Journal of Earthquake and Tsunami最新文献_第5页

Development of Near-Field Earthquake Loading Protocols for the Steel Moment Connections in Iran 伊朗钢弯矩连接近场地震荷载协议的发展

IF 1.5 4区工程技术

Journal of Earthquake and Tsunami Pub Date : 2022-11-11 DOI: 10.1142/s1793431123500057

Elyas Alizehi, M. Ghassemieh, S. R. Mirghaderi, Mahmoud Ali Ali

{"title":"Development of Near-Field Earthquake Loading Protocols for the Steel Moment Connections in Iran","authors":"Elyas Alizehi, M. Ghassemieh, S. R. Mirghaderi, Mahmoud Ali Ali","doi":"10.1142/s1793431123500057","DOIUrl":"https://doi.org/10.1142/s1793431123500057","url":null,"abstract":"Steel moment frame buildings are widely used in Iran and around the world. The observations from major earthquakes underscored the importance of the beam-to-column connections in seismic force-resisting systems and their influence on such building’s performance. Since the most catastrophic earthquakes that occurred in Iran contained the characteristics of near-field earthquakes, hence understanding the behavior of these connections under such earthquakes is needed. This study proposed loading protocols for special steel moment-resisting frame systems under near-field earthquakes in Iran. Each of them had 23 damage half-cycles with a maximum inter-story drift of 0.065 radians. The proposed loading protocols were compared numerically to each other. The most influential one was chosen as the main loading protocol since it has the most destructive effect on the connection. The main loading protocol showed a faster rate of increase in the plastic strain and imposed the highest amount of dissipated energy at a former loading stage compared to other near-field earthquake loading protocols related to other countries such as SAC and Fang et al.","PeriodicalId":50213,"journal":{"name":"Journal of Earthquake and Tsunami","volume":"31 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77265334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Quantitative Modeling of Pulse-Like Ground Motions Using Imperialist Competitive Optimization Algorithm 使用帝国主义竞争优化算法的脉冲式地面运动定量建模

IF 1.5 4区工程技术

Journal of Earthquake and Tsunami Pub Date : 2022-11-11 DOI: 10.1142/s1793431123500033

Z. Minaei, S. R. H. Vaez, E. Dehghani, Elham Ezzati

{"title":"Quantitative Modeling of Pulse-Like Ground Motions Using Imperialist Competitive Optimization Algorithm","authors":"Z. Minaei, S. R. H. Vaez, E. Dehghani, Elham Ezzati","doi":"10.1142/s1793431123500033","DOIUrl":"https://doi.org/10.1142/s1793431123500033","url":null,"abstract":"Increasing attention in quantitative and qualitative models has been paid to the dominant velocity pulse of the pulse-like ground motions. Manual trial and error approach for fitting of time history and response spectrum of the actual record and simulated pulse has been employed to obtain pulse parameters of these models. In this study, a mathematical model and the imperialist competitive algorithm (ICA) are used to overcome the limitations of the previous studies. For this purpose, an objective function is defined as the norm deviation of the time history and response spectrum of the actual record and simulated pulse. The proposed approach is capable of identifying and extracting the dominant pulse of any pulse-like record, and consists of 91 pulse-like records used in this study. In all of 91 records, the highest accordance with time history and elastic response spectrum of actual records and extracted pulses is achieved. As a case study, the extracted pulses of the 1999 Chi-Chi earthquake are used to generate artificial pulse-like records. The dynamic responses of the 3-story moment frame in SAC project subjected to generated records are investigated. The results show that the proposed approach can be used in parametric studies of pulse-like ground motions.","PeriodicalId":50213,"journal":{"name":"Journal of Earthquake and Tsunami","volume":"8 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91074537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Estimation and Application of Strength and Stiffness Reduction Factors of Liquefiable Soil 可液化土强度、刚度折减系数的估算及应用

IF 1.5 4区工程技术

Journal of Earthquake and Tsunami Pub Date : 2022-07-07 DOI: 10.1142/s1793431122500208

Jui-Ching Chou, Ming-Yen Chiang, Ciao-Rou Tang

引用次数: 0

Boulder Transportation on the Flat Bed by Dam Break 溃坝平坦河床上的巨石运输

IF 1.5 4区工程技术

Journal of Earthquake and Tsunami Pub Date : 2022-07-07 DOI: 10.1142/s1793431122410020

Jing-Hua Lin, Yi-Wei Chang, Guanging Chen

引用次数: 1

Friction tuned mass dampers in seismic-excited high-rise buildings with SSI effects: A reliability assessment 具有SSI效应的高层建筑摩擦调谐质量阻尼器的可靠性评估

IF 1.5 4区工程技术

Journal of Earthquake and Tsunami Pub Date : 2022-07-07 DOI: 10.1142/s1793431122500221

S. Etedali, M. Akbari, M. Seifi

引用次数: 3

Modeling of the Initial Stage of Wave Generation by a Suddenly Rising or Falling Seabed 海底突然上升或下降产生波浪的初始阶段的模拟

IF 1.5 4区工程技术

Journal of Earthquake and Tsunami Pub Date : 2022-07-07 DOI: 10.1142/s1793431122410056

Chih-Hua Chang

引用次数: 0

Influences of Wall Configurations on Earthquake Behavior of Cantilever Retaining Walls Considering Soil-Structure Interaction Effects 考虑土-结构相互作用的墙型对悬臂挡土墙地震性能的影响

IF 1.5 4区工程技术

Journal of Earthquake and Tsunami Pub Date : 2022-07-07 DOI: 10.1142/s179343112250021x

Kasif Furkan Ozturk, T. Cakir, O. Araz

引用次数: 2

Derivation, Validation, and Numerical Implementation of a Two-Dimensional Boulder Transport Formulation by Coastal Waves 推导，验证，和数值实现二维巨石传输公式的海岸波

IF 1.5 4区工程技术

Journal of Earthquake and Tsunami Pub Date : 2022-07-07 DOI: 10.1142/s179343112250018x

Masashi Watanabe, T. Yoshii, V. Roeber, K. Goto, F. Imamura

{"title":"Derivation, Validation, and Numerical Implementation of a Two-Dimensional Boulder Transport Formulation by Coastal Waves","authors":"Masashi Watanabe, T. Yoshii, V. Roeber, K. Goto, F. Imamura","doi":"10.1142/s179343112250018x","DOIUrl":"https://doi.org/10.1142/s179343112250018x","url":null,"abstract":"Numerical computations for boulder transport have become a state-of-the-art tool for hindcasting the hydraulic processes associated with past storm wave and tsunami events. Since most previously developed two-dimensional formulations cater to boulders with symmetric outlines, they can consequently reproduce the transport distance and the velocity of boulders of cubic shape or similar structured geometries reasonably well. However, the formulations exhibit limitations when applied to rectangular- and flat-shaped boulders. The presently available formulations have difficulties reproducing the variations of frictional drag force due to the changes of the boulders’ contact time with the ground. We have developed an extended boulder transport formulation and derived a new empirical roughness coefficient by considering the shape of boulders that accounts for the changes of the boulders’ contact time with the ground. In comparison to other existing transport formulations, the present method provides superior accuracy of block velocity and transport distance in most cases — especially for boulders of rectangular geometry. Even by neglecting the full three-dimensional processes, numerical computations extended with the proposed boulder transport formulation can help explaining historic wave regimes, which were responsible for the transport of a variety of coastal boulders reported around the world.","PeriodicalId":50213,"journal":{"name":"Journal of Earthquake and Tsunami","volume":"131 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2022-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86357173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 4

Study on Further Improvement of Anti-tsunami Ability of a New Type Bridge Pier 进一步提高新型桥墩抗海啸能力的研究

IF 1.5 4区工程技术

Journal of Earthquake and Tsunami Pub Date : 2022-06-30 DOI: 10.1142/s1793431122500063

Wanli Yang, Hailin Hou, Quanlong Zhu, Junling Liu, Fuhai Li, Lingyuan Zhou

{"title":"Study on Further Improvement of Anti-tsunami Ability of a New Type Bridge Pier","authors":"Wanli Yang, Hailin Hou, Quanlong Zhu, Junling Liu, Fuhai Li, Lingyuan Zhou","doi":"10.1142/s1793431122500063","DOIUrl":"https://doi.org/10.1142/s1793431122500063","url":null,"abstract":"Compared with circular, square and diamond piers, the N60 pier proposed in our previous study has been numerically proven to be effective in reducing tsunami force. The relatively stronger vortices behind the N60 pier are responsible for the not-small-enough tsunami force on the N60 pier. The asymmetry in shape makes the N60 pier fail to reduce flood force because flood propagates in the opposite direction of tsunami bore. A series of new type piers named <math altimg=\"eq-00001.gif\" display=\"inline\" overflow=\"scroll\"><mstyle><mtext mathvariant=\"normal\">N</mtext></mstyle><mi>α</mi><mo>−</mo><mi>β</mi></math> are proposed to further improve the anti-tsunami ability of the N60 by computational fluid dynamics (CFD) method among which the N60-60 pier is proven to be most effective in reducing tsunami force, and its tsunami force mitigation mechanism is analyzed numerically. Further, the physical experiments were conducted to validate the N60 pier and the new type pier N60-60. Results show that compared with circular, square and diamond piers, the N60 pier is indeed capable of reducing tsunami force, and compared with the N60 pier, the new type N60-60 pier is capable of further reducing tsunami force. The order of magnitudes of tsunami forces on piers is: N60-60 <math altimg=\"eq-00002.gif\" display=\"inline\" overflow=\"scroll\"><mo><</mo></math> N60 <math altimg=\"eq-00003.gif\" display=\"inline\" overflow=\"scroll\"><mo><</mo></math> circular <math altimg=\"eq-00004.gif\" display=\"inline\" overflow=\"scroll\"><mo><</mo></math> diamond <math altimg=\"eq-00005.gif\" display=\"inline\" overflow=\"scroll\"><mo><</mo></math> square.","PeriodicalId":50213,"journal":{"name":"Journal of Earthquake and Tsunami","volume":"67 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138543554","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Seismic Active Pressure on an Inclined Retaining Wall with Surcharge on a Submerged Backfill 埋地填土上加堆填土倾斜挡土墙的地震主动压力

IF 1.5 4区工程技术

Journal of Earthquake and Tsunami Pub Date : 2022-06-21 DOI: 10.1142/s1793431122500075

G. Srikar, S. Mittal

{"title":"Seismic Active Pressure on an Inclined Retaining Wall with Surcharge on a Submerged Backfill","authors":"G. Srikar, S. Mittal","doi":"10.1142/s1793431122500075","DOIUrl":"https://doi.org/10.1142/s1793431122500075","url":null,"abstract":"Seismic design of retaining wall supporting submerged retaining wall requires precise estimation of lateral earth pressure considering realistic parameters that constitute hydro-dynamic pressure, frequency inputs and other dynamic properties. The purpose of this study is to establish a closed-form solution for seismic lateral earth pressure acting on a retaining wall with submerged backfill with surcharge. The proposed method includes the dynamic nature by considering time-period, the frequency of the seismic wave, dynamic soil properties. Boundary conditions in the backfill are satisfied due to the propagation of the seismic wave. This study considers amplified seismic waves to estimate inertial forces due to critical soil mass and surcharge. The excess pore pressure generated during the seismic action is also considered in this study. The obtained formulation shows the significant effect of frequency content, damping resistance offered by backfill soil, amplification of seismic wave on seismic earth pressure. The seismic earth pressure obtained from this study is observed to be in a close agreement with centrifuge test results and analytical studies from the literature. This study definitely addresses the lateral pressure distribution on the retaining wall with backfill submergence and surcharge on the surface.","PeriodicalId":50213,"journal":{"name":"Journal of Earthquake and Tsunami","volume":"1 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2022-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88271460","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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