Earthquake Engineering & Structural Dynamics最新文献_第10页

Development of a novel rocking connection for tubular steel bridge piers: A proof of concept study 为钢管桥墩开发新型摇动连接：概念验证研究

IF 4.3 2区工程技术

Earthquake Engineering & Structural Dynamics Pub Date : 2024-07-02 DOI: 10.1002/eqe.4185

Akbar Vasseghi, Mohammad Hossein Mahmoudi

{"title":"Development of a novel rocking connection for tubular steel bridge piers: A proof of concept study","authors":"Akbar Vasseghi, Mohammad Hossein Mahmoudi","doi":"10.1002/eqe.4185","DOIUrl":"10.1002/eqe.4185","url":null,"abstract":"This paper introduces a novel pocket-type dissipative rocking connection for self-centering tubular steel bridge piers. Unlike typical self-centering systems, this connection does not utilize post-tensioned tendons and relies solely on gravity load for re-centering, but it employs a redundant mechanism to prevent geometrical instability and collapse. The connection consists of several components, including an embedded sleeve component and a ring plate bearing against the column and frictionally connected to the embedded component. During rocking, the ring plate provides two-level energy dissipation through friction and material yielding. In this connection, any residual drift could be easily recovered by untightening bolts in the frictional connection of the ring plate. A finite element model with contact elements at surface interfaces between different components was developed to simulate the response of the connection under vertical and lateral loading. Finite element analyses and quasi-static cyclic tests of a quarter-scale specimen demonstrated that the connection could provide adequate lateral resistance and a flag-shaped hysteresis response with marginal or recoverable residual displacements. Test results confirmed that the connection can sustain large lateral drifts (up to 7.6%) without structural damage. Test results also indicated that the hysteresis characteristics of the connection are highly influenced by the type and configuration of the washers in the bolt assembly of the frictional connection. The lateral strength and energy dissipation properties of the connection were greatly improved when conical spring washers were added to the bolt assembly.","PeriodicalId":11390,"journal":{"name":"Earthquake Engineering & Structural Dynamics","volume":"53 11","pages":"3527-3545"},"PeriodicalIF":4.3,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141688563","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}

引用次数: 0

Critical liquefied soil thickness for response patterns of piles in inclined liquefied ground overlain by nonliquefied crust 非液化地壳覆盖的倾斜液化地层中桩响应模式的临界液化土厚度

IF 4.3 2区工程技术

Earthquake Engineering & Structural Dynamics Pub Date : 2024-07-01 DOI: 10.1002/eqe.4190

Jiunn-Shyang Chiou, Yuan-Man Hsu, Cheng-En Ho

{"title":"Critical liquefied soil thickness for response patterns of piles in inclined liquefied ground overlain by nonliquefied crust","authors":"Jiunn-Shyang Chiou, Yuan-Man Hsu, Cheng-En Ho","doi":"10.1002/eqe.4190","DOIUrl":"10.1002/eqe.4190","url":null,"abstract":"Lateral spreading has historically caused extensive pile failure in liquefaction-prone areas during strong earthquakes. A critical design scenario involves piles embedded in lateral spreading ground composed of a nonliquefied soil crust overlying a liquefied layer; it is critical because both layers can exert loads on the piles. Different thicknesses of the liquefied soil and the upper nonliquefied crust may engender different pile response patterns. Accordingly, to investigate factors influencing the lateral responses of a single pile embedded in liquefied ground with a nonliquefied crust, we conduct parametric analyses. The effects of liquefied and nonliquefied soil thicknesses are analyzed first, followed by those of pile-head rotational restraint, pile diameter, and lateral spreading displacement. We observe two main pile response patterns for various liquefied soil thicknesses. The ground can be categorized into thin or thick liquefied ground depending on whether its liquefied soil thickness is less or greater than a critical value, namely, critical liquefied soil thickness; this critical thickness is dependent on the pile-head rotational restraint, pile diameter, and lateral spreading displacement. The difference in the patterns stems from the varying roles of the upper nonliquefied soil layer during lateral spreading. For the thin liquefied ground, the nonliquefied layer contributes to adding lateral spreading force; therefore, the displacement, moment, and shear force responses of the pile increase with the nonliquefied soil thickness. However, for the thick liquefied ground, the nonliquefied layer provides resistance to lateral spreading; therefore, the maximum displacement, moment, and shear force of the pile initially decreases and then gradually increases with the nonliquefied soil thickness.","PeriodicalId":11390,"journal":{"name":"Earthquake Engineering & Structural Dynamics","volume":"53 11","pages":"3630-3648"},"PeriodicalIF":4.3,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141711801","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}

引用次数: 0

Fast Bayesian modal identification with known seismic excitations 利用已知地震激励进行快速贝叶斯模态识别

IF 4.3 2区工程技术

Earthquake Engineering & Structural Dynamics Pub Date : 2024-06-29 DOI: 10.1002/eqe.4181

Peixiang Wang, Binbin Li, Fengliang Zhang, Xiaoyu Chen, Yanchun Ni

{"title":"Fast Bayesian modal identification with known seismic excitations","authors":"Peixiang Wang, Binbin Li, Fengliang Zhang, Xiaoyu Chen, Yanchun Ni","doi":"10.1002/eqe.4181","DOIUrl":"https://doi.org/10.1002/eqe.4181","url":null,"abstract":"Fast and accurate identification of structural modal parameters after an earthquake is crucial for assessing structural conditions and facilitating repair. With the development of modern earthquake observation techniques, the recorded ground motion can be leveraged as extra input information for modal identification, enabling the experimental modal analysis applicable. This study develops a Bayesian modal identification algorithm that aims at estimating the most probable value (MPV) of modal parameters and their identification uncertainty. Incorporating the recorded seismic input, the algorithm utilizes with the structural equation of motion in the frequency domain to formulate the likelihood function and adopts a constrained Laplace method for Bayesian posterior approximation of modal parameters. With the aid of complex matrix calculus, an iterative scheme is developed, allowing a fast search of the MPV of modal parameters and an analytical evaluation of the posterior covariance matrix. The performance of the proposed algorithm is validated by examples with synthetic, laboratory and field data, respectively. In addition, its effectiveness on predicting structural responses under a future earthquake is illustrated, showing its potential for various downstream applications in seismic structural health monitoring.","PeriodicalId":11390,"journal":{"name":"Earthquake Engineering & Structural Dynamics","volume":"53 11","pages":"3439-3468"},"PeriodicalIF":4.3,"publicationDate":"2024-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141973741","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}

引用次数: 0

Shake table tests of steel moment resisting frame with self-centering SMA-based isolators 带自定心 SMA 型隔振器的钢制抗弯框架振动台试验

IF 4.3 2区工程技术

Earthquake Engineering & Structural Dynamics Pub Date : 2024-06-28 DOI: 10.1002/eqe.4183

Jiahao Huang, Songye Zhu, Bin Wang, Zhi-peng Chen

{"title":"Shake table tests of steel moment resisting frame with self-centering SMA-based isolators","authors":"Jiahao Huang, Songye Zhu, Bin Wang, Zhi-peng Chen","doi":"10.1002/eqe.4183","DOIUrl":"https://doi.org/10.1002/eqe.4183","url":null,"abstract":"This paper investigates a steel moment resisting frame (MRF) with a novel type of self-centering (SC) base isolators, wherein superelastic shape memory alloy (SMA) U-shaped dampers (SMAUDs) work as core components. A two-story steel MRF model equipped with two SMAUD-based isolators was designed and built in the laboratory, and a series of shake table tests were conducted to examine the dynamic behavior and seismic performance of the frame. Throughout all the tests, no interventions, such as repair or replacement of frame or isolator members, were done. Shake table test results demonstrated that the SMAUD-based isolators could withstand multiple strong earthquakes with stable SC behavior. The utilization of SMAUD-based isolators provided effective protection for the frame, enabling it to restore its original position with minimal structural damage. A numerical model of the tested steel MRF with SMAUD-based isolators was also built. The results obtained from the numerical analyses agreed with those of the shake table tests satisfactorily. A comparative study of the seismic performance between the MRF with SMAUD-based isolators and the MRF with traditional steel U-shaped damper-based isolators was also conducted in the shake table tests. The results showed that SMAUD-based isolators not only inherit the isolation function of conventional isolators to protect the frame but also possess an SC ability to eliminate residual isolator deformation effectively. Moreover, SMAUD-based isolators demonstrate remarkable resilience to withstand multiple strong seismic events without any need for repair or replacement.","PeriodicalId":11390,"journal":{"name":"Earthquake Engineering & Structural Dynamics","volume":"53 11","pages":"3489-3513"},"PeriodicalIF":4.3,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eqe.4183","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141973729","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}

引用次数: 0

Seismic fragility analysis of girder bridges under mainshock-aftershock sequences based on input-output hidden Markov model 基于输入输出隐马尔可夫模型的主震-余震序列下梁桥的地震脆性分析

IF 4.3 2区工程技术

Earthquake Engineering & Structural Dynamics Pub Date : 2024-06-27 DOI: 10.1002/eqe.4182

Libo Chen, Liangpeng Chen, Jianhong Zhou

{"title":"Seismic fragility analysis of girder bridges under mainshock-aftershock sequences based on input-output hidden Markov model","authors":"Libo Chen, Liangpeng Chen, Jianhong Zhou","doi":"10.1002/eqe.4182","DOIUrl":"https://doi.org/10.1002/eqe.4182","url":null,"abstract":"Current seismic design codes for bridge structures do not account for the influence of aftershock sequences, which, to some extent, overestimate the seismic performance for bridges subjected to mainshock-aftershock (MS-AS) scenarios. To address the great need for ground motion sequences tailored to specific research sites for fragility analysis, this study proposes a method for generating artificial MS-AS ground motion sequences based on the evolutional bimodal Kanai–Tajimi model and the Epidemic–Type Aftershock Sequence model. We establish a framework for MS-AS fragility analysis using an input–output Hidden Markov Model (IOHMM), where the damage states (DS) of bridge piers are considered unobservable and are inferred statistically through damage indices in an unsupervised manner. Model parameters are trained using intensity measure (IM) sequences and damage index (DI) sequences. Fragility curves for both the mainshock and state-dependent aftershocks considering multiple aftershocks are formulated based on the initial state probability and state transition probabilities of the proposed IOHMM. The fragility analysis results reveal that as the initial seismic damage level increases, the probability of aftershocks causing higher damage levels in the structure also increases, highlighting the significant impact of aftershocks on structural damage increments. Furthermore, we extend the proposed model to a bivariate seismic intensity measure and develop fragility surfaces. The proposed framework provides a novel approach and insights for tackling seismic fragility under multiple aftershocks.","PeriodicalId":11390,"journal":{"name":"Earthquake Engineering & Structural Dynamics","volume":"53 11","pages":"3469-3488"},"PeriodicalIF":4.3,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141973707","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}

引用次数: 0

Shake table testing and finite element modeling of a modular prefabricated concrete bridge-like specimen accounting for geometry imperfections and additional damping 考虑几何缺陷和附加阻尼的模块化预制混凝土类桥梁试件的振动台试验和有限元建模

IF 4.3 2区工程技术

Earthquake Engineering & Structural Dynamics Pub Date : 2024-06-27 DOI: 10.1002/eqe.4189

Antonios A. Katsamakas, Michalis F. Vassiliou, Charalampos Mouzakis

{"title":"Shake table testing and finite element modeling of a modular prefabricated concrete bridge-like specimen accounting for geometry imperfections and additional damping","authors":"Antonios A. Katsamakas, Michalis F. Vassiliou, Charalampos Mouzakis","doi":"10.1002/eqe.4189","DOIUrl":"https://doi.org/10.1002/eqe.4189","url":null,"abstract":"This paper presents the shake table testing and finite element (FE) modeling of a modular prefabricated concrete bridge-like specimen. The specimen comprised four equal-height cylindrical reinforced concrete (RC) columns capped with an RC slab. The structural connections were non-monolithic. Hence, controlled relative motion of the members, including rocking (uplift) of the piers, was allowed. The columns were connected to the slab with stiff tendons that provided positive post-uplift stiffness. The specimen was subjected to 184 triaxial shake table tests, so that a statistical validation of numerical models can be performed. Subsequently, a detailed three-dimensional FE model of the bridge was developed. The objectives of the present study were to: i) investigate the shake table response of a modular bridge with positive post-uplift stiffness under multiple ground motions, ii) develop an FE model of the proposed structural system, iii) investigate the influence of geometrical imperfections on rocking bridges, and iv) evaluate the efficiency of using additional dissipative rebars. After being subjected to 184 shake table tests, the specimen showed zero damage, moderate displacements and tendon forces (TFs), low slab torsion, and zero residual displacements. The shake table tests were practically repeatable. The proposed FE model accurately captured the experimental results. Geometrical imperfections heavily affect the response of negative stiffness systems. However, they have a marginal influence on positive stiffness systems. When comparing systems with equivalent uplift resistance and post-uplift stiffness, the use of additional dissipative rebars results in lower slab torsion and TFs, provided that the rebars do not fracture.","PeriodicalId":11390,"journal":{"name":"Earthquake Engineering & Structural Dynamics","volume":"53 11","pages":"3607-3629"},"PeriodicalIF":4.3,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eqe.4189","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141973706","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}

引用次数: 0

Hybrid data-driven and physics-based simulation technique for seismic response evaluation of steel buckling-restrained braced frames considering brace fracture 考虑支撑断裂的钢屈曲约束支撑框架地震响应评估的数据驱动和物理模拟混合技术

IF 4.3 2区工程技术

Earthquake Engineering & Structural Dynamics Pub Date : 2024-06-25 DOI: 10.1002/eqe.4176

Ali Sadrara, Siamak Epackachi, Ali Imanpour, Mohammad Zaman Kabir

{"title":"Hybrid data-driven and physics-based simulation technique for seismic response evaluation of steel buckling-restrained braced frames considering brace fracture","authors":"Ali Sadrara, Siamak Epackachi, Ali Imanpour, Mohammad Zaman Kabir","doi":"10.1002/eqe.4176","DOIUrl":"https://doi.org/10.1002/eqe.4176","url":null,"abstract":"This paper proposes a hybrid data-driven and physics-based simulation technique for seismic response evaluation of steel Buckling-Restrained Braced Frames (BRBFs) considering brace fracture. Buckling-Restrained Brace (BRB) fracture is represented by cumulative plastic deformation capacity. A dataset, consisting of 95 past BRB laboratory tests and 120 simulated BRB responses generated using the finite element method, is first developed. An Artificial Neural Network-based (ANN) predictive model is then trained using the training dataset to estimate the cumulative plastic deformation of BRBs. The prediction capability of the ANN-based predictive model is validated using the training dataset and an existing regression-based predictive model. In the second part of the paper, an hybrid simulation technique combining the data-driven model and physics-based numerical modeling is presented to conduct the nonlinear time history analysis, followed by 1) validation against a full-scale BRBF testing and 2) demonstration of the proposed simulation technique using a six-story BRBF. The results confirm that the proposed predictive model can predict the BRB fracture with sufficient accuracy. Furthermore, the hybrid data-driven physics-based simulation technique can be used as a powerful tool for dynamic analysis of BRBFs considering BRB fracture.","PeriodicalId":11390,"journal":{"name":"Earthquake Engineering & Structural Dynamics","volume":"53 11","pages":"3358-3380"},"PeriodicalIF":4.3,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141973735","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}

引用次数: 0

Damage-informed ground motion and semi-empirical fragility assessment 以损害为依据的地面运动和半经验脆性评估

IF 4.3 2区工程技术

Earthquake Engineering & Structural Dynamics Pub Date : 2024-06-24 DOI: 10.1002/eqe.4184

Iunio Iervolino, Annalisa Rosti, Andrea Penna, Massimiliano Giorgio

{"title":"Damage-informed ground motion and semi-empirical fragility assessment","authors":"Iunio Iervolino, Annalisa Rosti, Andrea Penna, Massimiliano Giorgio","doi":"10.1002/eqe.4184","DOIUrl":"https://doi.org/10.1002/eqe.4184","url":null,"abstract":"Calibrating parametric fragility curves via empirical damage data is one of the standard approaches to derive seismic structural vulnerability models. Fragilities based on empirical data require the characterization of the ground motion (GM) intensity at the building sites in the area affected by the earthquake producing the observed damages. This is commonly conducted via ShakeMap, that is, a map of the expected values of a Gaussian random field (GRF) of the logarithms of a GM intensity measure conditional to magnitude, location, and possibly a set of recordings of the earthquake. Once that intensity and damage data at the same sites are available, the typical approach calibrates a two-parameter fragility model. However, ShakeMap estimates are affected by uncertainty deriving from that of the GM model used to characterize it. Furthermore, such an uncertainty can be reduced by building damage data, which provide information on the shaking intensity at the sites where damage is observed. It is shown herein that if this uncertainty is not addressed, also considering the shaking information provided by damage, the estimates of the fragility parameters obtained using a median ShakeMap only can be biased, and a recommended maximum likelihood estimation procedure – which exploits the expectation maximization algorithm – is provided. These arguments are illustrated via an application considering damage data from the 2009 L'Aquila earthquake in central Italy.","PeriodicalId":11390,"journal":{"name":"Earthquake Engineering & Structural Dynamics","volume":"53 11","pages":"3514-3526"},"PeriodicalIF":4.3,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141973691","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}

引用次数: 0

The dynamic behaviour of flexible oscillators rocking and sliding on concentrated springs 集中弹簧上摇摆和滑动的柔性振荡器的动态行为

IF 4.3 2区工程技术

Earthquake Engineering & Structural Dynamics Pub Date : 2024-06-23 DOI: 10.1002/eqe.4178

Zheng-You Zhang, Manolis N. Chatzis, Sinan Acikgoz

{"title":"The dynamic behaviour of flexible oscillators rocking and sliding on concentrated springs","authors":"Zheng-You Zhang, Manolis N. Chatzis, Sinan Acikgoz","doi":"10.1002/eqe.4178","DOIUrl":"https://doi.org/10.1002/eqe.4178","url":null,"abstract":"This study presents the Flexible Rocking Model on Concentrated Springs (FRMCS), developed to investigate 2D laterally flexible oscillators rocking and sliding on deformable support media during ground excitations. In this model, concentrated vertical springs and viscous dampers simulate the contact forces from support medium at the corners of the body; the tensionless vertical contact element is linear in compression. Horizontal concentrated springs and linear viscous dampers simulate the frictional behaviour at the corners; the constitutive law for the springs models elastic deformations and sliding (according to Coulomb's friction law). With these elements, FRMCS can model the response of a rocking body which can experience sliding and free-flight phases of motion. The consideration of the flexibility of the support medium enables the evaluation of the forces exerted by the support medium on the structure during an impact. In this study, the FRMCS response is first compared to a previous model where the support medium deformability and the effects of sliding and free-flight are ignored. Then, the responses of four configurations, which feature either stiff or soft lateral springs and stiff or soft high-grip support media, are examined under the influence of pulse excitations. Finally, to understand the potential influence of sliding, a configuration with a low-grip support medium is explored. The comparative influence of lateral flexibility and support medium deformability and sliding is quantified with stability diagrams and various response spectra, describing structural force and moment demands.","PeriodicalId":11390,"journal":{"name":"Earthquake Engineering & Structural Dynamics","volume":"53 11","pages":"3405-3426"},"PeriodicalIF":4.3,"publicationDate":"2024-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eqe.4178","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141973688","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}

引用次数: 0

Theoretical analysis and experimental validation of multi-level friction damping system 多级摩擦阻尼系统的理论分析和实验验证

IF 4.3 2区工程技术

Earthquake Engineering & Structural Dynamics Pub Date : 2024-06-23 DOI: 10.1002/eqe.4187

Chia-Shang Chang Chien, Mei-Ting Guo

{"title":"Theoretical analysis and experimental validation of multi-level friction damping system","authors":"Chia-Shang Chang Chien, Mei-Ting Guo","doi":"10.1002/eqe.4187","DOIUrl":"https://doi.org/10.1002/eqe.4187","url":null,"abstract":"Most traditional passive friction dampers are limited to the design of single activated energy dissipation mechanism; therefore, when the seismic intensity is not strong enough to activate the mechanism, traditional friction dampers can only increase stiffness of the structure just like braces; only when the mechanism is activated will the energy dissipation elements perform energy absorption and assist the structure to absorb received seismic energy. The objective of this study is to improve this defect of traditional friction dampers, developing a Multi–Level Friction Damper (MFD) with a two-stage energy dissipation mechanism, helping building structures (e.g., hospitals, high-tech plants) reduce the acceleration responses of the superstructure. MFDs are proven to provide more comprehensive protection and have higher energy dissipation benefits than traditional friction dampers by the validation of numerical analysis and shaking table test. The study in turn performed parameter fitting with the results of the numerical simulation analysis and shaking table test, and the experimental results turned out to be satisfactory, validating the accuracy of the theoretical formulas.","PeriodicalId":11390,"journal":{"name":"Earthquake Engineering & Structural Dynamics","volume":"53 11","pages":"3565-3587"},"PeriodicalIF":4.3,"publicationDate":"2024-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141973690","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}

引用次数: 0