A. Baines, Phoebe Watson, L. Cunningham, B. Rogers, Jimmy Murphy, Susana Lizondo
Violent wave breaking at seawalls can produce significant landward pressure fields with ability to damage adjacent on-shore structures. To date quantification of these pressure fields is little und...
{"title":"Modelling shore-side pressure distributions from violent wave breaking at a seawall","authors":"A. Baines, Phoebe Watson, L. Cunningham, B. Rogers, Jimmy Murphy, Susana Lizondo","doi":"10.1680/JENCM.19.00007","DOIUrl":"https://doi.org/10.1680/JENCM.19.00007","url":null,"abstract":"Violent wave breaking at seawalls can produce significant landward pressure fields with ability to damage adjacent on-shore structures. To date quantification of these pressure fields is little und...","PeriodicalId":54061,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Engineering and Computational Mechanics","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2019-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79634691","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}
In this paper, the sliding mode control (SMC) method, one of the most efficient algorithms in the mitigation of excessive vibrations, was designed to reduce the dynamic responses of dynamical syste...
本文设计滑模控制(SMC)方法来减小动力系统的动态响应，这是一种最有效的减振算法之一。
{"title":"Sliding mode control of linear structures and a Duffing system using active tendons","authors":"R. Mahmoudi, H. Ghaffarzadeh, E. Ahani, J. Katebi","doi":"10.1680/JENCM.18.00033","DOIUrl":"https://doi.org/10.1680/JENCM.18.00033","url":null,"abstract":"In this paper, the sliding mode control (SMC) method, one of the most efficient algorithms in the mitigation of excessive vibrations, was designed to reduce the dynamic responses of dynamical syste...","PeriodicalId":54061,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Engineering and Computational Mechanics","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2019-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82946723","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}
There is no reason why concrete elements should be prismatic. Concrete is mouldable and can be cast in efficient forms which follow the stresses varying along the length of a concrete element. One ...
{"title":"Form-finding approach for flexibly formed concrete elements","authors":"Kaloyana Kostova, T. Ibell, A. Darby, M. Evernden","doi":"10.1680/JENCM.19.00005","DOIUrl":"https://doi.org/10.1680/JENCM.19.00005","url":null,"abstract":"There is no reason why concrete elements should be prismatic. Concrete is mouldable and can be cast in efficient forms which follow the stresses varying along the length of a concrete element. One ...","PeriodicalId":54061,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Engineering and Computational Mechanics","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81530976","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}
The study addresses the problem of designing slabs with variable stiffness to meet such requirements as reducing material consumption, ensuring reliability, durability and cost-effectiveness. The p...
该研究解决了设计变刚度板的问题，以满足诸如减少材料消耗、确保可靠性、耐久性和成本效益等要求。p…
{"title":"Foundation slabs bending model with variable stiffness ratio rested on elastic foundation","authors":"N. N. Nekrasova, Lyudmila V. Akchurina","doi":"10.1680/JENCM.18.00002","DOIUrl":"https://doi.org/10.1680/JENCM.18.00002","url":null,"abstract":"The study addresses the problem of designing slabs with variable stiffness to meet such requirements as reducing material consumption, ensuring reliability, durability and cost-effectiveness. The p...","PeriodicalId":54061,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Engineering and Computational Mechanics","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90346694","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}
Accidental and deliberate explosions stemming from catastrophic events in the petroleum industry, incidents during complex manufacturing processes, mishandling or failure of domestic gas appliances...
由石油工业灾难性事件引起的意外和故意爆炸，复杂制造过程中的事故，家用燃气器具的操作不当或故障……
{"title":"Pressure−impulse diagram method – a fundamental review","authors":"L. Chernin, Margi Vilnay, I. Shufrin, D. Cotsovos","doi":"10.1680/JENCM.17.00017","DOIUrl":"https://doi.org/10.1680/JENCM.17.00017","url":null,"abstract":"Accidental and deliberate explosions stemming from catastrophic events in the petroleum industry, incidents during complex manufacturing processes, mishandling or failure of domestic gas appliances...","PeriodicalId":54061,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Engineering and Computational Mechanics","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83450197","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}
Margi Vilnay, Valdemaras Sivickij, Frazer Watters, Cornelia Doerich-Stavridis, L. Chernin
Fixed offshore jackets are the most commonly adopted rigs for exploration of offshore oil and gas resources. The present paper focuses on the modelling of a 4-legged X-braced jacket type platform u...
{"title":"Fidelity of computational modelling of offshore jacket platforms","authors":"Margi Vilnay, Valdemaras Sivickij, Frazer Watters, Cornelia Doerich-Stavridis, L. Chernin","doi":"10.1680/JENCM.19.00004","DOIUrl":"https://doi.org/10.1680/JENCM.19.00004","url":null,"abstract":"Fixed offshore jackets are the most commonly adopted rigs for exploration of offshore oil and gas resources. The present paper focuses on the modelling of a 4-legged X-braced jacket type platform u...","PeriodicalId":54061,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Engineering and Computational Mechanics","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77828031","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}
Generating and absorbing random waves in numerical models is a challenging problem, in particular when meaningful wave statistics should be generated to meet design sea state requirements. The methodology presented herein allows for the generation of random wave fields (free surface elevation and velocities) to be reconstructed in time and in space by using window processing from a reference time series.
{"title":"Fast random wave generation in numerical tanks","authors":"A. Dimakopoulos, Tristan de Lataillade, C. Kees","doi":"10.1680/JENCM.17.00016","DOIUrl":"https://doi.org/10.1680/JENCM.17.00016","url":null,"abstract":"Generating and absorbing random waves in numerical models is a challenging problem, in particular when meaningful wave statistics should be generated to meet design sea state requirements. The methodology presented herein allows for the generation of random wave fields (free surface elevation and velocities) to be reconstructed in time and in space by using window processing from a reference time series.","PeriodicalId":54061,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Engineering and Computational Mechanics","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2019-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90410073","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}
Buildings or fence-like structures are frequently modelled as cuboids in simulations of environmental assessments. Understanding flows around and downwind of typical isolated buildings, in the form...
在环境评估模拟中，建筑物或栅栏状结构经常被建模为长方体。了解典型孤立建筑周围和下风的流动，以形式…
{"title":"Downwind flow behaviours of cuboid-shaped obstacles: modelling and experiments","authors":"Karl An, J. Hunt, J. Fung","doi":"10.1680/JENCM.18.00024","DOIUrl":"https://doi.org/10.1680/JENCM.18.00024","url":null,"abstract":"Buildings or fence-like structures are frequently modelled as cuboids in simulations of environmental assessments. Understanding flows around and downwind of typical isolated buildings, in the form...","PeriodicalId":54061,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Engineering and Computational Mechanics","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2019-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77841884","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}
The design of tuned-mass dampers is based on minimising lateral displacement (displacement-based design) and then maximising performance (reliability-based design). The research study reports that ...
{"title":"Reliability-based design of tuned-mass dampers with soil−structure interaction","authors":"S. D. O. Mohammadi, A. Gholizad","doi":"10.1680/JENCM.17.00018","DOIUrl":"https://doi.org/10.1680/JENCM.17.00018","url":null,"abstract":"The design of tuned-mass dampers is based on minimising lateral displacement (displacement-based design) and then maximising performance (reliability-based design). The research study reports that ...","PeriodicalId":54061,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Engineering and Computational Mechanics","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2019-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74955659","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}
Pub Date : 2019-02-01DOI: 10.1680/jwarm.2019.172.1.37
I. Eames
The dynamics of waves and their interaction with a beach depends on whether the leading wave component is elevated or depressed. These differences are explained in this paper using a hydraulic model and the principle of conservation of impulse. Laboratory experiments of depression waves, conducted using a novel wavemaker, are compared with model predictions. Over a sloping beach, these waves have a nearly constant V-shaped depression trailed by a growing Λ-shaped positive wave. The shoreline recedes over a significant distance, caused by shoreward water being drawn into the V-shaped depression. When the trailing Λ-shaped positive wave breaks, an energetic hydraulic bore develops and moves up the beach. The hydraulic model leads to general formulae for wave slopes, draw-down and run-up. The run-up of negative waves can be larger or smaller than that of positive waves, depending on the wave amplitude and beach parameters. The predictions are compared with results from photographs of depression waves taken during the 2004 Sumatra tsunami. Similar phenomena occurred in Japan in 2011. By incorporating up/down amplitude data in new tsunami warning systems, the properties of tsunamis on beaches could be estimated in real time using the present work, thus improving emergency response strategies. In future, the damage associated with tsunami waves, depending on coastal parameters, could increase with rising sea levels, erosion and destruction of coral reefs, and the loss of Arctic sea-ice.
{"title":"Award-winning papers in 2019","authors":"I. Eames","doi":"10.1680/jwarm.2019.172.1.37","DOIUrl":"https://doi.org/10.1680/jwarm.2019.172.1.37","url":null,"abstract":"The dynamics of waves and their interaction with a beach depends on whether the leading wave component is elevated or depressed. These differences are explained in this paper using a hydraulic model and the principle of conservation of impulse. Laboratory experiments of depression waves, conducted using a novel wavemaker, are compared with model predictions. Over a sloping beach, these waves have a nearly constant V-shaped depression trailed by a growing Λ-shaped positive wave. The shoreline recedes over a significant distance, caused by shoreward water being drawn into the V-shaped depression. When the trailing Λ-shaped positive wave breaks, an energetic hydraulic bore develops and moves up the beach. The hydraulic model leads to general formulae for wave slopes, draw-down and run-up. The run-up of negative waves can be larger or smaller than that of positive waves, depending on the wave amplitude and beach parameters. The predictions are compared with results from photographs of depression waves taken during the 2004 Sumatra tsunami. Similar phenomena occurred in Japan in 2011. By incorporating up/down amplitude data in new tsunami warning systems, the properties of tsunamis on beaches could be estimated in real time using the present work, thus improving emergency response strategies. In future, the damage associated with tsunami waves, depending on coastal parameters, could increase with rising sea levels, erosion and destruction of coral reefs, and the loss of Arctic sea-ice.","PeriodicalId":54061,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Engineering and Computational Mechanics","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90501894","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}
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