Engineer-Journal of the Institution of Engineers Sri Lanka最新文献_第7页

Organisational Factors Affecting the Productivity of Labour in Sri Lankan Building Construction Projects: Perspective of Engineers 斯里兰卡建筑工程中影响劳动生产率的组织因素:工程师的视角

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Engineer-Journal of the Institution of Engineers Sri Lanka Pub Date : 2022-11-08 DOI: 10.4038/engineer.v55i3.7525

M. Kesavan, P. Dissanayake, C. Pathirana, M. Deegahawature, K. D. Silva

引用次数: 0

Application of SWMM for Water Resources Management by Continuous Rainfall-Runoff Modelling in the Rural Watershed of Kalu River Basin of Sri Lanka SWMM在斯里兰卡Kalu河流域农村流域连续降雨径流模拟水资源管理中的应用

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Engineer-Journal of the Institution of Engineers Sri Lanka Pub Date : 2022-11-08 DOI: 10.4038/engineer.v55i3.7523

P. Thakuri, N. Wijesekera

引用次数: 1

Effect of Soil Types on Attenuation of Piled Induced Ground Vibration: Experimental and Numerical Study 土型对桩基振动衰减的影响:试验与数值研究

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Engineer-Journal of the Institution of Engineers Sri Lanka Pub Date : 2022-09-22 DOI: 10.4038/engineer.v55i2.7512

G. D. De Silva, K. M. G. C. J. Thilakasiri, S. Thoradeniya

引用次数: 0

Dynamic, Clay, Secondary Walling for Heat Reduction, in Tropical Indoors 动态，粘土，二次墙减少热量，在热带室内

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Engineer-Journal of the Institution of Engineers Sri Lanka Pub Date : 2022-09-22 DOI: 10.4038/engineer.v55i2.7511

M. Rajapaksha, P. D. Dharmaratne, R. Halwatura

引用次数: 1

Low-Cost Sequential Permeable Reactive Barrier (PRB) to Treat Groundwater Contaminated by Landfill-Leachate 低成本序贯渗透反应屏障(PRB)处理垃圾渗滤液污染地下水

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Engineer-Journal of the Institution of Engineers Sri Lanka Pub Date : 2022-09-22 DOI: 10.4038/engineer.v55i2.7506

W. Dayanthi, I. U. Nagasinghe, H. R. D. G. Shanthapriya, W. G. G. Danushka

引用次数: 0

Sustainable Biorefinery Approach for Cassava: A Review 木薯可持续生物炼制方法综述

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Engineer-Journal of the Institution of Engineers Sri Lanka Pub Date : 2022-09-22 DOI: 10.4038/engineer.v55i2.7510

N. M. Fernando, A. P. S. M. Amaraweera, O. H. P. Gunawardane, W. Wanninayaka, A. Manipura, W. A. Manamperi, C. Gunathilake, K. Kulathunga

引用次数: 0

Nature of Series-Arc Faults and Parameters Affecting the Risk of Domestic Electrical Fires 串联电弧故障的性质及参数对家用电气火灾危险性的影响

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Engineer-Journal of the Institution of Engineers Sri Lanka Pub Date : 2022-09-22 DOI: 10.4038/engineer.v55i2.7509

S. Somathilaka, N. T. Senarathna, H. E. Hewapathirana, W. M. K. S. Sumathipala, K.T.M.U. Hemapala, J. R. Lucas, P. D. de Silva

{"title":"Nature of Series-Arc Faults and Parameters Affecting the Risk of Domestic Electrical Fires","authors":"S. Somathilaka, N. T. Senarathna, H. E. Hewapathirana, W. M. K. S. Sumathipala, K.T.M.U. Hemapala, J. R. Lucas, P. D. de Silva","doi":"10.4038/engineer.v55i2.7509","DOIUrl":"https://doi.org/10.4038/engineer.v55i2.7509","url":null,"abstract":": The main cause of electrical fires, which is more severe in nature than non-electrical fires, is the series-arc fault. In this paper, the properties of series-arc faults are studied and the parameters affecting the risk of domestic electrical fires are analysed. In particular, a series-arc fault generator, made to align with the international standards, is used to study the characteristics of series-arc faults in a domestic electrical installation. The waveforms of common domestic equipment, in the absence of a fault and in the presence of a fault, are examined in detail. It is seen that arc current waveform can be identified as having a vertical edge appearing after the zero-crossing point. Further, the impact of series-arc faults on igniting a fire in domestic electrical installations are analysed using thermal imaging. Finally, ability of the most commonly used insulation materials which may aid the initiation of electrical fires due to the series-arc faults has thermally categorized. The study has shown that even a 2A arc current that is sustained for 2s can auto-ignite PVC, the most common insulation material in domestic installations.","PeriodicalId":42812,"journal":{"name":"Engineer-Journal of the Institution of Engineers Sri Lanka","volume":"38 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76141559","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

Influence of Slab System in Transfer of Lateral Loads to Reinforced Concrete Shear Wall 板系对钢筋混凝土剪力墙横向荷载传递的影响

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Engineer-Journal of the Institution of Engineers Sri Lanka Pub Date : 2022-09-22 DOI: 10.4038/engineer.v55i2.7513

K. Shanthika, J. Jayasinghe, C. Bandara

{"title":"Influence of Slab System in Transfer of Lateral Loads to Reinforced Concrete Shear Wall","authors":"K. Shanthika, J. Jayasinghe, C. Bandara","doi":"10.4038/engineer.v55i2.7513","DOIUrl":"https://doi.org/10.4038/engineer.v55i2.7513","url":null,"abstract":": The function of the slab system in a building is mainly to carry the gravity load. There are different types of slab systems which will be selected based on gravity loading, length of loading span and requirement of the architecture. The structural engineers mainly concentrate on vertical loads while designing the slab system, even though slab systems provide a significant amount of lateral stiffness to the structures to resist the lateral loads. In some designs, the lateral stiffness of the slab system is taken into account while others do not. In this study, the influence of slab systems in the transfer of the lateral load to the lateral load resistance system is assessed. The target building type is a wall-frame system. To find out the influence of the slab system on the lateral stiffness of the wall-frame system, rectangular shape regular type buildings with different stories (5, 10 and 15 stories) are selected. Here, three different types of slab systems, such as slab and beam, flat slab and flat slab with drop panel, are selected. Next, the effect of structural response is investigated for the structures under seismic and wind forces, with and without lateral slab stiffness. In this study, the response (displacement, inter-storey drift, frequency and base shear distribution) obtained through modal response spectrum analysis, non-linear time history analysis and static wind analysis are used for comparison. From the responses, it is clear that the lateral stiffness of the slab system has a significant influence on the serviceability limit state design of a structure, but not to the ultimate limit state design. Considering the lateral stiffness of slab, the deformation of a structure is controlled by (5-15) %, (15-35) % and (30-55) % for SB, FS and FSDP, respectively, based on the structural height.","PeriodicalId":42812,"journal":{"name":"Engineer-Journal of the Institution of Engineers Sri Lanka","volume":"8 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84073563","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

Depth-Area-Storage Capacity Relationships of Village Tanks 村庄储罐深度-面积-容量关系

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Engineer-Journal of the Institution of Engineers Sri Lanka Pub Date : 2022-09-22 DOI: 10.4038/engineer.v55i2.7508

K. Imbulana

{"title":"Depth-Area-Storage Capacity Relationships of Village Tanks","authors":"K. Imbulana","doi":"10.4038/engineer.v55i2.7508","DOIUrl":"https://doi.org/10.4038/engineer.v55i2.7508","url":null,"abstract":": Village Tanks in Sri Lanka have the potential to enhance climate resilience particularly through water management. The depth-area-capacity curves are very important for their improved management. However, many of these small reservoirs do not have such curves and it is difficult to develop them due to the reservoirs being numerous. Attempts to fit an equation to these curves have been carried out for a long time. This work analysed the data from approximately 150 Village Tanks, tested the validity of the equations currently used in Sri Lanka, and attempted to improve the presentation of depth-area-capacity relationships through modification to existing equations. The results show that a frequently used older equation is still valid with slight modifications. When the absolute values of the variables used in that equation are replaced by relative values, a linear relationship with a high correlation coefficient and small variation of the gradients of the linear plots was obtained. It was also found that a substantially accurate depth-area-capacity relationship could be derived with 4 to 5 measurements of depth and water surface area. The use of relative variables has several advantages including the ability to readily indicate the status of water availability in the Tank.","PeriodicalId":42812,"journal":{"name":"Engineer-Journal of the Institution of Engineers Sri Lanka","volume":"6 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85534758","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

Critical Factors Affecting Cost Overrun in Foreign Funded Road Construction Projects in Sri Lanka: A Case Study of Road Development Authority and Provincial Road Development Authorities 影响斯里兰卡外商投资公路建设项目成本超支的关键因素:以道路发展局和省级道路发展局为例

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Engineer-Journal of the Institution of Engineers Sri Lanka Pub Date : 2022-09-22 DOI: 10.4038/engineer.v55i2.7505

D. Dolage, O. M. C. Dasantha

引用次数: 0