Article
Engineering, Civil
Li Xu, Jinlong Pan, Li Guo
Summary: This study investigates the mechanical performance and properties of precast reinforced concrete (RC) columns with grouted sleeves (GS) connections using finite-element analysis. The plastic hinge lengths and rotations due to bond slip in precast RC columns were found to be significantly different from those in cast-in-place RC columns. The plastic hinge lengths and rotations were affected by several parameters.
ENGINEERING STRUCTURES
(2022)
Article
Engineering, Civil
Changjiang Shao, Wang Wei, Suiwen Wu, Qiming Qi, Chunyang Wang
Summary: Accurately estimating the equivalent plastic hinge length of a reinforced concrete (RC) column is essential in ductile design. The plastic behavior of a RC hollow column is significantly influenced by tension shift and bond-slip, which has been overlooked in existing models. This study derives an innovative formula for the equivalent plastic hinge length of hollow columns, considering the effects of tension shift and bond-slip. Quasi-static tests and comparison with existing models demonstrate the accuracy and applicability of the proposed formula for both uniform and variable section hollow columns.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Ali Kheyroddin, Sina Rouhi, Hamed Dabiri
Summary: The study evaluated the application of lap and forging splice methods in RC columns. Results showed that using forging splices in the middle or at the bottom of columns can increase displacement ductility, curvature ductility, and plastic hinge length, while lap splices may decrease seismic parameters. Additionally, incorporating forging splices at the bottom of columns may increase stiffness and ultimate moment.
ENGINEERING STRUCTURES
(2021)
Article
Engineering, Civil
Seyed Mohammad Hosseini, Davood Mostofinejad
Summary: This study investigates the shear-flexural retrofitting of RC short columns using FRP materials, showing that this retrofitting method significantly improves the load-carrying capacity, ductility, and dissipated energy of the columns. However, using the EBR method for installing longitudinal FRP sheets did not have a positive effect on the overall behavior of the retrofitted short columns.
JOURNAL OF COMPOSITES FOR CONSTRUCTION
(2021)
Article
Engineering, Civil
Chang Seok Lee, Eunsoo Choi, Jong-Su Jeon
Summary: This study derives an analytical expression for the plastic hinge length of rectangular concrete columns reinforced with nickel-titanium shape memory alloy (SMA) bars and explores the effect of various parameters. The proposed plastic hinge expression reduces SMA usage by half while maintaining similar nonlinear response.
ENGINEERING STRUCTURES
(2022)
Article
Engineering, Civil
Liu Jin, Jian Liang, Fengjuan Chen, Dong Li, Xiuli Du
Summary: This paper addresses the problem of plastic hinge length in square concrete filled steel tubular (CFST) columns. Experimental and analytical methods are used to establish the relationship between plastic hinge length and cross-section width, axial load ratio, compressive strength, and other parameters.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Civil
Abdoulaye Sanni Bakouregui, Hamdy M. Mohamed, Ammar Yahia, Brahim Benmokrane
Summary: This study introduces a new method for predicting the load-carrying capacity of FRP-RC columns using the XGBoost algorithm, outperforming other numerical equations. Important input variables for predicting the maximum axial load-carrying capacity include eccentricity ratio, gross sectional area, compressive strength of concrete, etc.
ENGINEERING STRUCTURES
(2021)
Article
Construction & Building Technology
Tae-Hoon Kim, Ki-Young Eum, Hyun Mock Shin
Summary: This paper presents a novel plastic hinge element considering shear deformation for evaluating the seismic performance of RC bridge columns with lap splices. A reliable 3D constitutive model is difficult to develop, hence a new plastic hinge element based on the Timoshenko beam theory is proposed. The finite element model was implemented in a computer program named RCAHEST. The validation of the plastic hinge element was conducted through numerical and experimental comparisons.
INTERNATIONAL JOURNAL OF CONCRETE STRUCTURES AND MATERIALS
(2023)
Article
Instruments & Instrumentation
Eunsoo Choi, Jong-Su Jeon, Jong-Han Lee
Summary: This study investigates the self-centering capacity of RC columns with martensitic SMA bars in the plastic hinge region through experiments. The results show that the RC column with SMA bars exhibits a plastic hinge around the couplers, demonstrating excellent self-centering capacity, but lower energy-dissipation capacity compared to conventional RC columns.
SMART MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Civil
Shengqi Guo, Mengfu Wang
Summary: This research conducts finite element analysis and theoretical derivation to study the calculation method of the equivalent plastic hinge length of superimposed reinforced concrete shear walls. Based on the analysis of crack development and failure modes, the relationship between ultimate deformation and equivalent plastic hinge length is established. By analyzing 51 finite element models, the influence modes of different parameters on the equivalent plastic hinge length are summarized. Finally, the proposed calculation formulae for the equivalent plastic hinge length of superimposed reinforced concrete shear walls are validated through numerical and experimental results.
Article
Engineering, Civil
Phu-Anh-Huy Pham, Chung-Chan Hung
Summary: This paper introduces a comprehensive method for determining the plastic hinge length (PHL) using certain criteria and proposes a revised equation to estimate the equivalent PHL of rectangular RC columns based on tested results.
STRUCTURE AND INFRASTRUCTURE ENGINEERING
(2023)
Article
Engineering, Geological
Ahmed M. El-Kholy, Sayed M. Sayed, Mohamed M. El-Assaly
Summary: This paper presents a nonlinear macromodeling strategy for predicting the structural behavior of multistory reinforced concrete buildings with masonry infill walls during earthquakes. The strategy uses different models for the frame elements and joints, masonry infill walls, and shear walls, and has been validated to be accurate and reliable.
BULLETIN OF EARTHQUAKE ENGINEERING
(2023)
Article
Construction & Building Technology
Ekkachai Yooprasertchai, Pongsak Wiwatrojanagul, Amorn Pimanmas
Summary: This study investigated the potential of sisal and jute fiber composite sheets in strengthening low-rise residential buildings in seismic-prone areas. The results showed that these natural fiber composites could enhance the structural performance of the buildings and reduce costs.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Engineering, Civil
Yuan Qing, Chun-Lin Wang, Shaoping Meng, Bin Zeng
Summary: A new precast concrete column system with CTB couplers was proposed to ensure continuity of longitudinal rebar, and experimental results showed that CTB columns exhibited better performance than monolithic concrete columns, with an ultimate drift ratio greater than 1/50, a ductility factor greater than 3.48, and a higher bearing capacity. The reliability of the CTB coupler was validated and a simplified model was proposed to accurately calculate the ultimate drift ratio of the CTB column, which matched well with measured values.
ENGINEERING STRUCTURES
(2022)
Article
Engineering, Civil
Eleonora Bruschi, Paolo M. Calvi, Virginio Quaglini
Summary: This study examines the impact of modeling decisions in concentrated plasticity formulations on the behavior of reinforced concrete frames in time history analyses. By investigating the sensitivity of estimated structural response on certain assumptions, it compares the results between different formulations and highlights the differences in predictions, particularly regarding inter-story drift ratio and maximum base moment. Ultimately, it suggests that improving the agreement between concentrated and distributed plasticity formulations may be achieved through adopting an effective area moment of inertia dependent on axial load.
ENGINEERING STRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
De-Cheng Feng, Xiaodan Ren
Summary: This paper presents a comprehensive analysis of the mesh-dependency issue for plain concrete and reinforced concrete members under uniaxial loading. It proposes a unified regularization method to overcome the mesh-dependency issue for RC members with lower reinforcing ratios.
INTERNATIONAL JOURNAL OF DAMAGE MECHANICS
(2023)
Article
Construction & Building Technology
De-Cheng Feng, Xu-Yang Cao, Ding Wang, Gang Wu
Summary: A non-parametric seismic fragility assessment framework based on PDEM is proposed in this paper, which can effectively evaluate the structural response under earthquake excitation and achieve higher accuracy than the classic parametric LRM method with fewer dynamic calculations.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Engineering, Civil
Wenyang Zhang, Jorge G. F. Crempien, Asli Kurtulus, Peng-Yu Chen, Pedro Arduino, Ertugrul Taciroglu
Summary: Physics-based earthquake ground motion simulations have made significant progress in the past two decades due to the advancements in high-performance computing techniques and resources. This research focuses on the simulation of high-fidelity broadband ground motion in Istanbul, Turkey, using 57 different source models and incorporating high-resolution topography and seismic data. The results provide valuable data for seismic risk assessment and other applications, offering a massive database of displacement, velocity, and acceleration time histories for over 20,000 surface and bedrock stations.
EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS
(2023)
Article
Construction & Building Technology
De-Cheng Feng, Yue Li, Abdollah Shafieezadeh, Ertugrul Taciroglu
JOURNAL OF STRUCTURAL ENGINEERING
(2023)
Article
Construction & Building Technology
De-Cheng Feng, Xin Chen, Frank McKenna, Ertugrul Taciroglu
Summary: Both integral and implicit gradient formulations are developed for a force-based beam element with material and geometric nonlinearities. The proposed element accurately captures both material and geometric nonlinearities, and offers consistent response predictions for any number of integration points due to its nonlocal regularization.
JOURNAL OF STRUCTURAL ENGINEERING
(2023)
Editorial Material
Chemistry, Multidisciplinary
Camillo Nuti, Bruno Briseghella, Davide Lavorato, Ertugrul Taciroglu, Alessandro Vittorio Bergami
APPLIED SCIENCES-BASEL
(2023)
Article
Construction & Building Technology
Niloofar Malekghaini, Farid Ghahari, Hamed Ebrahimian, Matthew Bowers, Eric Ahlberg, Ertugrul Taciroglu
Summary: This study proposes a two-step FE model updating approach for health monitoring and damage identification of prestressed concrete girder bridges. The approach includes modal-based model updating and time-domain model updating to estimate the linear model parameters and refine parameters accounting for the nonlinear response behavior of the bridge, respectively. Forced-vibration experiments on decommissioned and deteriorated prestressed bridge I-girders are designed and carried out to validate the applicability of the approach.
Article
Engineering, Mechanical
Futao Ni, Jian Zhang, Ertugrul Taciroglu
Summary: This study proposes a framework that considers vehicle velocity, mass, and location as supervised learning problems using structural vibration response to accurately identify vehicle position, velocity, and mass on bridges. The framework consists of three phases: data generation and preparation, network building and training, and prediction. The proposed method is demonstrated to be effective through quantifying and analyzing the identification accuracy using different indexes under various scenarios.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Engineering, Mechanical
Mohammad Hesam Soleimani-Babakamali, Roksana Soleimani-Babakamali, Kourosh Nasrollahzadeh, Onur Avci, Serkan Kiranyaz, Ertugrul Taciroglu
Summary: By utilizing transfer learning and generative adversarial network architecture, the proposed method successfully transfers knowledge on the differences between no-damage and damage cases, leading to accurate and generalizable data-driven structural health monitoring applications.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Construction & Building Technology
Niloofar Malekghaini, Farid Ghahari, Hamed Ebrahimian, Matthew Bowers, Hoda Azari, Ertugrul Taciroglu
Summary: This study presents a time-domain Bayesian finite element model updating approach to jointly identify the vehicular loads and finite element modeling parameters of bridges using vibration data and the location of vehicles as input. The approach is verified through case studies based on numerically simulated data from a bridge model. Different damage scenarios are examined and the model parameters are used to infer the location and extent of damage within the bridge. The results show the successful performance of the proposed approach in a numerically simulated environment.
STRUCTURAL CONTROL & HEALTH MONITORING
(2023)
Article
Engineering, Civil
Tracy Kijewski-Correa, Barbaros Cetiner, Kuanshi Zhong, Chaofeng Wang, Adam Zsarnoczay, Yunhui Guo, Meredith Lochhead, Frank McKenna
Summary: This paper introduces an augmented parcel approach that combines various sources of open data, machine learning modules, and time-evolving rulesets to support risk assessments on different types of buildings under hurricane wind and flood hazards. The study validates the importance of computer vision modules and accurate year built data in generating building inventories and emphasizes the challenges of simplifying complex contemporary roof geometries. The use of an augmented parcel inventory in loss assessments yields consistent damage states with ground-truth observations for minor to moderate damage.
NATURAL HAZARDS REVIEW
(2023)
Article
Chemistry, Multidisciplinary
Yufeng Dong, Wenyang Zhang, Anoosh Shamsabadi, Li Shi, Ertugrul Taciroglu
Summary: This paper presents a toolbox implemented in ABAQUS, which incorporates the vehicle-bridge interaction (VBI) element theory through a user-defined element (UEL) subroutine. The toolbox effectively handles diverse vehicle-bridge interaction systems and has been validated through moving sprung mass and moving rigid bar models. Furthermore, a case study on a three-dimensional finite-element model of a high-speed railway bridge in China showcases the practical application of the developed scheme in analyzing vehicle-bridge structures with high complexity.
APPLIED SCIENCES-BASEL
(2023)
Article
Construction & Building Technology
Hamed Ebrahimian, Abdelrahman Taha, Farid Ghahari, Domniki Asimaki, Ertugrul Taciroglu
Summary: This study presents a finite element model updating technique for soil-structure system identification of the Millikan Library building using seismic data recorded during the 2002 Yorba Linda earthquake. The technique uses a sequential Bayesian estimation approach for joint parameter and input identification. A two-step system identification approach is devised to update the fixed-base structural model and the soil-structure model. The study demonstrates the integration of large-scale FE models with measurement data for model inversion and its potential applications in system identification and health monitoring of civil structures.
Article
Engineering, Mechanical
Shi-Zhi Chen, Shu-Ying Zhang, De-Cheng Feng, Ertugrul Taciroglu
Summary: Machine learning-based data-driven approaches are increasingly important for predicting structural performance. These approaches can learn hidden patterns in experimental databases and sometimes outperform mechanics-based predictive models. However, there is often a gap between the collected data and the desired prediction domain. To address this issue, a new data-driven approach called PkeDA, which integrates prior knowledge embedded in empirical formulas, is proposed. It has been shown to have excellent interpolation and extrapolation capabilities in predicting the bending capacities of reinforced concrete beams.
JOURNAL OF ENGINEERING MECHANICS
(2023)
Article
Engineering, Civil
Shi-Zhi Chen, Qiang-Ming Zhong, Shu-Ying Zhang, Gan Yang, De-Cheng Feng
Summary: Recently, bridge weigh-in-motion (B-WIM) technology has been essential in bridge management and maintenance. A study was conducted to investigate the performance of B-WIM methods considering the spatial variation of material characteristics, including random field representation and various parametric analyses. Numerical simulations showed that the spatial variability of material properties has a limited impact on the performance of typical B-WIM methods, with a maximum discrepancy of recognition accuracy of less than 5%.
ASCE-ASME JOURNAL OF RISK AND UNCERTAINTY IN ENGINEERING SYSTEMS PART A-CIVIL ENGINEERING
(2023)