Volume 8: Seismic Engineering最新文献_第5页

Fast Reactor Core Seismic Experiment and Analysis Under Strong Excitation 强激励下快堆堆芯地震试验与分析

Volume 8: Seismic Engineering Pub Date : 2018-07-15 DOI: 10.1115/PVP2018-84466

Tomohiko Yamamoto, Akihisa Iwasaki, K. Kawamura, Shinichiro Matsubara, Hidenori Harada

引用次数: 1

Research and Development of Viscous Fluid Dampers for Improvement of Seismic Resistance of Thermal Power Plants: Part 4 — Experimental Study on Environmental Applicability and Durability of Damper 提高火电厂抗震性能的粘性流体阻尼器的研究与开发:第4部分-阻尼器的环境适用性和耐久性试验研究

Volume 8: Seismic Engineering Pub Date : 2018-07-15 DOI: 10.1115/PVP2018-84556

Go Tanaka, K. Minagawa, K. Aida, S. Fujita

{"title":"Research and Development of Viscous Fluid Dampers for Improvement of Seismic Resistance of Thermal Power Plants: Part 4 — Experimental Study on Environmental Applicability and Durability of Damper","authors":"Go Tanaka, K. Minagawa, K. Aida, S. Fujita","doi":"10.1115/PVP2018-84556","DOIUrl":"https://doi.org/10.1115/PVP2018-84556","url":null,"abstract":"A purpose of this study is an improvement of seismic proof construction for power plants to supply power stably at an emergency. At present, the most common type of power generation in Japan is thermal. In particular, coal-fire becomes base load power. A proposal of this study is that boiler structure is applied vibration control. The way is that a damper used viscous fluid is set instead of stopper between the boiler and the support structure. However, inside temperature of the boiler structure is higher than the environment of the general because it uses burning of coal and steam. Therefore, this paper shows that the damper has applicability for the environment of the boiler structure.\u0000 Then it is necessary for structures to endure earthquake with long duration and long period component in Japan. The 2011 off the Pacific coast of Tohoku Earthquake had the largest energy in history of Japan with them. The damage occurred not only in Tohoku but also in far Tokyo and Osaka. Moreover, it is predicted that large earthquakes with them at the south Pacific coast of Japan occur. This paper shows that the developed damper is effective in earthquake with these characteristics by analyses and component tests.","PeriodicalId":180537,"journal":{"name":"Volume 8: Seismic Engineering","volume":"129 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122547313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Study of Self Powered Active Seismic Isolation Floor Device Using Rotational Inertia Mass Damper 基于转动惯量阻尼器的自供电主动隔震楼板装置研究

Volume 8: Seismic Engineering Pub Date : 2018-07-15 DOI: 10.1115/PVP2018-84354

Keitaro Aoshima, N. Miura, A. Sone

{"title":"A Study of Self Powered Active Seismic Isolation Floor Device Using Rotational Inertia Mass Damper","authors":"Keitaro Aoshima, N. Miura, A. Sone","doi":"10.1115/PVP2018-84354","DOIUrl":"https://doi.org/10.1115/PVP2018-84354","url":null,"abstract":"In recent years, active seismic isolations have been developed actively, but they have a problem of running when external power supply is cut off. To solve this problem, we proposed a self-powered active seismic isolation floor device based on the idea of electric power regeneration. This device can control using regenerated vibration energy from earthquakes, and doesn’t require external energy to produce control force. However, when long-period earthquakes occur, this device can’t regenerate enough electric power to decrease vibration of equipment. The aim of this paper is to propose a new model using a rotating inertia mass damper (inerter) which can decrease vibration of equipment and regenerate electric power more effectively than the previous model. The inerter is a mechanical element corresponding to capacitor in electrical circuits. In this paper, we compared the response and amount of energy regeneration of previous model with those of the new model adding inerter to the previous model. By using its characteristic of rotation of the spindle, the effect of electric power regeneration can be improved for long-period earthquakes. We discuss the usefulness of inerter in self-powered active isolation floor device for long-period earthquakes.","PeriodicalId":180537,"journal":{"name":"Volume 8: Seismic Engineering","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121994432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Seismic Responses From Linear and Nonlinear Dynamic Analyis of RC Shear Walls 钢筋混凝土剪力墙线性和非线性动力分析的地震反应

Volume 8: Seismic Engineering Pub Date : 2018-07-15 DOI: 10.1115/PVP2018-84851

Do Yeon Kim

引用次数: 0

Structural Stability Evaluation of Independent Spent Fuel Storage Casks 独立乏燃料贮存桶结构稳定性评价

Volume 8: Seismic Engineering Pub Date : 2018-07-15 DOI: 10.1115/PVP2018-84602

Gunup Kwon, P. Hoang, Khaled J. Ata

{"title":"Structural Stability Evaluation of Independent Spent Fuel Storage Casks","authors":"Gunup Kwon, P. Hoang, Khaled J. Ata","doi":"10.1115/PVP2018-84602","DOIUrl":"https://doi.org/10.1115/PVP2018-84602","url":null,"abstract":"Most nuclear power plants in the US store the spent fuels in independent spent fuel storage casks and these casks are typically placed on concrete pads outside of the fuel handling building. Under plant design basis events, the spent fuel storage casks should maintain stability without tip-over or direct contact with each other. Sliding and rocking of the casks can be determined using nonlinear dynamic analyses under artificial acceleration input motions. Alternatively, approximate equations developed for sliding and rocking of rigid bodies are used as shown in ASCE 4-16. However, these equations consider rocking and sliding as two separate events. Due to the shortcoming of the approximate method, many power plant owners are required to perform extensive nonlinear analyses to ensure cask stability during seismic events. In this study, an independent spent fuel storage cask model is developed and nonlinear dynamic analyses are conducted with seismic input motions that meet the current US Nuclear Regulatory Commission requirements. The analysis results are compared with the approximate method in ASCE 4-16. Based on the comparison, recommendations are made for the use of the approximate approach.","PeriodicalId":180537,"journal":{"name":"Volume 8: Seismic Engineering","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132607822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research and Development of Three-Dimensional Isolation System for Sodium-Cooled Fast Reactor: Part 1 — Proposal of Analytical Models Based on Loading Tests 钠冷快堆三维隔离系统的研究与开发:第一部分——基于加载试验的分析模型的提出

Volume 8: Seismic Engineering Pub Date : 2018-07-15 DOI: 10.1115/PVP2018-84532

Tsuyoshi Fukasawa, S. Okamura, T. Somaki, Takayuki Miyagawa, M. Uchita, Tomohiko Yamamoto, Tomoyoshi Watakabe, S. Fujita

{"title":"Research and Development of Three-Dimensional Isolation System for Sodium-Cooled Fast Reactor: Part 1 — Proposal of Analytical Models Based on Loading Tests","authors":"Tsuyoshi Fukasawa, S. Okamura, T. Somaki, Takayuki Miyagawa, M. Uchita, Tomohiko Yamamoto, Tomoyoshi Watakabe, S. Fujita","doi":"10.1115/PVP2018-84532","DOIUrl":"https://doi.org/10.1115/PVP2018-84532","url":null,"abstract":"This paper describes that the analytical model for the three-dimensional isolation system [1], which consists of thick rubber bearings, disc springs and oil dampers, is created through loading tests. The new-type analytical models of each element are proposed to improve the prediction accuracy of the seismic response analysis.\u0000 The concept of the three-dimensional isolation system has been proposed to ensure the structural integrity for large reactor vessels. The primary specifications of the three-dimensional isolation system are a horizontal natural period of 3.4 s and a vertical natural period of 0.33 s. The investigations of horizontal isolation performances have been conducted for the various types of isolation devices, beginning with rubber bearings, whereas the previous studies focused on the vertical isolation performances are only a few. Hence, isolation characteristics, such as restoring force and damping force, should be clarified by loading tests using vertical seismic isolation elements, and analytical model to assess the seismic response should be identified on the basis of the loading test results.\u0000 This paper presents a new analytical model with providing of the differential equations to improve the prediction accuracy and demonstrates the seismic performance, including beyond-design-basis ground motion, for the three-dimensional isolation system by the seismic response analysis.","PeriodicalId":180537,"journal":{"name":"Volume 8: Seismic Engineering","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132754666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

A Probabilistic Approach for the Assessment of LOC Events in Steel Storage Tanks Under Seismic Loading 地震荷载作用下钢储罐LOC事件评估的概率方法

Volume 8: Seismic Engineering Pub Date : 2018-07-15 DOI: 10.1115/PVP2018-84374

F. Paolacci, D. Corritore, A. C. Caputo, O. Bursi, Bledar Kalemi

{"title":"A Probabilistic Approach for the Assessment of LOC Events in Steel Storage Tanks Under Seismic Loading","authors":"F. Paolacci, D. Corritore, A. C. Caputo, O. Bursi, Bledar Kalemi","doi":"10.1115/PVP2018-84374","DOIUrl":"https://doi.org/10.1115/PVP2018-84374","url":null,"abstract":"The damage states in a storage tank subjected to seismic loading can induce loss of containment (LOC) with possible consequences (fire, explosion, etc..) both for the surrounding units and people. This aspect is particularly crucial for the Quantitative Risk Analysis (QRA) of industrial plants subjected to earthquakes. Classical QRA methodologies are based on standard LOC conditions whose frequency of occurrence is mainly related to technological accident rather than natural events and are thus useless. Therefore, it is evident the necessity of establishing new procedures for the evaluation of the frequencies of occurrence of LOC events in storage tanks when subjected to an earthquake.\u0000 Consequently, in this work a simple procedure founded on a probabilistic linear regression-based model is proposed, which uses simplified numerical models typically adopted for the seismic response of above ground storage tanks. Based on a set of predetermined LOC events (e.g. damage in the pipes, damage in the nozzles, etc..), whose probabilistic relationship with the local response (stress level, etc..) derives from experimental tests, the probabilistic relationship of selected response parameters with the seismic intensity measure (IM) is established. As result, for each LOC event, the cloud analysis method is used to derive the related fragility curve.","PeriodicalId":180537,"journal":{"name":"Volume 8: Seismic Engineering","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131347523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Fast Reactor Core Seismic Analysis for Verification of Assessment Model of Control Rod 快堆堆芯地震分析验证控制棒评估模型

Volume 8: Seismic Engineering Pub Date : 2018-07-15 DOI: 10.1115/PVP2018-84474

Akihisa Iwasaki, Shinichiro Matsubara, K. Kawamura, Hidenori Harada, Tomohiko Yamamoto

{"title":"Fast Reactor Core Seismic Analysis for Verification of Assessment Model of Control Rod","authors":"Akihisa Iwasaki, Shinichiro Matsubara, K. Kawamura, Hidenori Harada, Tomohiko Yamamoto","doi":"10.1115/PVP2018-84474","DOIUrl":"https://doi.org/10.1115/PVP2018-84474","url":null,"abstract":"The control rod guide tube self-stands on the core support plate. The control rod is inserted in the control rod guide tube, and the control rod hangs from the upper structure of the reactor. At scrum in case of an earthquake, the control rod is detached and it sits on the seating structure in the control rod guide tube (Fig.1). In a vertical earthquake, the control rod guide tube is raised from the core support plate, and the control rod is also raised from the control rod guide tube. Therefore, drawing out may arise. During the earthquake after scrum, the rising behavior is different from the other core elements because the control rod and the control rod guide tube rise interfering each other.\u0000 The control rod guide tube is raised more easily than the fuel assembly by the vertical differential pressure of the core during operation, because the control rod guide tube is lighter than the fuel assembly. Therefore, it is necessary to restrain the rising of the control rod guide tube. The sleeve dashpot structure, in which a sleeve is attached on the upper surface of the receptacle tube, is employed. Moreover, the control rod guide tube is equipped with the control rod dashpot in order to restrain the rising displacement of the control rod.\u0000 This paper summarizes the analysis method of the rising behavior of the single control rod guide tube and the rising behavior of the control rod and the control guide tube after the control rod is inserted.","PeriodicalId":180537,"journal":{"name":"Volume 8: Seismic Engineering","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126764813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Seismic Response of a Cylindrical Water Storage Tank of Nuclear Power Plant 核电站圆柱形储水箱的地震响应

Volume 8: Seismic Engineering Pub Date : 2018-07-15 DOI: 10.1115/PVP2018-84896

S. Matsuura, I. Tamura

引用次数: 0

Research and Development of Viscous Fluid Dampers for Improvement of Seismic Resistance of Thermal Power Plants: Part 6 — Influence of Damper Properties on Vibration Control Performance 提高火电厂抗震性能的粘性流体阻尼器的研究与开发:第6部分-阻尼器性能对振动控制性能的影响

Volume 8: Seismic Engineering Pub Date : 2018-07-15 DOI: 10.1115/PVP2018-84518

K. Minagawa, K. Aida, Go Tanaka, S. Fujita

{"title":"Research and Development of Viscous Fluid Dampers for Improvement of Seismic Resistance of Thermal Power Plants: Part 6 — Influence of Damper Properties on Vibration Control Performance","authors":"K. Minagawa, K. Aida, Go Tanaka, S. Fujita","doi":"10.1115/PVP2018-84518","DOIUrl":"https://doi.org/10.1115/PVP2018-84518","url":null,"abstract":"Coal-fired thermal power generation became a very important power source in Japan after Great East Japan Earthquake [1]. Therefore improvement of seismic reliability of the coal-fired thermal power plants is required, because occurrence of very large earthquakes is expected in Japan. Boilers of coal-fired power plants are usually suspended from the upper end of support structures in order to allow thermal expansion of the boilers [2], so boilers easily sway during earthquakes. In order to suppress the vibration, stoppers made of steel are generally installed between boilers and their support structures. Although stoppers made of steel are effective for vibration suppression, further countermeasure for earthquakes having long duration and many aftershocks is required. Authors have developed a vibration control damper for coal-fired power plants. The damper is set instead of conventional stopper. Construction of the damper is similar to oil dampers, but inner fluid is viscous fluid. In PVP2017, the basic performance of the proposed damper was presented [3–5]. In this paper, damper properties were adjusted in order to improve vibration control performance of the damper. Influence of damper properties on the performance was investigated by sensitivity analyses. In addition, influence of dispersion of damper properties was also investigated. Long period and long duration earthquake waves were considered in the analyses.","PeriodicalId":180537,"journal":{"name":"Volume 8: Seismic Engineering","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132629991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0