Earthquake Engineering & Structural Dynamics最新文献

{"title":"Evaluation of the Impact of Incident Wavefield Modeling on Soil-Structure Interaction of Buildings Using Broadband Physics-Based 3D Earthquake Simulations","authors":"Junfei Huang, David McCallen","doi":"10.1002/eqe.4350","DOIUrl":"https://doi.org/10.1002/eqe.4350","url":null,"abstract":"<p>Despite the complexity of real earthquake motions, the incident wavefield excitation for soil-structure interaction (SSI) analysis is conventionally derived from one-dimensional site response analysis (1D SRA), resulting in idealized, decoupled vertically incident shear and compressional waves for the horizontal and vertical components of the wavefield, respectively. Recent studies have revealed potentially significant deviation of the 1D free-field predictions from the actual three-dimensional (3D) site response and obtained physical insights into the mechanistic deficiencies of this simplified approach. Particularly, when applied to vertical motion estimation, 1D SRA can lead to consistent overprediction due to the refraction of inclined S waves in the actual wavefield that is not correctly accounted for in the idealized vertical P wave propagation model. However, in addition to the free-field site response, seismic demands on structures and non-structural components are also influenced by the dynamic characteristics of the structure and SSI effects. The extent to which the utilization of vertically propagating waves influences the structural system response is currently not well understood. With the recent realization of high-performance broadband physics-based 3D ground motion simulations, this study evaluates the impact of incident wavefield modeling on SSI analysis of representative building structures based on two essential ingredients: (1) realistic spatially dense simulated ground motions in shallow sedimentary basins as the reference incident motions for the local SSI model and (2) high-fidelity direct modeling of the soil-structure system that fully honors the complexity of the incident seismic waves. Numerical models for a suite of archetypal two-dimensional (2D) multi-story building frames were developed to study their seismic response under the following incident wavefield modeling conditions: (1) SSI models with reference incident waves from the 3D earthquake simulation, (2) SSI models with idealized vertically incident waves based on 1D SRA, and (3) conventional fixed-base models with base translational motions from 1D SRA. The impact of these modeling choices on various structural and non-structural demands is investigated and contrasted. The results show that, for the horizontal direction, the free-field linear and nonlinear site amplification and subsequent dynamic filtering of the base motions within the structure can be reasonably captured by the assumed vertically propagating shear waves. This leads to generally fair agreements for structural demands controlled by horizontal motions, including peak inter-story drifts and yielding of structural components. In contrast, vertical seismic demands on structures are overpredicted in most cases when using the 1D wavefields and can result in exacerbated structural damage. Special attention should be given to the potentially severe vertical floor accelerations predicted by the 1D ","PeriodicalId":11390,"journal":{"name":"Earthquake Engineering & Structural Dynamics","volume":"54 9","pages":"2339-2362"},"PeriodicalIF":4.3,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eqe.4350","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144256582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Estimation of Lateral Drifts of RC Wall Structural System by Monitored Coupling Beams","authors":"Yu-Jiang Zhou,&nbsp;Xiao-Ting Wang,&nbsp;Jie Chen,&nbsp;Dan Xu,&nbsp;Yao Cui,&nbsp;Tao Wang","doi":"10.1002/eqe.4364","DOIUrl":"https://doi.org/10.1002/eqe.4364","url":null,"abstract":"<div>\u0000 \u0000 <p>This study aims to enhance understanding of seismic damage patterns of RC wall structural system (RCW) by monitoring the mechanical behavior of coupling beams. The coupling beam, configured with elastic steel truss and friction dampers, is able to consume massive energy during earthquakes, and continuously get the complete histories of sustained forces and deformations by measuring strains of truss diagonal web members and the sliding of friction dampers, respectively. The histories of sliding and force are useful to comprehensively understand the status of dampers and the lateral deformation of coupled wall systems, which further determine the seismic damage state of the overall structure and whether the dampers shall be replaced after an earthquake. In this paper, a series of quasi-static tests were first performed on the proposed coupling beams. The results from the tests indicated that the force contribution of truss chord members gradually increased in a nonlinear pattern with respect to the deformation of coupling beam. This was attributed to the axial force sustained by the coupling beam. Then a theoretical model was proposed to build up the relationship between the strain of diagonal web members and the sustained shear force. The coefficient was given by the equation derived from the simplified model, which provides a prediction with the largest error of 10%. Subsequently, the measured sliding displacements of friction dampers were correlated to the lateral deformation of RC walls considering the bending, shearing, and axial compression of coupled walls. This relationship was examined by a quasi-static test on a three-story coupled wall substructure, and acceptable prediction results can be obtained. These correlations make it possible to assess the damage state of the overall building. The findings of this study not only contribute to the development of a more accurate theoretical model for coupling beams but also offer a practical monitoring technique.</p>\u0000 </div>","PeriodicalId":11390,"journal":{"name":"Earthquake Engineering & Structural Dynamics","volume":"54 9","pages":"2325-2338"},"PeriodicalIF":4.3,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144256520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Diffraction and Radiation Effects of the Multi-Body Pontoon System Under the Combination of Earthquakes and Waves","authors":"Jialei Yan,&nbsp;Ruicong Wu,&nbsp;Xiuwen Yuan,&nbsp;Jiabin Liu,&nbsp;Anxin Guo","doi":"10.1002/eqe.4358","DOIUrl":"https://doi.org/10.1002/eqe.4358","url":null,"abstract":"<div>\u0000 \u0000 <p>This study aims to elucidate the “shielding effect” of the preceding pontoon on the target pontoon in a multi-body system under multiple disasters, focusing on the influencing mechanisms of diffraction and radiation effects as well as fluid-structure interaction. A series of scaled model tests were conducted using PIV technology. The experimental results indicate that, under earthquake-wave action, the radiation load in the heave direction of the target pontoon is minimal, whereas the loads in the roll and sway directions are substantial. Both roll and sway loads exhibit sensitivity to the vibration direction and frequency of the structure, with a resonance zone for the radiation load observed. Furthermore, the vibration frequency of the structure does not significantly alter the “shielding effect” of the preceding pontoon on the radiation effect experienced by the target pontoon in the multi-body system. Due to the combined effects of multiple hazards, the stability of the flow field surrounding the target structure is closely related to its vibration direction and frequency during earthquake-wave action. The aggregation, quantity, evolution, and decay of vortices are influenced by the structural vibration behavior.</p>\u0000 </div>","PeriodicalId":11390,"journal":{"name":"Earthquake Engineering & Structural Dynamics","volume":"54 9","pages":"2265-2282"},"PeriodicalIF":4.3,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144256471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Friction Characterization and Mitigation in Large-Scale 6DOF Multi-Axial Hybrid Simulation","authors":"Pedram Mortazavi,&nbsp;Xiuyu S. Gao,&nbsp;Shawn You,&nbsp;Steve Barbachyn,&nbsp;Lauren Linderman,&nbsp;Catherine French,&nbsp;Carol Shield,&nbsp;Scott Nesvold","doi":"10.1002/eqe.4363","DOIUrl":"https://doi.org/10.1002/eqe.4363","url":null,"abstract":"&lt;p&gt;In the last few decades, hybrid simulation has become widely used for understanding the response of structural components and systems under extreme loading conditions. Large-scale, three-dimensional (3D), multi-axial testing facilities with six degrees of freedom (6DOF) are versatile testing systems that can be used for testing a variety of structural systems and components. The University of Minnesota Multi-Axial Subassemblage Testing (MAST) facility, which was originally developed in the 1990s, has had recent upgrades to its 6DOF multi-axial pseudo-dynamic hybrid simulation capabilities. One of the well-recognized challenges in using such 6DOF multi-axial setups of this size is the friction within the system, especially in the swivels of actuators, which can lead to numerical instabilities in hybrid simulation if not mitigated or compensated for properly. As such, when using such setups, friction effects on the stability of hybrid simulation must be understood. Characterizing the friction within the setup is not only crucial for understanding whether friction effects must be compensated for during the test, but it is also important for adopting the appropriate friction compensation scheme. Given the inherent complexities of such over-constrained large-scale multi-axial setups, due to their size, capacity, and the intricate interaction within the actuators, characterizing the friction within the system is not trivial. This paper provides an overview of the MAST system and its features, a brief review of selected past projects, and the architecture of the newly upgraded hybrid simulation capabilities. The effects of friction on the stability of hybrid simulation are discussed, and commonly used methods for managing friction or compensating for it are presented. The experiments used to characterize the performance of the MAST testing facility, including the internal friction within the system, are presented. These experiments can serve as a framework for internal friction characterization in similar test setups and can be used by laboratories that are new to using 3D, 6DOF multi-axial test setups. In the end, a suite of validation multi-axial pseudo-dynamic hybrid simulation tests was performed, where all 6DOFs of the MAST system were used in the hybrid simulation control loop. The validation hybrid simulations were performed on a three-story moment resisting frame structure, under the 1994 Northridge earthquake. One of the columns within the building was physically tested at MAST, while the rest of the structure was modeled numerically first in OpenSees, and afterward in Ansys in a repeat test. Results from the pseudo-dynamic hybrid simulation are presented and compared with purely numerical predictions, which validated the system performance. The hydrostatic friction bearings incorporated within the MAST system ensured negligible friction compared to the capacity of the system, with the friction not exceeding 0.23% for the worst-case scenario","PeriodicalId":11390,"journal":{"name":"Earthquake Engineering & Structural Dynamics","volume":"54 9","pages":"2283-2302"},"PeriodicalIF":4.3,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eqe.4363","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144256473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental Research on the Seismic Performance of Self-Centering Precast Concrete Frames With Infill Walls","authors":"Shuang Li,&nbsp;Haopeng Liu,&nbsp;Haoran Wang,&nbsp;Ali Zar,&nbsp;Changhai Zhai","doi":"10.1002/eqe.4365","DOIUrl":"https://doi.org/10.1002/eqe.4365","url":null,"abstract":"<div>\u0000 \u0000 <p>The self-centering structures have shown excellent seismic performance but the presence of infill walls may change the mechanical characteristics of the structures. In order to investigate the effect of infill walls on self-centering structures, three 1/2 scale self-centering precast concrete frames were conducted to cyclic loading tests. The specimens included one bare frame and two frames with infill walls. The test results were analyzed in terms of the experimental response, hysteretic curves, skeleton curves, stiffness degradation, energy dissipation capacity, strain of steel reinforcements, and column base deformation. The results showed that the infill walls had a significant effect on the seismic performance of the self-centering precast concrete frame. Compared to bare frames, the bearing capacity of frames with soft and strong infill walls increased by 10.36% and 52.37%, respectively. However, the presence of infill walls reduces the self-centering capability of the frame. The infill walls shared the load of beams, and reduced the damage at the beam ends. Based on the theoretical analysis and test observations in elastic and post-elastic stages, the process of infill walls affecting the resistance mechanism and self-centering capability was discussed. The accuracy of the proposed equations in the theoretical analyses was verified by the occurrence of crack generation at the beam end and column base, the bearing and self-centering capability at elastic and post-elastic stages.</p>\u0000 </div>","PeriodicalId":11390,"journal":{"name":"Earthquake Engineering & Structural Dynamics","volume":"54 9","pages":"2303-2324"},"PeriodicalIF":4.3,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144256474","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical Estimation of Seismic Earth Pressure on Walls of Basements Underlain by Bedrock","authors":"Choonghyun Lee,&nbsp;Duhee Park,&nbsp;Yong-Gook Lee","doi":"10.1002/eqe.4361","DOIUrl":"https://doi.org/10.1002/eqe.4361","url":null,"abstract":"<p>Dynamic increment of earth pressure is one of the primary parameters in the seismic design of underground basement structures. Both analytical solution and empirical methods developed for rigid walls have been used to estimate the seismic earth pressure. The equations do not account for the important influence of the flexibility ratio (<i>F</i>), which represent the relative stiffness between the structure and the surrounding soil. Most of the equations also do not account for the aspect ratio (<i>L</i>/<i>H</i>) of the basement. A comprehensive suite of dynamic numerical analyses was performed using a range of basement configurations underlain by bedrock and soil profiles to calculate the build-up of seismic pressure on the basement walls. It is demonstrated that both <i>F</i> and <i>L</i>/<i>H</i> have important influences on the seismic earth pressure. Relatively stiff basements with high <i>L</i>/<i>H</i> values are exposed to larger increment of seismic earth pressure compared with flexible structures with low <i>L</i>/<i>H</i> values. Through regression analysis, an empirical procedure to estimate the seismic earth pressure that accounts for both <i>F</i> and <i>L</i>/<i>H</i> are proposed. The residual analysis highlights that the proposed procedure provides reliable predictions and does not introduce bias across all cases considered in this study.</p>","PeriodicalId":11390,"journal":{"name":"Earthquake Engineering & Structural Dynamics","volume":"54 9","pages":"2246-2264"},"PeriodicalIF":4.3,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eqe.4361","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144256501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Risk-Informed, Performance-Based Design of a Seismic Isolation System for a Nuclear Power Plant","authors":"Faizan Ul Haq Mir,&nbsp;Ching-Ching Yu,&nbsp;Mohamed M. Talaat,&nbsp;Benjamin M. Carmichael,&nbsp;Brandon M. Chisholm,&nbsp;Andrew S. Whittaker","doi":"10.1002/eqe.4359","DOIUrl":"https://doi.org/10.1002/eqe.4359","url":null,"abstract":"<div>\u0000 \u0000 <p>A methodology to achieve a user-specified performance target for a seismic base-isolation system for a nuclear power plant (NPP) is presented and demonstrated. The isolation system, composed of both isolators and damping devices, is treated as a structure, system, and component (SSC) per US nuclear practice. Acceptable performance is defined as sufficient horizontal displacement capacity of the isolators and dampers to achieve a user-specified target performance goal (TPG). The methodology involves the generation of a seismic displacement demand curve for the isolation system, expressed as the mean annual frequency of exceedance (MAFE) of a horizontal displacement, and a fragility function for the isolation system. Information is presented on the derivation of an isolation system fragility function. The methodology is described via application to six isolation systems installed beneath an advanced NPP, founded on two different soil domains, and located at Clinch River in East Tennessee, USA.</p>\u0000 </div>","PeriodicalId":11390,"journal":{"name":"Earthquake Engineering & Structural Dynamics","volume":"54 9","pages":"2231-2245"},"PeriodicalIF":4.3,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144256544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical Simulations of Rocking, Keyed Graphite Blocks in the Core of a High-Temperature Gas Reactor","authors":"Sai Sharath Parsi,&nbsp;Andrew S. Whittaker","doi":"10.1002/eqe.4354","DOIUrl":"https://doi.org/10.1002/eqe.4354","url":null,"abstract":"<div>\u0000 \u0000 <p>This paper presents the numerical modeling and dynamic analysis of graphite block assemblies designed for the core of a horizontal compact high-temperature gas reactor (HC-HTGR). The reactor core is composed of prismatic graphite blocks stacked in columns using shear keys. Under earthquake shaking, the dynamic response of a column of blocks is influenced by multiple factors, including rigid-body rocking of the blocks, graphite-to-graphite friction, horizontal and vertical clearances around the shear keys, energy dissipation at contact points, kinematic constraints, and block uplift and disengagement. These effects were characterized through vibration and seismic tests conducted on standalone columns of keyed graphite blocks at the University at Buffalo. The resulting data provided critical insights into their rocking behavior, supporting the development and validation of numerical models for the seismic analysis of these graphite assemblies, as described in this paper. These models are developed using the commercial finite element software package LS-DYNA, with damping and contact parameters calibrated using the test data. The utility of the models is evaluated under a range of harmonic and earthquake inputs. The peak column displacements and block rotations are predicted to within <span></span><math>\u0000 <semantics>\u0000 <mo>±</mo>\u0000 <annotation>$ pm $</annotation>\u0000 </semantics></math>20% of the experimental measurements, with close agreement in transient response histories across columns of varying heights and shaking directions. Parametric studies are conducted to examine the sensitivity of columns’ dynamic response to factors that are challenging to assess experimentally, such as variations in the graphite-to-graphite coefficient of friction, machining tolerances, block alignment, and installation imperfections. The outcomes presented herein directly support the design of the HC-HTGR core and offer valuable insights for reactor developers more broadly.</p>\u0000 </div>","PeriodicalId":11390,"journal":{"name":"Earthquake Engineering & Structural Dynamics","volume":"54 9","pages":"2212-2230"},"PeriodicalIF":4.3,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144256367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of Soil Nonlinearity on Physics-Based Ground Motion Simulation and Their Implications on 1D Site Response Analysis: An Application to Istanbul","authors":"Wenyang Zhang,&nbsp;Yufeng Dong,&nbsp;Jorge G. F. Crempien,&nbsp;Pedro Arduino,&nbsp;Ertugrul Taciroglu","doi":"10.1002/eqe.4360","DOIUrl":"https://doi.org/10.1002/eqe.4360","url":null,"abstract":"<div>\u0000 \u0000 <p>Previously, we have conducted a suite of 57 broadband physics-based ground motion simulations (GMSs) for a region in Istanbul, Turkey, in which soils were modeled as linear elastic materials. However, from a geotechnical earthquake engineering point of view, soil can indeed exhibit nonlinear behavior, especially in shallow crust with soft soil layers and when subjected to strong ground shaking induced by seismic waves, and hence affect the wave propagation and ground motions. To quantitatively investigate the effects of soil nonlinearity on ground motions, in this study, we select four representative earthquake scenarios and perform fully nonlinear broadband (0–8 Hz) GMSs using a 3D bounding surface plasticity model. In addition, utilizing the motions at the bedrock level from 3D simulations, we conduct 1D nonlinear site response analyses (SRAs) for 2912 sites with different bedrock depths and <span></span><math>\u0000 <semantics>\u0000 <msub>\u0000 <mi>V</mi>\u0000 <mi>s</mi>\u0000 </msub>\u0000 <annotation>$V_s$</annotation>\u0000 </semantics></math> profiles. Results indicate that compared to 3D nonlinear simulations, the 3D linear cases can both amplify and de-amplify ground motion intensities, depending on the ground shaking levels, while the 1D nonlinear SRAs are inclined to yield over-estimations, especially for vertical motions. Twelve stations are also selected to further evaluate the applicability of 1D SRA when soil nonlinearity is considered. Some features in 1D soil profiles, such as <span></span><math>\u0000 <semantics>\u0000 <msub>\u0000 <mi>V</mi>\u0000 <mi>s</mi>\u0000 </msub>\u0000 <annotation>$V_s$</annotation>\u0000 </semantics></math> reversal and deep bedrock depth, are shown to yield unreliably under- and over-estimations, and therefore dramatically influence the accuracy of SRA predictions.</p></div>","PeriodicalId":11390,"journal":{"name":"Earthquake Engineering & Structural Dynamics","volume":"54 9","pages":"2194-2211"},"PeriodicalIF":4.3,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144255844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Performance Assessment of Friction Pendulum Bearings in Bridges via Data Assimilation","authors":"Xinhao He,&nbsp;Daichi Kusano,&nbsp;Shigeki Unjoh,&nbsp;Shuichi Fujikura,&nbsp;Takuya Makino,&nbsp;Chiaki Nagao,&nbsp;Akira Shibasaki,&nbsp;Shinsuke Yamazaki,&nbsp;Hiroshi Ogami,&nbsp;Tadayuki Noro","doi":"10.1002/eqe.4356","DOIUrl":"https://doi.org/10.1002/eqe.4356","url":null,"abstract":"<p>Seismic isolation techniques are widely used in regions susceptible to earthquakes. From a long-term maintenance perspective, it is crucial to develop methodologies for assessing the post-installation performance of these systems based on monitored data. Data assimilation techniques provide a versatile framework for addressing various challenges in complex environments by estimating the posterior distribution of unknown system states, enhanced by prior physical knowledge of systems. This study explores the feasibility of assessing the performance of friction pendulum bearing systems (FPSs) in bridges using data assimilation. Specifically, dynamic data from a scaled bridge model in large shaking table tests and from an actual bridge under earthquake conditions are utilized. Both an iterative Bayesian approach and a batch Bayesian approach are applied to address time-variant and time-invariant parameter estimation challenges. The results demonstrate that the state of the bridges and their FPSs can be accurately evaluated under diverse input conditions.</p>","PeriodicalId":11390,"journal":{"name":"Earthquake Engineering & Structural Dynamics","volume":"54 9","pages":"2172-2193"},"PeriodicalIF":4.3,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eqe.4356","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144256052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}