Eighth International Conference On Advances in Civil Structural and Mechanical Engineering ACSM 2018最新文献

{"title":"An experimental studies on high seismic performance shear walls","authors":"W. Liao","doi":"10.15224/978-1-63248-154-2-09","DOIUrl":"https://doi.org/10.15224/978-1-63248-154-2-09","url":null,"abstract":"Past RC wall panel tests of reinforced concrete membrane elements under reversed cyclic loading have much greater ductility when steel bars are provided in the direction of principal tensile stress. In order to improve the ductility of shear walls under earthquake loading, high seismic performance shear walls have been proposed to have steel bars in the same direction as the principal direction of applied stresses in the critical regions of shear walls. This paper presents the test results of two shear walls under shake table excitation and two shear walls under reversed cyclic loading. In the specimens under shake table tests, steel bars were provided at angles of either 90 degrees or 45 degrees to the horizontal. In the reversed cyclic tests, one-half of the steel bars were placed at an angle of 45 degrees to the horizontal in the low-rise shear wall and at an angle of 65 degrees to the horizontal in the bottom portion of the mid-rise shear wall. Based on the experimental results, the tested shear walls with reinforcement oriented close to the principal tensile direction of applied stresses have greater ductility than that of the conventional shear wall. Keywords—shear wall, reinforced concrete, ductility, cyclic loading, shake table","PeriodicalId":126283,"journal":{"name":"Eighth International Conference On Advances in Civil Structural and Mechanical Engineering ACSM 2018","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133199869","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}

{"title":"Investigating the Risk Preventive and Mitigative Methods used in Gauteng South Africa Evidence from Contractors","authors":"N. Ansary","doi":"10.15224/978-1-63248-154-2-28","DOIUrl":"https://doi.org/10.15224/978-1-63248-154-2-28","url":null,"abstract":"—This study sought to investigate the effectiveness of risk management methods used in construction projects according to contractor’s perspective. Literature search and questionnaire surveys were carried out, and a total of thirteen risk management actions were identified which were further categorized into two groups of preventive and mitigative actions. Research findings identified subjective judgment to produce a proper programme and production of a proper schedule as mostly used actions to manage risks in the first group. Furthermore, close supervision, increase the working hours and coordinate closely with subcontractors were the most used actions to manage risks in the latter group. The results of this study would considerably boost the understanding of risk management actions and also assist contractors in handling various risks faced by the industry.","PeriodicalId":126283,"journal":{"name":"Eighth International Conference On Advances in Civil Structural and Mechanical Engineering ACSM 2018","volume":"216 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130141560","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}

{"title":"Advanced method for station point control accuracy to monitor the behaviour in service stage of civil engineering structures using geodetic satellite technology","authors":"D. Morariu","doi":"10.15224/978-1-63248-154-2-12","DOIUrl":"https://doi.org/10.15224/978-1-63248-154-2-12","url":null,"abstract":"— The monitoring of important engineering buildings is mandatory and necessary especially in crowded urban areas. Achieving a stable and optimal monitoring network leads to a more effective time monitoring of objectives through the use of satellite methods. Satellite geodetic technology along with emerging technologies is a modern way to get data on civil buildings monitored with reasonable accuracy. Thus, the fast evolution of communication technologies allowed and developed several satellite constellations throughout the Globe at the same time, depending on the needs and economic power of owners. In the present scientific paper, we will describe an analysis of the accuracy of data obtained with the use of satellite technology for monitoring the behavior of an engineering building using Romanian Positioning System (ROMPOS) based on satellite systems such as: Global Navigation Satellite System (GNSS), Russian GLONASS and European Galileo, but also on GNSS permanent stations, obtaining real-time data in the ETRS89 European Coordinate System. The aim of this paper is to compare the use of the Global Positioning System (GPS) and GLObalnaya both individually and simultaneously to determine the control points of the monitoring network. The precision of station points determining for an engineering structure is important, and in the case of the use of satellite technology it can be influenced by multiple factors that will be presented in the paper. The accuracy of the station coordinates of the selected target is given by integrating both satellite constellations by increasing the number of satellites used, obtaining a more accurate position with greater visibility to them. It is an engineering structure, viaduct type, over 50 years old, with a length of 1.3 kilometers. The objective is in the North-West part of Galati, Romania and represents an important access road connecting Galati city to the platform of ArcelorMittal steel company requiring a regular observationeven a permanent monitoring.","PeriodicalId":126283,"journal":{"name":"Eighth International Conference On Advances in Civil Structural and Mechanical Engineering ACSM 2018","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121728869","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}

{"title":"Discharge Modeling in Smooth and Rough Compound Channels Using Genetic Programming","authors":"Alok Adhikari","doi":"10.15224/978-1-63248-154-2-10","DOIUrl":"https://doi.org/10.15224/978-1-63248-154-2-10","url":null,"abstract":"— Discharge results observed from the experimental channels for smooth and rough surfaces, along with data from a compound river channel are used in the Genetic Programming. Model equations are derived for prediction of discharge in compound channel for various types of channel surfaces. Five hydraulic parameters are used for developing the model equations. Models derived are tested and compared with other soft computing techniques. Evaluations of all the approaches are carried out using five performance parameters. Finally, the effect of parameters responsible for the flow behavior is shown through sensitivity analysis. GP is found to give the most promising results. This work aims to benefit the researchers engaged in modeling of discharge using machine learning techniques.","PeriodicalId":126283,"journal":{"name":"Eighth International Conference On Advances in Civil Structural and Mechanical Engineering ACSM 2018","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123811289","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}

{"title":"Dam Breach Parameters and its Effects on Propagation of Flood Wave in the Downstream","authors":"K. C","doi":"10.15224/978-1-63248-154-2-08","DOIUrl":"https://doi.org/10.15224/978-1-63248-154-2-08","url":null,"abstract":"","PeriodicalId":126283,"journal":{"name":"Eighth International Conference On Advances in Civil Structural and Mechanical Engineering ACSM 2018","volume":"344 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115159374","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}

{"title":"Causes of Filtration the Water in Roller Compacted Concrete Dams RCC","authors":"J. O","doi":"10.15224/978-1-63248-154-2-27","DOIUrl":"https://doi.org/10.15224/978-1-63248-154-2-27","url":null,"abstract":"Roller compacted concrete (RCC) dam construction involves placing by compaction vibratory of concrete in successive layers of 30 to 45 cm thick. The RCC is a permeable material, especially on the surfaces of contact between layers, which are flat or together of potential weakness for the material. This constructive technology generates two areas of transition with RCC body dams it. A with the face of mass vivrate concrete (MVC) and the other with the rock of the footboard. The impermeability of the dam must rely to a thin layer of MVC, of the order of 0, 70m to 1, 30m thick, which forms a waterproof wall in contact with the water of the reservoir. It is complemented by joint water stop placed in the joints between blocks. A crack in the wall or placement joints defects water stop will allow the entrance of water to the body of the dam. If the constructive joints and transition areas were not resolved correctly, they will operate as preferential pathways of spatially connected at all the dam water circulation, so that you emerge in the face of water down a place away from the entry point. Therefore it is difficult to diagnosis and consequently the project. The water through the body of the dam can cause progressive deterioration of concrete due to leaching of calcium hydroxide by what while filtration volumes were eligible, at the time probably undertake the security of the dam. This paper presents a case and the reasons which gave rise to the waterproofing failures, processes observed deterioration and constructive recommendations to prevent the occurrence of such failures.","PeriodicalId":126283,"journal":{"name":"Eighth International Conference On Advances in Civil Structural and Mechanical Engineering ACSM 2018","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123647163","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}

{"title":"Behavior of Screen Grid Insulated Concrete Forms ICF Reinforced Concrete Walls Under Seismic Loads","authors":"Y. H.","doi":"10.15224/978-1-63248-154-2-25","DOIUrl":"https://doi.org/10.15224/978-1-63248-154-2-25","url":null,"abstract":"The current research addresses Screen Grid Insulated Concrete Forms (ICF) Reinforced Concrete walls, an innovative system that combines structural strength and sustainability. The system however is still developing with relatively few researches and yet not acknowledged by several design codes. The aim of this work is to further evaluate the structural behavior of SGICF walls. Results of this research may lead to and performed. The test program consisted of six walls that were divided into two sets. The first set was tested under combined axial and lateral monotonic load and the second set was tested under combined axial and cyclic lateral load. Each set consisted of three walls; a wall without openings, one with a window opening and the other with a door opening. The configuration and reinforcement of the walls in the two sets were similar. This part of the research aims at understanding the effect of seismic loading on SGICF walls. Accordingly, a cyclic loading experimental program was performed to simulate earthquake action. Results of the cyclic loading test program indicated the energy dissipation capacity of the tested walls as well as their stiffness degradation under this type of loading. The aim of the monotonic loading experimental program was to act as control specimens to evaluate the effect of cyclic loading. The test showed the cracking pattern, lateral load resisting capacity, energy dissipation and stiffness degradation of the different walls under the two types of loading. These results may be very useful for the design of SGICF walls under seismic loads. Keywords—Screen Grid ICF, In-plane monotonic loading, In-plane cyclic loading, Grid size, Presence of openings.","PeriodicalId":126283,"journal":{"name":"Eighth International Conference On Advances in Civil Structural and Mechanical Engineering ACSM 2018","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127223468","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}

{"title":"Stiffness Coefficients for Caisson Foundations Supporting Offshore Wind Energy Converters","authors":"A. Mohammed","doi":"10.15224/978-1-63248-154-2-11","DOIUrl":"https://doi.org/10.15224/978-1-63248-154-2-11","url":null,"abstract":"— A wide range of novel Offshore applications are emerging in the energy sector. Actually, Offshore Wind Energy is one of the most attractive sources of renewable energy. During the last decade, Offshore Wind Turbines were extensive application throughout the worldwide. However, the efficiency of Offshore Wind Turbines especially foundations in one of the currently challenges. In the past, suction caissons have been widely used in oil and gas structures. Recently it is attempted to be used as support structures for Offshore Wind Turbines. Similarly to conventional monopiles, suction caissons supporting Wind Turbines experience lateral displacement mainly due to wind and waves, though studies show that caissons have more long term performance against loading. This paper aims for highlighting the stiffness behavior of caissons in the elastic domain supporting Wind Turbines using the Fourier Series Aided Finite Element Method (FSAFEM) through sensitivity analysis considering the geometry of the caisson and variation of the soil stiffness with depth.","PeriodicalId":126283,"journal":{"name":"Eighth International Conference On Advances in Civil Structural and Mechanical Engineering ACSM 2018","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116061346","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}

{"title":"Analysis Performance Cost and Implementation with Earned Value Method","authors":"H. Calvin","doi":"10.15224/978-1-63248-154-2-26","DOIUrl":"https://doi.org/10.15224/978-1-63248-154-2-26","url":null,"abstract":"Earned Value Method is a method developed to determine the progress of the project based on the progress that has been achieved. This method will provide very useful information when applied to evaluate project progress in order to identify potential slippage and use of budget overruns. The concept of an earned value has three main components: the budget cost, the actual cost, and a value derived from the cost that has been issued or called the earned value. The research was carried out on the project of Faculty of Engineering Development of Hasanuddin University in Makassar, South Sulawesi. The research method is an intrusive analysis by analyzing project performance after the 13 week. The results showed that the application of the earned value method showed that the project time performance from the first week to the 13th week experienced several deviations, ie at the 4, 8 and 13 weeks. So the project has decreased time performance at a cost that is less than the budget.","PeriodicalId":126283,"journal":{"name":"Eighth International Conference On Advances in Civil Structural and Mechanical Engineering ACSM 2018","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126283174","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}

{"title":"CONTROL SYSTEM STRATEGIES FOR VIBRATION ASSISTED GRINDING MACHINE","authors":"H. Ewad","doi":"10.15224/978-1-63248-154-2-30","DOIUrl":"https://doi.org/10.15224/978-1-63248-154-2-30","url":null,"abstract":"— Grinding is usually the last finishing operation to be completed on the work piece and hence any deviations in quality such as geometrical errors and surface finish cannot be passed onto the next operation. Grinding is classified as a machining process that removes material from the work piece using similar principles to that of milling or turning. However, instead of having the one large cutting edge, there are numerous small cutting edges by way of grits on the grinding wheel surface, with all of them working together at extremely high speeds. One of the main problems in grinding is the growing vibration (Chatter) between wheel and work piece during the process. Many studies and tests have been made in order to detect and avoid this dynamic phenomenon which affects a number of parameters including wheel wear and work piece quality. However, a possible method to prevent this type of chatter is to apply a periodic disengagement of the wheel from the work piece and periodic variation of the work speed. This paper present a review of vibration assisted grinding. A development a controller for single axis vibration in grinding technology is reveal. A system calibration and experiment result including the forces, Power, grinding Coefficient, specific removal arte and specific energy software based control system is illustrated together with some results.","PeriodicalId":126283,"journal":{"name":"Eighth International Conference On Advances in Civil Structural and Mechanical Engineering ACSM 2018","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117005664","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}