Article
Engineering, Civil
Iqra Latif, Arnab Banerjee, Mitesh Surana
Summary: Machine learning has become a powerful tool in structural and earthquake engineering for accurately predicting structural design parameters. This study uses two machine learning algorithms, Neural Network and eXtreme Gradient Boosting, to predict the fundamental period of vibration of masonry infilled reinforced concrete frames. The input parameters considered are the number of storeys, opening ratio, span length, number of spans, and masonry wall stiffness. The trained machine learning models are compared with existing expressions in the literature and building codes, and are used to optimize the opening ratio and masonry wall stiffness of buildings using the genetic algorithm approach. This methodology results in a new database of buildings created by machine learning and optimization algorithms, and a dashboard for predicting and optimizing the fundamental period.
Article
Construction & Building Technology
Masoomeh Mirrashid, Hosein Naderpour
Summary: This article introduces two computational intelligence-based methods for determining the fundamental period of infilled reinforced concrete frames. By using statistical regression analysis, trained neural networks, and a neuro-fuzzy approach, the period can be accurately estimated. The results show that the opening ratio is the most influential parameter on the period of the frames considered.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Engineering, Civil
Surendra Nadh Somala, Karthika Karthikeyan, Sujith Mangalathu
Summary: This paper explores the use of machine learning algorithms for accurate estimation of fundamental time period in infrastructure systems, demonstrating superior performance compared to existing methods through advanced techniques such as bagging and boosting.
Article
Engineering, Civil
Daniel Salinas, Ioannis Koutromanos, Roberto T. Leon
Summary: This paper presents a new modeling approach for masonry-infilled, reinforced concrete frames based on the nonlinear truss analogy. The approach is validated through analysis of experimentally tested frames and its capability in capturing strength and damage patterns is evaluated.
ENGINEERING STRUCTURES
(2022)
Review
Construction & Building Technology
Joao Dias-Oliveira, Hugo Rodrigues, Panagiotis G. Asteris, Humberto Varum
Summary: This paper aims to review the modeling conditions and problems of infilled frames in global building analysis, and evaluate the development of structural codes, numerical models and experimental works to address these issues.
Article
Geosciences, Multidisciplinary
Mathavanayakam Sathurshan, Julian Thamboo, Chinthaka Mallikarachchi, Kushan Wijesundara, Priyan Dias
Summary: A new seismic rapid visual screening method is proposed in this study to evaluate the seismic risk of masonry infilled reinforced concrete (RC-MIW) school buildings in Sri Lanka. The method takes into account the irregularities of masonry infill walls (MIWs) and incorporates vulnerability attributes such as short column and soft storey effects. Numerical analysis was conducted to compare the effectiveness of the proposed method with existing methods. The results demonstrate that the proposed method accurately captures the seismic risks of typical RC-MIW school buildings.
INTERNATIONAL JOURNAL OF DISASTER RISK REDUCTION
(2023)
Article
Construction & Building Technology
Asad Ullah Qazi, Ali Murtaza Rasool, Yasser E. Ibrahim, Asif Hameed, Muhammad Faizan Ali
Summary: This research investigates the nonlinear behavior of scaled infilled masonry, confined masonry, and reinforced concrete structures. Two tests from the literature were utilized and validated as benchmarks. Numerical modeling and comparison with physical tests were conducted, and the results showed the feasibility of using numerical study for evaluating small-scale models.
Article
Chemistry, Multidisciplinary
Theodoros Rousakis, Vachan Vanian, Theodora Fanaradelli, Evgenia Anagnostou
Summary: This study focused on characteristic cases of recently tested real-scale RC framed wall infilled structures with innovative seismic protection through polyurethane joints or polyurethane-impregnated fiber grids, revealing suitable FE models and the unique features of interventions.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Civil
Fabio Mazza, Angelo Donnici
Summary: This study aims to investigate the influence of non-structural element damage caused by earthquakes on the nonlinear seismic behavior of reinforced concrete framed structures. A parametric study and GIS aided structural mapping were conducted to analyze the effects of various design parameters on the results. A macro-model was implemented to predict the in-plane and out-of-plane behavior of the non-structural elements. The seismic code provisions in Italy, Europe, and America were reviewed and evaluated through comparison with the analysis results.
ENGINEERING STRUCTURES
(2022)
Article
Engineering, Civil
Mohamed Noureldin, Tabish Ali, Jinkoo Kim
Summary: The objective of this study is to propose an expert system framework based on supervised machine learning to predict seismic performance considering soil-structure interaction. The framework examines different machine learning techniques and conducts sensitivity analysis on key parameters to obtain accurate predictions. It introduces a new global seismic assessment ratio that considers serviceability and strength aspects by utilizing various engineering demand parameters. The validation results show that the proposed framework provides more accurate results than conventional methods and exhibits high generalization potential for low- to mid-rise structures.
FRONTIERS OF STRUCTURAL AND CIVIL ENGINEERING
(2023)
Article
Geosciences, Multidisciplinary
Amar Louzai, Ahmed Abed
Summary: This study evaluates the influence of masonry infills on the seismic response of reinforced concrete (RC) frame structures through a comparative analysis between concentric and eccentric strut models. The results indicate that the concentric strut model provides a stiffer response at the global level, but fails to accurately reproduce the increasing forces in columns due to infills, which is particularly important for the local response of the structure.
Article
Engineering, Geological
G. Mucedero, D. Perrone, R. Monteiro
Summary: The seismic assessment of existing masonry infilled reinforced concrete (RC) building portfolios is a significant issue in Italy and Mediterranean countries due to the historical lack of modern seismic codes in the region. Past practices ignored the structural importance of masonry infills, but recent evidence has shown their substantial impact on the behavior of RC buildings. By analyzing the performance of masonry infilled RC buildings, accounting for variability in properties and modeling, this study provides insights for seismic risk assessment and quantification of economic losses.
BULLETIN OF EARTHQUAKE ENGINEERING
(2021)
Article
Engineering, Civil
Mebarek Khelfi, Fouad Kehila
Summary: This study proposes an improved numerical model to accurately estimate the lateral strength and stiffness of masonry-infilled frame structures and predict their probable failure modes. The correctness of the improved model is validated by comparing it with the original numerical model and experimental results. This enhanced macro element model serves as a powerful and accessible tool for assessing the capacity and stiffness of masonry-infilled frame structures and predicting their probable failure modes.
EARTHQUAKES AND STRUCTURES
(2023)
Article
Computer Science, Interdisciplinary Applications
K. Koocheki, S. Pietruszczak
Summary: This paper presents a methodology for analyzing large-scale masonry structures using artificial neural networks. By generating data through virtual experiments and finite element analysis, the paper identifies main variables and approximation coefficients for an inelastic constitutive law with embedded discontinuity. The approach is tested on a numerical example and compared with a detailed mesoscale model.
COMPUTERS & STRUCTURES
(2023)
Article
Engineering, Civil
Asma Yahiaoui, Saida Dorbani, Lilya Yahiaoui
Summary: The importance of hyperparameter optimization in machine learning models for predicting the fundamental period of infilled RC frame buildings is highlighted in this study. By fine-tuning the parameters using the Optuna framework, the best results were achieved, with higher coefficient of determination and lower error values. The feature selection technique demonstrated the contribution of five parameters and the multivariate adaptive regression splines outperformed building code formulas and proposed equations by other authors in predicting the fundamental period.
Article
Engineering, Civil
G. C. Tsiatas, M. Fragiadakis
JOURNAL OF EARTHQUAKE ENGINEERING
(2018)
Article
Mechanics
George C. Tsiatas, Nick G. Babouskos
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2017)
Article
Mathematics, Applied
George C. Tsiatas, Aristotelis E. Charalampakis
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
(2018)
Article
Engineering, Civil
Aristotelis E. Charalampakis, George C. Tsiatas, Panos Tsopelas
EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS
(2020)
Article
Acoustics
George C. Tsiatas, Dimitra A. Karatzia
JOURNAL OF VIBRATION AND CONTROL
(2020)
Article
Engineering, Civil
George C. Tsiatas, Aristotelis E. Charalampakis, Panos Tsopelas
ENGINEERING STRUCTURES
(2020)
Article
Engineering, Civil
George C. Tsiatas, Milija N. Pavlovic
Summary: This article aims to clarify ambiguities in common solution strategies for thin rectangular plates subjected to colinear point loads. It compares an exact solution with a simplified Fourier Series solution, showing the limitations of the latter and the potential for wider applicability to plate shapes with free vertical sides.
Article
Engineering, Civil
Aristotelis E. Charalampakis, George C. Tsiatas, Panos Tsopelas
Summary: This paper utilizes the energy flow in rocking dynamics of rigid blocks to explain their response details and overturning conditions. Based on the conservation of energy, exact criteria for a rigid block to overturn in the free vibration regime are established for the first time in both nonlinear and linear theory. Analytical solutions for the nonlinear free rocking problem and an approximate analytical solution for the forced rocking problem are derived. By employing the newly derived overturning criterion, richer overturning spectra are constructed, and the new characteristics are elucidated using color maps. Finally, new results regarding the design of solid blocks against different acceleration pulses are presented.
EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS
(2022)
Article
Materials Science, Composites
George C. Tsiatas, Aristotelis E. Charalampakis
Summary: This work presents a new analysis and design methodology for laminated composite beams. It formulates the problem for both symmetric and antisymmetric ply-stacking configurations based on a refined higher-order shear deformation theory. The solution is obtained using the Analog Equation Method (AEM), and the design process employs the Differential Evolution (DE) metaheuristic optimization algorithm. Numerical examples demonstrate the applicability and effectiveness of the proposed methodology. The results indicate the importance of aligning the principal material orientation with the longitudinal axis for minimizing deflection and the superior robustness of Hashin's failure criterion in the strength optimization problem.
JOURNAL OF COMPOSITE MATERIALS
(2022)
Article
Mechanics
George C. Tsiatas, Ioannis N. Tsiptsis, Antonis G. Siokas
JOURNAL OF APPLIED AND COMPUTATIONAL MECHANICS
(2020)
Article
Construction & Building Technology
George C. Tsiatas, Antonis G. Siokas, Evangelos J. Sapountzakis
FRONTIERS IN BUILT ENVIRONMENT
(2018)
Article
Construction & Building Technology
Aristotelis E. Charalampakis, George C. Tsiatas
FRONTIERS IN BUILT ENVIRONMENT
(2018)
Article
Construction & Building Technology
Aristotelis E. Charalampakis, George C. Tsiatas
FRONTIERS IN BUILT ENVIRONMENT
(2018)
Article
Mechanics
George C. Tsiatas, Nick G. Babouskos
COMPOSITE STRUCTURES
(2017)
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)