Article
Engineering, Civil
Kaivalya M. Lal, Andrew S. Whittaker, Michael C. Constantinou
Summary: This paper presents an innovative seismic isolation solution for safety-class equipment in advanced nuclear power plants. A tall and slender carbon steel vessel was tested to represent various equipment in a nuclear power plant. The test results demonstrate the feasibility of mid-height seismic isolation and its ability to reduce horizontal spectral accelerations.
EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS
(2023)
Article
Chemistry, Multidisciplinary
Gyeong-Hoi Koo, Jin-Young Jung, Jong-Keun Hwang, Tae-Myung Shin, Min-Seok Lee
Summary: This study developed a vertical seismic isolation device essential for the three-dimensional seismic isolation design of nuclear power plant equipment. Through actual tests, the performance of the vertical spring and seismic energy dissipation device was verified, and the optimal design vertical isolation frequencies were determined.
APPLIED SCIENCES-BASEL
(2022)
Article
Acoustics
Xiaochao Su, Lei Hou, Zhubing Zhu, Yushu Chen
Summary: This paper presents a multibody modeling method for seismic analysis of UHV porcelain surge arresters equipped with a seismic isolation device utilizing lead alloy dampers, providing an analytical model for the device and discussing its effectiveness in reducing internal base moment. The proposed method shows potential usefulness in optimal design of the isolation device.
SHOCK AND VIBRATION
(2021)
Article
Nuclear Science & Technology
Sai Sharath Parsi, Kaivalya M. Lal, Benjamin D. Kosbab, Eric D. Ingersoll, Koroush Shirvan, Andrew S. Whittaker
Summary: Standardizing advanced nuclear reactors is crucial for cost reduction and achieving parity with other power sources. This study demonstrates the use of seismic isolation to enable standardized designs for molten salt and high temperature gas reactors. The analysis shows that seismic base isolation allows for construction in higher seismic hazard areas and reduces engineering and licensing time.
NUCLEAR ENGINEERING AND DESIGN
(2022)
Article
Engineering, Civil
Ting-Wei Hsu, Chia-Ming Chang
Summary: This study presents a new isolation system with viscous dampers that can effectively reduce absolute accelerations during small-to-moderate earthquakes and mitigate isolation displacements during severe earthquakes.
EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS
(2021)
Article
Engineering, Civil
Antonios A. Katsamakas, Lorenzo Del Giudice, Sergio I. Reyes, Dario Candebat-Sanchez, Michalis F. Vassiliou
Summary: This paper presents a study on the behavior of a low-cost seismic isolator made of a grout-filled tennis ball rolling on concrete plates. The axial response of the system was characterized, and full-scale isolators were tested under combined compression and lateral cyclic loading. A finite element model was developed to simulate the isolator's response and investigate the influence of rubber thickness. Results show that the isolators have a bilinear lateral cyclic response and suitable values for seismic isolation applications. The specimen-to-specimen variability is minimal, and the rolling friction coefficient is not affected by velocity or temperature.
ENGINEERING STRUCTURES
(2023)
Article
Nuclear Science & Technology
Kaivalya M. Lal, Andrew S. Whittaker, Mettupalayam V. Sivaselvan
Summary: Seismic isolation is being considered for advanced nuclear reactors to mitigate earthquake impacts on safety-class equipment. This study focuses on numerical modeling of mid-height isolated tall, slender vessels to investigate the benefits and provide design recommendations. The results demonstrate that mid-height isolation can substantially reduce seismic demands on tall, slender vessels for various support structure stiffnesses and seismic inputs.
NUCLEAR ENGINEERING AND DESIGN
(2023)
Article
Engineering, Civil
Braulio A. Covarrubias Vargas, P. Scott Harvey, Liang Cao, James M. Ricles, Safwan Al-Subaihawi, Esteban Villalobos Vega
Summary: This study utilizes real-time hybrid simulation to experimentally investigate the design and effectiveness of rolling pendulum-based floor isolation systems for protecting vital building contents during earthquakes.
EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS
(2022)
Article
Mechanics
Aruna Rawat, Vasant Matsagar
Summary: This study investigates the seismic isolation of ground-supported cylindrical liquid storage tanks using the newly developed oblate spheroid base isolation (OSBI) system. The dynamic behavior of the tank mounted on the non-linear OSBI is analyzed using numerical integration technique, and the influence of isolator parameters on the system's performance is studied. The results show that the OSBI system is effective in mitigating the seismic response of liquid storage tanks.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2022)
Article
Engineering, Civil
Jaime Guaman-Cabrera, Juan Carlos de la Llera, Domingo Mery
Summary: This article investigates the dynamic behavior of medical equipment in different support conditions and successfully predicts the rolling, in-plane rotation, rocking, and toppling behavior using nonlinear mathematical models.
EARTHQUAKE SPECTRA
(2023)
Article
Engineering, Mechanical
N. Menga, F. Bottiglione, G. Carbone
Summary: The paper evaluates the effectiveness of nonlinear viscoelastic damping in controlling base-excited vibrations. It investigates the robustness of nonlinear base isolation performance in controlling system response to a wide set of possible excitation spectra, showing that tuned nonlinear RLRB provides loads isolation in a wider range of excitation spectra.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2021)
Article
Engineering, Civil
Kun Huang, Jianhua Li
Summary: This paper proposes a novel seismic isolation non-seismic isolation composite structure system to reduce the seismic responses of adjacent structures. By controlling the seismic isolation and non-seismic isolation structures, the seismic responses are effectively controlled. The paper analyzes the control effect and the effect of time lag using a calculation model and linear quadratic regulator (LQR) optimal control, and addresses the issue of time lag using an improved BP algorithm. The results show that the interacting control of such a system can achieve a good result, and predictive control can effectively reduce the seismic responses.
Article
Construction & Building Technology
Hui Pang, Wen Xu, Junwu Dai, Tao Jiang
Summary: Seismic isolation is a technique used to separate building structures from ground motions during earthquakes. However, there is less emphasis on protecting acceleration-sensitive equipment. This study developed a novel variable-frequency rolling pendulum bearing to protect acceleration-sensitive equipment. Shake table tests showed that the proposed device effectively reduced acceleration and displacement responses. The numerical model of the system was also proposed and validated through simulations.
Article
Multidisciplinary Sciences
Jiawei Cui, Ailan Che, Sheng Li, Yongfeng Cheng
Summary: The study introduces a probabilistic model for assessing seismic risk of substations, effectively evaluating the probability of damage to substations in the Xinjiang region under potential earthquake events.
Article
Engineering, Geological
Davide Forcellini, Saif Alzabeebee
Summary: This research examines the impact of Geotechnical Seismic Isolation (GSI) on the seismic response of bridges, which has been poorly studied in existing literature. Advanced nonlinear dynamic three-dimensional finite element analyses were conducted using OpenSees to assess the influence of GSI. The results suggest that GSI can reduce the seismic effect on bridge columns, but its effect on abutments appears to be less significant. In addition, fragility curves were developed and compared to provide probabilistic insights. This paper provides a useful benchmark for incorporating GSI in bridge design.
BULLETIN OF EARTHQUAKE ENGINEERING
(2023)
Article
Engineering, Geological
Mohammad Hadikhan Tehrani, Philip Scott Harvey
BULLETIN OF EARTHQUAKE ENGINEERING
(2019)
Article
Engineering, Mechanical
R. Wiebe, P. S. Harvey
JOURNAL OF COMPUTATIONAL AND NONLINEAR DYNAMICS
(2019)
Article
Engineering, Civil
P. S. Harvey, T. M. N. Cain
Article
Mechanics
Philip S. Harvey, Richard Wiebe, Thomas M. N. Cain
JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME
(2020)
Article
Engineering, Mechanical
T. M. N. Cain, P. S. Harvey, K. K. Walsh
JOURNAL OF ENGINEERING MECHANICS
(2020)
Article
Engineering, Mechanical
M. H. SoleimaniBabakamali, A. Moghadam, R. Sarlo, M. H. Hebdon, P. S. Harvey Jr
Summary: This study presents a vision-based monitoring method using a single traffic camera to identify the modal properties of traffic signal mast arm structures. The method utilized operational modal analysis and sub-pixel displacements to extract fundamental frequencies and damping ratios of the structure. Vision-based results were validated by comparing them to acceleration data recorded by high-sensitivity accelerometers.
EXPERIMENTAL TECHNIQUES
(2021)
Article
Engineering, Civil
A. Zare Hosseinzadeh, M. H. Tehrani, P. S. Harvey
Summary: This paper introduces a vision-based vibration-monitoring technique that utilizes existing cameras within building structures to extract modal information and assess for damage. The technique tracks cameras' motion to measure structural responses and uses system identification to extract modal information. An experimental study on a lab-scale structure is conducted to assess the effectiveness of the technique.
ENGINEERING STRUCTURES
(2021)
Article
Engineering, Civil
Puthynan Bin, Mohammad H. Tehrani, Mehrun Nisa, P. Scott Harvey, Alexandros A. Taflanidis
Summary: This study investigates the influence of dynamic coupling between the primary structure (PS) and floor isolation systems (FIS) under intense earthquakes, as well as how to mitigate seismic responses through parameter adjustment. The FIS also functions as a dual-mode vibration isolator/absorber system, with displacement-dependent response adaptation.
EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS
(2021)
Editorial Material
Engineering, Mechanical
D. Di Maio, P. S. Harvey
EXPERIMENTAL TECHNIQUES
(2021)
Article
Engineering, Civil
Braulio A. Covarrubias Vargas, P. Scott Harvey, Liang Cao, James M. Ricles, Safwan Al-Subaihawi, Esteban Villalobos Vega
Summary: This study utilizes real-time hybrid simulation to experimentally investigate the design and effectiveness of rolling pendulum-based floor isolation systems for protecting vital building contents during earthquakes.
EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS
(2022)
Article
Engineering, Industrial
Guangyang Hou, Kanthasamy K. Muraleetharan, Vinushika Panchalogaranjan, Paul Moses, Amir Javid, Hussein Al-Dakheeli, Rifat Bulut, Richard Campos, P. Scott Harvey, Gerald Miller, Kirby Boldes, Maha Narayanan
Summary: This paper proposes a probabilistic framework for assessing and evaluating the enhancements of the ice storm resilience of power distribution systems, with a focus on fragility modeling of power distribution components. The framework is able to assess the impact of ice storms on the resilience of power distribution systems and evaluate the cost-effectiveness of resilience enhancement strategies. The proposed framework is demonstrated with a power distribution network in Oklahoma.
RELIABILITY ENGINEERING & SYSTEM SAFETY
(2023)
Article
Engineering, Civil
L. N. Virgin, P. S. Harvey
Summary: It is well-established that narrow beams can buckle laterally when loaded. This study utilizes 3D-printing to compare the effects of different cross-sectional forms on this type of buckling behavior in a fixed cantilever geometry.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
R. Campos, P. S. Harvey, G. Hou
Summary: Recent ice storms in the United States have caused severe tree damage and widespread power outages. Falling trees and branches can block roads and endanger drivers. This study used finite element method and Monte Carlo simulation to analyze trees under ice loads and develop fragility curves. The findings show that leaves significantly affect tree branch damage, which is important due to the increased frequency of early ice storms caused by climate change.
SUSTAINABLE AND RESILIENT INFRASTRUCTURE
(2023)
Article
Acoustics
J. H. Porter, P. S. Harvey
JOURNAL OF VIBRATION AND ACOUSTICS-TRANSACTIONS OF THE ASME
(2019)
Article
Engineering, Manufacturing
J. H. Porter, T. M. Cain, S. L. Fox, P. S. Harvey
VIRTUAL AND PHYSICAL PROTOTYPING
(2019)
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)
