction is hindered. The pore structure near the crack varies under different environments.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Xin Xiao, Jingwei Li, Qingke Meng, Xiangshan Hou, Yanhui Liu, Xujiang Wang, Wenlong Wang, Shengtao Lu, Yuzhong Li, Yanpeng Mao, Tong Li
Summary: Preparing gypsum-based self-leveling mortar (GSLM) using beta-hemihydrate gypsum and solid wastes-derived sulfoaluminate cement (WSAC) can improve the mechanical performance of the mortar, but phosphorus impurities can weaken the hydration speed and degree.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Sihang Bao, Junzhen Di, Yanrong Dong, Ziqing Gao, Qing Gu, Yuanfang Zhao, Hongyu Zhai
Summary: Tailings dam break and leakage accidents pose a threat to the safety of people in mining areas and cause severe environmental pollution. This study focuses on solidifying tailing sand using microbial induced calcite precipitation (MICP) to improve strength and fix heavy metals. The curing time of MICP bio-cemented tailings is found to significantly impact the strength of tailings, while its effect on heavy metal fixation is minimal. The optimized MICP curing time is 10 days, resulting in improved strength and cementation of tailings particles.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Ferhat Benmahiddine, Fares Bennai, Achraf Charaka, Ameur El Amine Hamami, Abdelkader Tahakourt, Rafik Belarbi
Summary: This paper studied the effects of hysteresis on the hygrothermal behavior at the building scale. Through laboratory validation and numerical simulations, it was found that hysteresis has a significant impact on the relative humidity and total heat fluxes in buildings, while it does not have a noticeable effect on temperature variations.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
You Gao, Wei He, Xiayang Zhang, De'an Sun, Pei Li
Summary: This study determined the boundary line between the swelling and compression deformation zone in lateritic clay through wetting tests, and proposed a simple bimodal SWRC model. It also found that the existing strength model underestimated the tested values in the medium to high suction range, therefore a segmented strength equation was introduced for enhanced predictions of the strength properties of lateritic clay.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Prabhath Ranjan Kumar Soda, Asheer Mogal, Kalyan Chakravarthy, Nikhil Thota, Nimish Bandaru, Sanjay Kumar Shukla, K. M. Mini
Summary: This study investigates the use of encapsulated bacteria to improve the self-healing ability of concrete. Through various tests, it is found that using 20% cement-coated alginate beads (CCAB) and 5% nanosilica (NS) can achieve optimal strength and healing. This research is significant for enhancing the durability of concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Shizhe Wang, Haiping Wu, Wen Yang, Wei Wang, Zhibo Zhu, Kun Nie, Luoxin Wang, Hua Wang, Jing Wu
Summary: In this study, photothermal-heat storage concrete (PHSC) was developed with excellent photothermal conversion performance and heat storage capacity. By absorbing and storing solar energy during the day and releasing it at night, PHSC can effectively reduce energy consumption in buildings.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Robin Deb, Jialuo He, Geetika Mishra, Yaghoob (Amir) Farnam
Summary: Incorporation techniques of phase change materials in cementitious composites have a significant influence on thermal properties. This study investigated the thermal behavior of low-temperature PCM when subjected to varying temperature change rates and pore confinement inside the porous network of lightweight aggregates. The results showed that ramp rates affect the nucleation and crystallization growth process during the phase transition, and the pore structure of the aggregates affects the supercooling phenomenon and confinement pressure of the PCM.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Eduardo Ferreira, Payam Sotoudeh, Dagmar Svecova
Summary: This study investigates the fatigue behavior of concrete under different stress reversal conditions. The results indicate that stress reversal generally causes more severe damage and reduces the cycles to failure compared to tensile fatigue. Additionally, adding some level of compression contributes to the energy required for failure under stress reversal fatigue. Specimens with higher concentration of fractured aggregates achieve longer fatigue lives.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Mag Raj Gehlot, Sandeep Shrivastava
Summary: This study evaluates the compatibility relationship between plaster bonds and the substrate under an accelerated aging environment, and finds that incorporating an appropriate amount of granite cutting waste can improve the strength parameters and adhesion of the cement mortar.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Min Zhang, Qirui Luo, Mingke Deng, Shixing Zhao
Summary: This study investigated the bond behavior between carbon FRCM composites with added short fibers and concrete substrates. The effects of different factors were considered and 36 specimens were tested and discussed. The experimental results were analyzed in terms of failure mode, load-slip curve, and characteristic parameters, and the contribution of weft yarns was taken into account in the developed bondslip model.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Dengkai Liu, Hongniao Chen, Ray Kai Leung Su
Summary: The susceptibility of building stones to fire and high temperature was investigated in this study by examining their physical and mechanical properties. The results show that both compressive and tensile properties of stones are affected by temperature changes. The tensile strength is particularly sensitive to temperature changes, requiring special attention to the components subjected to tensile stress in stone buildings. Principal component analysis was used to predict the mechanical properties of stones, providing a new method for calculating the residual mechanical properties after high temperature or fire.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Joso Maria Raposo, Eduardo Cavaco, Luis Costa Neves, Eduardo Julio
Summary: This paper investigates the correlation between the friction coefficient and the surface roughness of concrete-to-concrete interfaces. Experimental tests were performed on specimens with different surface treatments, and the surface roughness parameters were analyzed and correlated with the shear strength and friction coefficient. The results showed that certain roughness parameters had a strong positive correlation with the friction coefficient, while others had little or no correlation. A novel combined roughness parameter with optimized correlation was proposed.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Chiara Riccardi, Massimo Losa
Summary: The interest in using bio materials in asphalt pavements is growing due to economic reasons and environmental benefits. This study aimed to review the use of bio extenders as additives in binders, with a focus on replacements greater than 20% of fossil binder. The properties of bio-extended binders were found to vary substantially depending on the biomass source and production process.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
