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Articles 1 - 5 of 5
Full-Text Articles in Civil Engineering
A Three-Dimensional Hydro-Environmental Model Of Dublin Bay, Zeinab Bedri, Michael Buen, Aodh Dowley
A Three-Dimensional Hydro-Environmental Model Of Dublin Bay, Zeinab Bedri, Michael Buen, Aodh Dowley
Articles
This paper compares a 3-dimensional hydro-ecological model with a 2-dimensional model simulating the distribution and fate of Escherichia Coli (E.Coli) discharges from a sewage treatment plant discharging into Dublin Bay, Ireland. Before being discharged, the effluent from the sewage treatment plant is mixed with cooling water from a thermal generation plant resulting in a warm buoyant sewage plume that can be 7 − 9oC higher than the ambient water in the Bay. The mixing of the stratified plume is complicated by the tidal currents which transport the plume into and out of the estuary. These processes have a direct impact …
Comparative Field Performance Study Of Flat Plate And Heat Pipe Evacuated Tube Collectors (Etcs) For Domestic Water Heating Systems In A Temperate Climate, Lacour Ayompe, Aidan Duffy, Sarah Mccormack, Michael Conlon, Mick Mckeever
Comparative Field Performance Study Of Flat Plate And Heat Pipe Evacuated Tube Collectors (Etcs) For Domestic Water Heating Systems In A Temperate Climate, Lacour Ayompe, Aidan Duffy, Sarah Mccormack, Michael Conlon, Mick Mckeever
Articles
This paper presents a year round energy performance monitoring results of two solar water heaters with 4 m2 flat plate and 3 m2 heat pipe evacuated tube collectors (ETCs) operating under the same weather conditions in Dublin, Ireland. The energy performance of the two systems was compared on daily, monthly and yearly basis. Results obtained showed that for an annual total in-plane solar insolation of 1,087 kWh/m2, a total of 1,984 kWh and 2,056 kWh of heat energy were collected by the 4 m2 FPC and 3 m2 ETC systems respectively. Over the year, …
Modeling Extreme Traffic Loading On Bridges Using Kernel Density Estimators, Cathal Leahy, Eugene J. Obrien, Bernard Enright
Modeling Extreme Traffic Loading On Bridges Using Kernel Density Estimators, Cathal Leahy, Eugene J. Obrien, Bernard Enright
Conference papers
Kernel density estimators are a non-parametric method of estimating the probability density function of sample data. In this paper, the method is applied to find characteristic maximum daily truck weights on highway bridges. The results are then compared with the conventional approach
Modelling Of Highway Bridge Traffic Loading: Some Recent Advances, Bernard Enright, Colin C. Caprani, Eugene J. Obrien
Modelling Of Highway Bridge Traffic Loading: Some Recent Advances, Bernard Enright, Colin C. Caprani, Eugene J. Obrien
Conference papers
The accurate estimation of site-specific lifetime extreme traffic load effects is an important element in the cost-effective assessment of bridges. In recent years, the improved quality and increasing use of weigh-in-motion technology has meant that better quality and larger databases of vehicle weights are now available. This has enabled measurements of the regular occurrence of extremely heavy vehicles, with weights in excess of 100 t. The collected measurements have been used as the basis for building and calibrating a Monte Carlo simulation model for bridge loading. The computer programs written to implement this model generate simulated traffic in two lanes …
Modeling Same-Direction Two-Lane Traffic For Bridge Loading, Eugene J. Obrien, Bernard Enright
Modeling Same-Direction Two-Lane Traffic For Bridge Loading, Eugene J. Obrien, Bernard Enright
Articles
Many highway bridges carry traffic in two same-direction lanes, and modeling the traffic loading on such bridges has been the subject of numerous studies. Different assumptions have been used to model multiple-presence loading events, particularly those featuring one truck in each lane. Using a database of weigh-in-motion measurements collected at two European sites for over 1 million trucks, this paper examines the relationships between adjacent vehicles in both lanes in terms of vehicle weights, speeds and inter-vehicle gaps. It is shown that there are various patterns of correlation, some of which are significant for bridge loading. A novel approach to …