Volume 8: Seismic Engineering最新文献_第2页

Study on the Predictive Evaluation Method of Nonlinear Sloshing Wave Crest Impact Load on the Roof of Cylindrical Tanks 圆柱形储罐顶板非线性晃动波峰冲击载荷预测评估方法研究

Volume 8: Seismic Engineering Pub Date : 2019-11-15 DOI: 10.1115/pvp2019-93442

H. Morita, Tomoshige Takata, H. Madokoro, H. Sago, Shinobu Yokoi, Tomohiko Yamamoto

{"title":"Study on the Predictive Evaluation Method of Nonlinear Sloshing Wave Crest Impact Load on the Roof of Cylindrical Tanks","authors":"H. Morita, Tomoshige Takata, H. Madokoro, H. Sago, Shinobu Yokoi, Tomohiko Yamamoto","doi":"10.1115/pvp2019-93442","DOIUrl":"https://doi.org/10.1115/pvp2019-93442","url":null,"abstract":"\u0000 When cylindrical tanks installed on the ground, such as oil tanks and liquid storage tanks, receive strong seismic waves, including the long-period component, motion of the free liquid surface inside the tank called sloshing may occur. If high-amplitude sloshing occurs and the waves collide with the tank roof, it may lead to accidents such as damage of the tank roof or outflow of internal liquid of the tank. Therefore, it is important to predict the wave height of sloshing generated by earthquake motion.\u0000 Sloshing is a type of vibration of free liquid surface, and if the sloshing wave height is small, it can be approximated with a linear vibration model. In this case, the velocity-response-spectrum method using velocity potential can estimate the sloshing wave height under earthquake motion. However, if the sloshing wave height increases, the sloshing becomes nonlinear, and necessary to evaluate the wave height using other methods such as numerical analysis.\u0000 Design earthquake magnitude levels in Japan tend to increase in recent years, long-period components of earthquake wave which act on the sloshing wave height also increase instead of introducing seismic isolation mechanisms. To evaluate sloshing wave crest impact load acting on the roof of a tank, there are few applications which quantitatively evaluated the crest impact load of nonlinear sloshing.\u0000 To construct a simple technique to evaluate the sloshing impact load considering the nonlinear sloshing wave height which acts on a flat roof of cylindrical tanks, it is proposed that flow diagram of evaluating the sloshing impact load which newly took into consideration the nonlinearity of sloshing and the dynamic amplification factor. The applicability of the technique was verified with the shaking table tests results for cylindrical tank and flow-analysis results.","PeriodicalId":180537,"journal":{"name":"Volume 8: Seismic Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116027767","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

Low-Cycle Fatigue of Base-Plate-to-Shell Connection in Uplifting Liquid Storage Tanks Under Seismic Loading 地震荷载作用下抬升储罐底板-壳连接的低周疲劳

Volume 8: Seismic Engineering Pub Date : 2019-11-15 DOI: 10.1115/pvp2019-93419

Giannoula Chatzopoulou, S. Karamanos

引用次数: 0

High Performance Structural Vibration Control by a Preview of the Future Seismic Waveform Generated With a Wave Transmission Network and an AI-Based Estimation System 基于波传输网络和人工智能估计系统的未来地震波形预测的高性能结构振动控制

Volume 8: Seismic Engineering Pub Date : 2019-11-15 DOI: 10.1115/pvp2019-93184

K. Hiramoto, T. Matsuoka, K. Sunakoda

{"title":"High Performance Structural Vibration Control by a Preview of the Future Seismic Waveform Generated With a Wave Transmission Network and an AI-Based Estimation System","authors":"K. Hiramoto, T. Matsuoka, K. Sunakoda","doi":"10.1115/pvp2019-93184","DOIUrl":"https://doi.org/10.1115/pvp2019-93184","url":null,"abstract":"\u0000 We propose a new active vibration control strategy based on the future seismic waveform information obtained in remote observation sites. The waveform information in the remote site is transmitted by a waveform transmission network to the structure under control. The waveform transmission network is realized by interconnecting multiple controlled structures and observation sites. By using the future waveform information obtained through the network, we propose a control law realizing fairly higher control performance over the conventional structural control methodologies. A preview control law consisting of the state-feedback and feedforward control (preview action) is adopted. For the preview action, future values of the disturbance in some time interval are necessary. However, because the future value of the earthquake waveform is unknown, the preview action contributing the performance improvement is generally impossible. To get over this difficulty, an AI-based wave estimation system to estimate the future earthquake waveform is proposed. The wave estimation system is a multi-layered artificial neural network (ANN). Through a small scale simulation study with a recorded earthquake event in Japan, we show that the proposed control method achieves much higher control performance over the conventional LQ-based active control.","PeriodicalId":180537,"journal":{"name":"Volume 8: Seismic Engineering","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132701744","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 Control of Buildings Using Series Rolling-Pendulum Tuned Mass Dampers 串联摆动摆调谐质量阻尼器对建筑物振动的控制

Volume 8: Seismic Engineering Pub Date : 2019-11-15 DOI: 10.1115/pvp2019-93968

Jer-Fu Wang, Chun-Hung Chen, Chang‐Ching Chang, Chi‐Chang Lin

{"title":"Vibration Control of Buildings Using Series Rolling-Pendulum Tuned Mass Dampers","authors":"Jer-Fu Wang, Chun-Hung Chen, Chang‐Ching Chang, Chi‐Chang Lin","doi":"10.1115/pvp2019-93968","DOIUrl":"https://doi.org/10.1115/pvp2019-93968","url":null,"abstract":"\u0000 This paper proposes a passive vibration control device, series rolling-pendulum tuned mass damper (SRPTMD), with a “ball-in-ball” configuration. A conventional pendulum TMD (PTMD) generally requires a long cable length that usually exceeds one-story height for high-rise buildings. A rolling-pendulum TMD (RPTMD) is a mass that can roll on a base with a curvature instead of swaying with a cable, significantly reducing the requirement of vertical rooms. In addition, a ball-in-ball SRPTMD is equivalent to a system with two degrees of freedom in series. This study aimed to derive equations of motion of the primary building-SRPTMD system, conduct a parametric study for SRPTMD, and investigate the structural control performance of an SRPTMD. Results showed that an SRPTMD performed similarly to an RPTMD. One advantage of an SRPTMD is that the fundamental natural frequency of an SRPTMD can be altered to a certain extent by changing the radius ratio of the inner ball to the outer ball, whereas the natural frequency of an RPTMD can only be altered by changing the curvature of its base, which is far more difficult. Another advantage is that the two modal frequencies of an SRPTMD can be manipulated by selecting a specific set of radius ratios between the base, the outer ball, and the inner ball, which means that an SRPTMD has higher potential on multiple modes control.","PeriodicalId":180537,"journal":{"name":"Volume 8: Seismic Engineering","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129006634","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

Experimental Study on Cryogenic Ratcheting of Pre-Strain Austenitic Stainless Steel SS304 预应变奥氏体不锈钢SS304的低温棘轮实验研究

Volume 8: Seismic Engineering Pub Date : 2019-11-15 DOI: 10.1115/pvp2019-93192

Leilei Li, Bingjun Gao, J. Dong, Xu Chen

{"title":"Experimental Study on Cryogenic Ratcheting of Pre-Strain Austenitic Stainless Steel SS304","authors":"Leilei Li, Bingjun Gao, J. Dong, Xu Chen","doi":"10.1115/pvp2019-93192","DOIUrl":"https://doi.org/10.1115/pvp2019-93192","url":null,"abstract":"\u0000 Austenitic stainless steel SS304 is often used as the inner container of the Liquefied Natural Gas (LNG) semitrailer tank. Due to excellent cryogenic ductility and strain-hardening effect, pre-strain of austenitic stainless steel is practicable and conducive to achieve lightweight design of this kind of transporting vehicle. In the present work, we focus on the cryogenic ratcheting of pre-strain austenitic stainless steel SS304. The SS304 specimens were cut from as received plates and butt welded plates which are all pre-strained 8% and 12%. With CARE electronic universal testing machine, ratcheting experiments are performed at both ambient temperature and 110K with different mean stresses and stress amplitudes. Ratcheting strains increase with the mean stress and stress amplitude under cryogenic temperature, but much smaller than that at ambient temperature. And it would quickly get shakedown after ratcheting in a few cycles due to the rapid γ-α′ phase transformation under cryogenic temperature. The cryogenic ratcheting strain generally reduces with the pre-strain amount for both parent material specimens and welded specimens. Compared with parent material specimens, weld specimens yield much smaller cryogenic ratcheting strain due to the hardening effect of welding induced initial ferrite with less slipping system.","PeriodicalId":180537,"journal":{"name":"Volume 8: Seismic Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129977678","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 Active Vibration Control of Seismic Isolation Structure With Variable Gain Using Spectrum Monitoring 基于频谱监测的变增益隔震结构振动主动控制研究

Volume 8: Seismic Engineering Pub Date : 2019-11-15 DOI: 10.1115/pvp2019-93603

Ukyo Fujiwara, N. Miura, A. Sone

{"title":"Study on Active Vibration Control of Seismic Isolation Structure With Variable Gain Using Spectrum Monitoring","authors":"Ukyo Fujiwara, N. Miura, A. Sone","doi":"10.1115/pvp2019-93603","DOIUrl":"https://doi.org/10.1115/pvp2019-93603","url":null,"abstract":"\u0000 In this research, the seismic isolation structure which can switch the active control gains by the characteristics of the earthquake is proposed. As the number of high-rise buildings in urban areas in has increased in recent years, damage due to long-period earthquakes is expected to increase. In this paper, the focus is on the area of velocity response spectrum as an index of long-period earthquake. Then we design the time varying weighting coefficient from the area of the velocity response spectrum obtained from the seismic wave. The long periodicity of the earthquake is judged from the area of the velocity response spectrum calculated from the seismic wave arriving from moment to moment. In addition, we aim to improve the performance of the control system by inputting appropriate control power. We also aimed for energy saving of control by not performing control input within the range where the earthquake does not have a long period. We proposed a method of switching control using time varying weighting factor, designed time varying weighting factor, and confirmed its effectiveness by performing time history response analysis on actual seismic waves.","PeriodicalId":180537,"journal":{"name":"Volume 8: Seismic Engineering","volume":"174 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129988157","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 3 — Characteristics for Elements on Basis of Half-Scale Loading Tests 钠冷快堆三维隔离系统的研究与开发:第3部分:基于半尺度负荷试验的元件特性

Volume 8: Seismic Engineering Pub Date : 2019-11-15 DOI: 10.1115/pvp2019-93475

T. Somaki, Tsuyoshi Fukasawa, S. Okamura, 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 3 — Characteristics for Elements on Basis of Half-Scale Loading Tests","authors":"T. Somaki, Tsuyoshi Fukasawa, S. Okamura, Takayuki Miyagawa, M. Uchita, Tomohiko Yamamoto, Tomoyoshi Watakabe, S. Fujita","doi":"10.1115/pvp2019-93475","DOIUrl":"https://doi.org/10.1115/pvp2019-93475","url":null,"abstract":"\u0000 The authors have been developing the three-dimensional isolation system for a Sodium-cooled Fast Reactor, and reported the details of characteristics of disc springs and vertical oil dampers on the basis of full-scale loading tests [1].\u0000 To clarify the fundamental characteristics of the three-dimensional isolation system, the loading tests using a half-scale assembled specimen have been planned, which is composed of a rubber bearing, disc spring units, the horizontal supporting functions, the smoothly sliding elements, and the rotate restraint elements.\u0000 This paper describes each characteristic of the rubber bearings, disc springs and sliding element before assembling a half-scale specimen of the three-dimensional seismic isolation system by the static or dynamic loading. The applicability of design method, the scaling effect in disc springs, and the dependence on the friction coefficient of the sliding elements were investigated and confirmed. Additionally, the method of minimizing the variation of force-displacement relationships between four disc spring units, each of which has the three disc springs stacked in parallel and six disc springs stacked in series, was studied.\u0000 It should be noted that this paper is in series from Part 2 [1] held on 2018PVP.","PeriodicalId":180537,"journal":{"name":"Volume 8: Seismic Engineering","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134317742","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

Integrated Smart Seismic Risks Management 集成智能地震风险管理

Volume 8: Seismic Engineering Pub Date : 2019-11-15 DOI: 10.1115/pvp2019-94027

M. Ciucci, A. Marino, F. Paolacci, O. Bursi

引用次数: 1

Evaluated Results of Seismic Design Approach Using Inelastic Dynamic Analysis for Equipment 基于非弹性动力分析的设备抗震设计方法评价结果

Volume 8: Seismic Engineering Pub Date : 2019-11-15 DOI: 10.1115/pvp2019-93532

I. Tamura, A. Okubo, Yusuke Minakawa, T. Iijima, Y. Namita, Nobuyoshi Goshima, Masanori Amino, Y. Okuda, Shunji Okuma

{"title":"Evaluated Results of Seismic Design Approach Using Inelastic Dynamic Analysis for Equipment","authors":"I. Tamura, A. Okubo, Yusuke Minakawa, T. Iijima, Y. Namita, Nobuyoshi Goshima, Masanori Amino, Y. Okuda, Shunji Okuma","doi":"10.1115/pvp2019-93532","DOIUrl":"https://doi.org/10.1115/pvp2019-93532","url":null,"abstract":"\u0000 Securing adequate seismic safety margins has been important in safety reviews regarding the seismic design of equipment and piping systems in nuclear power plants, and there exists an increasing need for a more exact method for evaluating these margins. To this end, it is reasonable to take into account the reduction of seismic responses resulting from inelastic deformation. The authors studied this approach utilizing an elastic allowable limit in existing standard. The applicability of the proposed evaluation method was investigated by comparison with the conventional evaluation method. The proposed method consists of an inelastic dynamic analysis and an elastic-static analysis. The elastic-static analysis uses a load obtained from the inelastic dynamic analysis. For the investigation, the result obtained from the proposed method was compared with that obtained from the conventional elastic analysis to quantify the reduction in responses leading to seismic safety margins. For the comparison, the authors constructed three models that simulate a cantilever-type beam, four-legged tank, and core shroud and applied them to the analysis herein, and the applicability of our method was discussed for these models. In this paper, we present three topics. First, we present a scheme for developing the design approach of using inelastic analysis. Second, we report a sensitivity study of model parameters, such as yielding stress and second stiffness, done by analyzing the cantilever-type beam for the proposed method. Finally, we report the application of the method to the four-legged tank and core shroud.","PeriodicalId":180537,"journal":{"name":"Volume 8: Seismic Engineering","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128433658","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

Forensic Estimation of Uplift of an Anchored Tank During the 2011 Earthquake Off the Pacific Coast of Tohoku 2011年日本东北太平洋海岸地震中锚定储罐隆起的法医鉴定

Volume 8: Seismic Engineering Pub Date : 2019-11-15 DOI: 10.1115/pvp2019-93251

Y. Yoshida, T. Taniguchi, T. Nakashima, K. Hatayama

{"title":"Forensic Estimation of Uplift of an Anchored Tank During the 2011 Earthquake Off the Pacific Coast of Tohoku","authors":"Y. Yoshida, T. Taniguchi, T. Nakashima, K. Hatayama","doi":"10.1115/pvp2019-93251","DOIUrl":"https://doi.org/10.1115/pvp2019-93251","url":null,"abstract":"\u0000 The reconnaissance just after the 2011 earthquake off the Pacific coast of Tohoku reported the pulling out of anchor bolts of an upright cylindrical tank. Regarding the tank as an unanchored tank and employing the accelerogram recorded at 2 km off the tank, uplift of the unanchored tank during the 2011 earthquake off the Pacific coast of Tohoku was forensically examined. The time history of the uplift displacement of the tank computed by the explicit finite element analysis reveals that the unanchored tank uplifts during the earthquake and its uplift displacement is more than the length of the pulling out of the anchor bolts found by the reconnaissance. This implicitly corroborates applicability of the explicit finite element analysis to analyzing the tank rocking behavior. In addition to that, the uplift displacement of the unanchored tank was estimated by some calculation methods available to date and compared with that computed by the explicit finite element analysis. Comparison reveals that the calculation methods used herein may likely overestimate the uplift displacement of the unanchored tank and need to improve their calculation accuracy.","PeriodicalId":180537,"journal":{"name":"Volume 8: Seismic Engineering","volume":"258 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134534910","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