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 Volume 1, Issue 1, Jan 2013
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Volume 1, Issue 2, February 2013


International Journal of Advance Research in Civil Engineering (IJOARCE)
 
 

Development of a Framework for Implementing Safety on Construction Sites[ ]


Safety management on construction sites had always been a major issue in the construction industry of Pakistan. The safety conditions on construction sites vary depending upon the nature of work and management commitment towards implementing safety on construction projects. There was no requirement for implementing safety management system from the government in the country. Construction companies were lacking a framework to follow for implementing safety on construction projects. The safety framework can help construction professionals to implement and improve construction safety practices on their project sites. This study presents the development of a framework for implementing safety on construction sites. Extensive literature review was carried out to design a suitable safety framework. Questionnaires items were adopted from previous studies and modified through pilot survey for collecting data from construction project. In addition to questionnaire survey, ten safety management interviews were conducted. These interviews were conducted from the representatives of contractors to obtain insights about the safety management practices in the construction industry of Pakistan. Safety management survey was conducted on seventy construction sites in different cities of Pakistan with the help of an instrument covering seven aspects of construction safety management, which are health and safety policy, safety organization, safety training, safety inspections, safety promotion, personal protection program, and documentation and accident prevention. The collected data was analyzed by using software SPSS 17. The results reveal that top management of construction companies needs to show commitment for developing and implementing safety management systems to improve safety conditions on construction sites. Results emphasize the requirement of competent staff which need to be appointed to implement safety on construction sites. Interviewees agreed that at the government level, it was imperative to establish a government agency to supervise and control the implementation of safety on construction sites in the construction industry. Finally, a safety framework was presented which the companies can adopt and embrace. The findings of this research will help Pakistani construction companies to improve safety on construction sites.

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Application of Hyperspectral Remote Sensing in Target Detection and Mapping using FieldSpec ASD in Udaygiri (M.P.)[ ]


This work deals with the detection of minerals using hyperspectral images. Hyperspectral imagery (HSI) for target detection has continually evolved to provide improved mineral detection result for research purpose. To get the complete result by hyperspectral data we must have apply following steps that is software based and the ground survey we can get a better result where the hyperspectral sensors are very useful to collect the field spectra and it processed in software. FLAASH is one of the best atmospheric correction techniques that will use in this research. FLAASH determines the atmospheric compensation parameters directly from the information contained within the scene using the observed pixel spectra. This method assumes that the average reflectance of a collection of diverse material spectra, such as the end member spectra in a scene, is effectively scene-independent. This enables the retrieval of reasonably accurate reflectance spectra, even with radiometrically uncalibrated data. This thesis will establish a strong theoretical foundation, describing the necessary preprocessing of hyperspectral imagery, deriving the Spectral Angle Mapper classification and ASD files those taken by SpectroRadioMeter. ENVI 4.7 shall used for the analysis of target. This thesis will establish a strong theoretical foundation, describing the necessary preprocessing of hyperspectral imagery, deriving the Atmospheric Corrections, Classification, and Target Detection.

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A Comparison Of Five Potential Evapo-transpiration Methods In The Tropical And Sub-tropical Monsoon Region In Bangladesh[ ]


In the field of climatology, hydrology as well as agriculture, PET which is formally named as potential evapo-transpiration has been an important variable influencing them as a vital index. Estimation of the PET properly has always been an esteemed effort because with the change of various environmental factors it always varies inconsistently. Consequently, the proper measurement of this index is really fundamental because of its influence on different environmental models. An effort concerned with the comparison of five most commonly used empirical estimation methods of PET has been made in this study in some tropical as well as sub tropical regions in Bangladesh. Atrociously but virtually, appreciable deviations and inconsistency has been noticed form the comparison of different methods. Different parameters such as mean temperature, daylight hours, saturation vapor pressure, temperature range, extra-terrestrial radiation, solar shortwave radiation, mean monthly sunshine hours, possible maximum sunshine hours, net radiation and ground heat flux has been correlated for the estimation of PET in these five methods. Priestly-Taylor method is suitable for cold region whereas solar radiation method, net radiation method and Preistley-Taylor method are radiation based method and Hargreaves method is temperature based method which is more suitable in warmer climate. To recapitulate in short, results of the study are expected to be useful for those involved in agricultural activities like optimum yield of different crops in different monsoons of a year and in different climatic conditions in Bangladesh.

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Ultimate load capacity[ ]


The axial compressive capacity of concrete encased steel columns due to different load conditions (axial compression through the core and whole cross-section) were numerically investigated to illustrate the effect of encasement of bare steel with concrete. The models were analyzed using finite element simulations and the obtained results were compared with laboratories test results conducted by other researchers. The finite element package LUSAS 14 is utilized in order to 3D non-linear analysis of models for investigating the ultimate load behavior and ultimate load-carrying capacity of the columns. In this study, a number of columns were simulated as a verification study and the finite element results showed very good agreement with the corresponding experiments. Convergence study has also been carried out for all specimens and the optimum size of the mesh which obtained by convergence is used for achieving accurate result. Moreover, initial imperfection was considered in the geometry of the model and the effects of parameters such as the length of composite columns and loading conditions on the ultimate load capacity have been examined. It was concluded that encasing has significant influence on the behavior and strength of columns. Furthermore, the effect of encasement on ultimate load decreases by increasing the slenderness of the columns. The finite element models developed in this study were capable to simulate the full behavioral histories of a variety of composite columns tested by various loading conditions with very good accuracy.

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