Volume 8: Seismic Engineering最新文献_第7页

Categorization of Dynamic Loading Into Force-Controlled Loading and Displacement-Controlled Loading 动态加载分为力控加载和位移控加载

Volume 8: Seismic Engineering Pub Date : 2018-07-15 DOI: 10.1115/PVP2018-85098

I. Tamura, S. Matsuura, Ryuya Shimazu, K. Kimura

引用次数: 1

Development of Seismic Countermeasures Against Cliff Edges for Enhancement of Comprehensive Safety of Nuclear Power Plants: Cliff Edges Relevant to NPP Building System 提高核电站综合安全的悬崖边地震对策研究&与核电厂建设系统相关的悬崖边

Volume 8: Seismic Engineering Pub Date : 2018-07-15 DOI: 10.1115/PVP2018-85066

A. Nishida, Byunghyun Choi, H. Yamano, T. Takada

{"title":"Development of Seismic Countermeasures Against Cliff Edges for Enhancement of Comprehensive Safety of Nuclear Power Plants: Cliff Edges Relevant to NPP Building System","authors":"A. Nishida, Byunghyun Choi, H. Yamano, T. Takada","doi":"10.1115/PVP2018-85066","DOIUrl":"https://doi.org/10.1115/PVP2018-85066","url":null,"abstract":"This study identified and quantified possible cliff edge effects through a seismic safety evaluation of a nuclear power plant, based on the concepts of risk and defense in depth. Cliff edges of the both physical and knowledge-oriented type were considered in this study. We investigated a seismic isolation effect, etc., for physical cliff edges, and the modeling of the target structure, boundary conditions, etc., for knowledge-oriented cliff edges.\u0000 Response analysis was performed using a sway-rocking (SR) model and a three-dimensional model of the target building. The seismic isolation effect of the base-isolated building was confirmed by comparison to the results of earthquake-resistant building. In the case of a collision with the retaining wall of the base-isolated building, the level of damage was found to depend on the modeling of the collision condition assumed. On the other hand, the study confirmed the differences between the results from the SR model and the three-dimensional model. And the greater fidelity of the three-dimensional model was also confirmed. This paper presents and discusses these results.","PeriodicalId":180537,"journal":{"name":"Volume 8: Seismic Engineering","volume":"76 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":"133282226","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: 2

High-Frequency Responses in Relation to the Use of Explicit Time Integration Method 高频响应与显式时间积分法的使用有关

Volume 8: Seismic Engineering Pub Date : 2018-07-15 DOI: 10.1115/PVP2018-85083

Sungjin Bae

{"title":"High-Frequency Responses in Relation to the Use of Explicit Time Integration Method","authors":"Sungjin Bae","doi":"10.1115/PVP2018-85083","DOIUrl":"https://doi.org/10.1115/PVP2018-85083","url":null,"abstract":"Design of an Independent Spent Fuel Storage Installation (ISFSI) pad requires examining seismic stability and determining the static and dynamic loads of casks in accordance with the provision of 10 CFR 72.212 (Ref. 1). Since spent fuel storage casks are free standing structures on a concrete pad, cask rocking and sliding are expected to occur during an earthquake. NUREG/CR-6865 (Ref. 2) requires that the dynamic analyses consider the effect of soil-and-structure interactions between supporting soil and concrete pad as well as between casks and concrete pad. When casks exhibit rocking or sliding, nonlinear analyses are performed to handle the contact, and explicit time integration analyses with very short period of time step are often used to analyze the dynamic contact behavior of casks.\u0000 Explicit time integration analyses are more prone to contain high-frequency response than implicit time stepping analyses because of the use of very small time step and the limitation of damping model. A cask analysis case is presented in this paper to illustrate high frequency responses associated with the use of Rayleigh mass proportional damping, which is a commonly used damping model for explicit time integration analyses. A modified mass proportional damping expression is proposed to improve the responses of soil and casks.","PeriodicalId":180537,"journal":{"name":"Volume 8: Seismic Engineering","volume":"1 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":"129872594","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

Study on TMD for Long Period Structure Using Air Floating Technique: Investigation of Fundamental Performance 采用气浮技术研究长周期结构的TMD:基本性能研究

Volume 8: Seismic Engineering Pub Date : 2018-07-15 DOI: 10.1115/PVP2018-84943

O. Furuya, H. Kurabayashi, O. Takahashi, Kunio Sanpei, S. Sakamoto, Koji Yamazaki, Manabu Muto

引用次数: 0

Simplified Seismic Response Analysis Method Using Reduced Model of Piping System 基于简化模型的管道系统地震反应分析方法

Volume 8: Seismic Engineering Pub Date : 2018-07-15 DOI: 10.1115/PVP2018-84428

M. Sakai, Ryuya Shimazu, S. Matsuura, I. Tamura

引用次数: 1

Fast Reactor Cores: Seismic Excitation in the Vertical Direction — Numerical Methods 快堆堆芯:垂直方向的地震激励。数值方法

Volume 8: Seismic Engineering Pub Date : 2018-07-15 DOI: 10.1115/PVP2018-84098

D. Broc, G. Artini, Jérome Cardolaccia, Laurent Martin

{"title":"Fast Reactor Cores: Seismic Excitation in the Vertical Direction — Numerical Methods","authors":"D. Broc, G. Artini, Jérome Cardolaccia, Laurent Martin","doi":"10.1115/PVP2018-84098","DOIUrl":"https://doi.org/10.1115/PVP2018-84098","url":null,"abstract":"In the frame of the GEN IV Forum and of the ASTRID Project, a program is in progress in the CEA (France) for the development and the validation of numerical tools for the simulation of the dynamic mechanical behavior of the Fast Reactor cores, with both experimental and numerical parts.\u0000 The cores are constituted of Fuel Assemblies (or FA) and Neutronic Shields (or NS) immersed in the primary coolant (sodium), which circulates inside the Fuel Assemblies. The FA and the NS are slender structures, inserted in a grid plate, which may be considered as beams form a mechanical point of view. The dynamic behavior of this system has to be understood, for design and safety studies.\u0000 This dynamic behavior of the core is strongly influenced by the sodium and by contacts between the beams at the pads level and at the top. The fluid leads to complex interactions between the structures in the whole core. The contacts between the beams limit the relative displacements.\u0000 Two main movements have been considered so far: global horizontal movements under a seismic excitation, and opening of the core.\u0000 Physical and numerical methods and tools have been developed to describe and simulate the dynamic behavior. These methods are integrated in CAST3M, general computer code developed at the CEA Saclay. The assemblies are modeled as beams. The impacts at the pads between the assemblies are taken into account by using a nonlinear model. The Fluid Structure Interaction is taken into account by using homogenization methods.\u0000 This paper is devoted to the improvement of these methods to take into account the vertical component of a seismic excitation. The key points are:\u0000 - the fluid structure coupling in the vertical direction,\u0000 - the modification of the description of the impacts to take into account the vertical displacements of the assemblies,\u0000 - the modification of the boundary condition at the foot of the assembly, in order to take into account the uplift with a nonlinear model.","PeriodicalId":180537,"journal":{"name":"Volume 8: Seismic Engineering","volume":"68 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":"123624777","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

The Fracture Limit of Steel-Frame Members Under Dynamic Repeated Loads Through the Shaking Table Test 通过振动台试验确定了动态重复荷载作用下钢框架构件的断裂极限

Volume 8: Seismic Engineering Pub Date : 2018-07-15 DOI: 10.1115/PVP2018-84830

Kensuke Shiomi, Wada Yusuke

{"title":"The Fracture Limit of Steel-Frame Members Under Dynamic Repeated Loads Through the Shaking Table Test","authors":"Kensuke Shiomi, Wada Yusuke","doi":"10.1115/PVP2018-84830","DOIUrl":"https://doi.org/10.1115/PVP2018-84830","url":null,"abstract":"Recently, much larger earthquakes are considered in the seismic designs of steel-frame structures in Japan. Under these severe ground motions, it is expected that not only the elasto-plastic deformation but also the fracture of the structural members could occur during the earthquakes. And through these situations, the more advanced seismic design or evaluation method which allow the partial destruction inside the structure and prevent from the worst-case scenario like the whole collapse are coming to be demanded. One of the ways to achieve this demand is considering the effects of not only the elasto-plastic deformation but also the fracture of structural members in the seismic analysis. In order for that, it is important to clarify the fracture limit of steel-frame members precisely under the dynamic load. Many static tests to clarify the members’ ultimate behavior were conducted in the past, but the dynamic tests were not well enough.\u0000 In this research, the vibration tests were conducted to clarify the fracture limit of steel-frame members under the dynamic load. The behavior of the steel-frame members until the fracture was obtained by applying the repeated dynamic bending deformation with the shaking table. Also, The FEM analysis for the shaking table test results was conducted. Through the tests and the analysis study which simulates the test results, the mechanism of the member fracture occurred in the test under the dynamic loads were examined.","PeriodicalId":180537,"journal":{"name":"Volume 8: Seismic Engineering","volume":"45 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":"117127255","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

Vibration Reduction Mechanism and NPPs Seismic Safety of TMD Shield Building for AP1000 NPPs AP1000核电站TMD屏蔽建筑减振机理及抗震安全性研究

Volume 8: Seismic Engineering Pub Date : 2018-07-15 DOI: 10.1115/PVP2018-84388

Zheng Gang, Fenghui Shen, Yaodong Chen, Hou Gangling

引用次数: 0

Approximate Formulas for Cylindrical Shell Free Vibration Based on Vlasov’s and Enhanced Vlasov’s Semi-Momentless Theory 基于Vlasov和增强Vlasov半无矩理论的圆柱壳自由振动近似公式

Volume 8: Seismic Engineering Pub Date : 2018-07-15 DOI: 10.1115/PVP2018-84932

I. Orynyak, Y. Dubyk

引用次数: 5

Measurement of Natural Frequencies of the Fluid-Elastic-Coupled Shell Plate Vibration of a Large-Sized Cylindrical Steel Tank by Microtremor Observation 用微震观测方法测量大型圆柱钢储罐流弹耦合壳板振动的固有频率

Volume 8: Seismic Engineering Pub Date : 2018-07-15 DOI: 10.1115/PVP2018-84547

K. Hatayama, S. Zama, S. Yoshida

{"title":"Measurement of Natural Frequencies of the Fluid-Elastic-Coupled Shell Plate Vibration of a Large-Sized Cylindrical Steel Tank by Microtremor Observation","authors":"K. Hatayama, S. Zama, S. Yoshida","doi":"10.1115/PVP2018-84547","DOIUrl":"https://doi.org/10.1115/PVP2018-84547","url":null,"abstract":"We measured the natural frequencies of the fluid-elastic-coupled shell plate vibration excited in a large-sized, flat-bottomed, cylindrical steel tank by observing microtremors at three points of the tank. By comparing the appearance frequencies and the values of the five peaks seen in the observed microtremor spectral ratios of the top or mid-height of the shell plate to the bottom on the tank foundation with the solutions obtained from a fixed-base FEM eigenvalue analysis, we identified the five peaks as belonging to modes (m, n) = (1, 1–5), with m specifying the vertical order and n the circumferential wave number. The measured non-soil-coupled natural frequencies from the spectral ratio agreed fairly well with those obtained from theory using the FEM analysis. The measured frequencies of the fundamental mode (m = n = 1) were also in good agreements with those estimates using a simplified equation assuming a fixed base adopted in seismic codes of the Japanese Fire Service Act. This equation is expected to provide a reliable soil-coupled fundamental-mode natural frequency for a tank resting on firm ground; the storage-soil-coupled effects are presumed to be weak. Without using an FEM analysis, we present a simple approach to determine the non-soil-coupled fundamental-mode natural frequency solely from the observed microtremor spectral ratios. This simplified procedure works very well for the tank examined.","PeriodicalId":180537,"journal":{"name":"Volume 8: Seismic Engineering","volume":"38 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":"123768429","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: 2