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Full-Text Articles in Engineering
A Novel Concrete-Based Sensor For Detection Of Ice And Water On Roads And Bridges, Habib Tabatabai, Mohammed Aljuboori
A Novel Concrete-Based Sensor For Detection Of Ice And Water On Roads And Bridges, Habib Tabatabai, Mohammed Aljuboori
Civil and Environmental Engineering Faculty Articles
Hundreds of people are killed or injured annually in the United States in accidents related to ice formation on roadways and bridge decks. In this paper, a novel embedded sensor system is proposed for the detection of black ice as well as wet, dry and frozen pavement conditions on roads, runways, and bridges. The proposed sensor works by detecting changes in electrical resistance between two sets of stainless steel poles embedded in the concrete sensor to assess surface and near-surface conditions. A preliminary decision algorithm is developed that utilizes sensor outputs indicating resistance changes and surface temperature. The sensor consists …
Criteria And Practices Of Various States For The Design Of Jointless And Integral Abutment Bridges, Habib Tabatabai, Hassan Magbool, Ahmed Bahumdain, Cui Fu
Criteria And Practices Of Various States For The Design Of Jointless And Integral Abutment Bridges, Habib Tabatabai, Hassan Magbool, Ahmed Bahumdain, Cui Fu
Civil and Environmental Engineering Faculty Articles
The design of integral abutment bridges is not explicitly addressed in the U.S. bridge design specifications. Despite the lack of a specific national design standard for such bridges, their usage has grown steadily since several states began experimenting with this type of structure in the 1980s. The primary objective of the work reported here was to understand and compare the current (2017) design criteria and parameters that are being utilized by various states for the design of jointless and integral abutment bridges. In this paper, the required information was sought by obtaining all publicly-available “bridge design manuals” that are commonly …
Self-Assembled Levitating Clusters Of Water Droplets: Pattern-Formation And Stability, Alexander A. Fedorets, Mark Frenkel, Evgeny Shulzinger, Leonid A. Dombrovsky, Edward Bormashenko, Michael Nosonovsky
Self-Assembled Levitating Clusters Of Water Droplets: Pattern-Formation And Stability, Alexander A. Fedorets, Mark Frenkel, Evgeny Shulzinger, Leonid A. Dombrovsky, Edward Bormashenko, Michael Nosonovsky
Mechanical Engineering Faculty Articles
Water forms ordered hexagonally symmetric structures (snow crystals) in its solid state, however not as liquid. Typically, mists and clouds are composed of randomly moving small droplets lacking any ordered structure. Self-organized hexagonally patterned microdroplet clusters over locally heated water surfaces have been recently observed. However, many aspects of the phenomenon are far from being well understood including what determines droplets size, arrangement, and the distance between them. Here we show that the Voronoi entropy of the cluster tends to decrease indicating to their selforganization, while coupling of thermal effects and mechanical forces controls the stability of the clusters. We …
Darcy's Law-Based Model For Predicting Wicking Of Liquids In Glass-Fiber Wicks, Mohammad Amin Faghihi Zarandi, Krishna M. Pillai, Adam Kimmel
Darcy's Law-Based Model For Predicting Wicking Of Liquids In Glass-Fiber Wicks, Mohammad Amin Faghihi Zarandi, Krishna M. Pillai, Adam Kimmel
Mechanical Engineering Faculty Articles
Spontaneous imbibition of liquids in glass-fiber wicks, where a liquid-front progresses during the wicknig process, is investigated experimentally and modeled using the concepts of single-phase flow in porous media. In order to have an accurate validation of the proposed model, a well-characterized glass-fiber wick and wicking liquid are used to plot the liquid-front of absorbed liquid as a function of time. The experimental outcomes are fcompared with predictions by the proposed analytical solution obtained by combining Darcy's law with the continuity equation and a capillary (suction) pressure formula imposed on the liquid front. The theoretical permeability and capillary-pressure formula used …