Low-Cement Concrete Mixture For Bridge Decks And Rails,
University of Nebraska-Lincoln
Low-Cement Concrete Mixture For Bridge Decks And Rails, Soumitra Das, George Morcous Ph.D., Jiong Hu
Nebraska Department of Transportation: Research Reports
Right after construction, drying shrinkage of restrained concrete bridge decks and rails causes early-age cracking, insertion of water and chemicals, and corrosion of reinforcing steel that eventually leads to delamination and spalling of concrete. The main objective of this research is to control early-age shrinkage cracking by reducing cementitious material content in bridge deck and rail concrete mixtures. Several reduced cementitious materials concrete (RCMC) mixtures were developed by optimizing aggregate particle packing and conducting overall performance evaluation. This evaluation was carried out in three phases. The first phase investigated the feasibility of new RCMC mixtures by testing workability, compressive strength, …
Performance Analysis Of Steel Bridge Deck Reinforced By Uhpc Based On Fracture Mechanics,
Guangdong Communication Planning & Design Institute Group Co., Ltd., Guangzhou, Guangdong 510080, China
Performance Analysis Of Steel Bridge Deck Reinforced By Uhpc Based On Fracture Mechanics, Long Yiyu, Chen Shuangqing, Tang Chunyan, Peng Yajun, Zhou Zejian
Journal of China & Foreign Highway
At the deck-rib welding joints of orthotropic steel bridge decks, cracking can easily occur under the vehicle load, and the fatigue risk of steel bridge decks can be effectively reduced by UHPC reinforcement. To investigate the effect of UHPC-reinforced steel bridge decks, this paper carried out finite element analysis based on linear-elastic fracture mechanics. By taking the orthotropic steel bridge deck test as the reference, the fatigue performance at the weld toe was calculated, and the reliability of the finite element model was verified. Stress intensity factor calculation analysis was performed by inserting an initial crack at the weld detail, …
Key Technology Of Demolition And Reconstruction Design Of Wudou Bridge,
Henan Provincial Communications Planning & Design Institute Co., Ltd., Zhengzhou, Henan 450052, China
Key Technology Of Demolition And Reconstruction Design Of Wudou Bridge, Li Huaqiang
Journal of China & Foreign Highway
Bridges constructed between the 1960s and 1970s have been damaged to different degrees during operation due to excessive traffic flow and severe overloading of vehicles, and thus cannot meet the requirements for safe passage of vehicles and navigation. Therefore, they need to be demolished and rebuilt. To safely, economically and efficiently demolish the old bridges and rebuild them in-situ, this paper studied a design concept of integrated construction and demolition. Based on the Wudou Bridge demolition and reconstruction project in Foshan, the combination of theoretical analysis and computational simulation was utilized to conduct a multi-scheme study from the perspectives of …
Analysis Of Lost Times At Signalized Intersections,
University of Kentucky
Analysis Of Lost Times At Signalized Intersections, Kenneth R. Agent, Joseph D. Crabtree
Kentucky Transportation Center Research Report
When determining the capacity of a signalized intersection, knowledge of certain traffic parameters is necessary. The previous investigation conducted under this study dealt with an analysis of saturation flow values. The objective of this investigation was to determine appropriate values to use for lost times at signalized intersections. The lost times at the beginning and ending of the phases were analyzed, as well as lost times during the phase due to the interference of pedestrians, local buses, and opposing traffic for left turns. Factors affecting those lost time values were identified. The lost time values, along with the previously identified …
Development Of Turning Templates For Various Design Vehicles,
University of Kentucky
Development Of Turning Templates For Various Design Vehicles, Kenneth R. Agent, Jerry G. Pigman
Kentucky Transportation Center Research Report
The objective of this study was to develop the data necessary to produce the turning templates that would represent the minimum turning paths for critical design vehicles. This would include information concerning truck turning radii and offtracking for larger trucks with varying wheelbases operating in Kentucky. In order for the turning templates used for the various design vehicles to be based on the same procedure, data were produced tor design vehicles ranging from a passenger car to a combination truck with a 53 foot trailer. The simulation model used was the Truck Offtracking Model (TOM) and was developed by the …
From Himalayan Catastrophe To National Resilience: Lessons From The 2026 Bhote Koshi And Trishuli River Floods In Nepal,
Arizona State University; and, Institute for Integrated Development Studies (IIDS), Nepal
From Himalayan Catastrophe To National Resilience: Lessons From The 2026 Bhote Koshi And Trishuli River Floods In Nepal, Keshav Bhattarai, Ambika P. Adhikari
Himalayan Research Papers Archive
On the morning of 26 August 2026, the mountains above Nepal’s northern frontier delivered a disaster of almost unimaginable speed and scale. A massive mass of ice, rock, and sediment detached in the high Himalayan terrain near the Nepal–Tibet border, descended roughly 1,200 metres, interacted with the Lhende Khola system, and generated a debris-rich flood that surged through the Bhote Koshi and Trishuli river corridors, destroying settlements, markets, roads, bridges, hydropower facilities, and an international border crossing and transforming them into fields of mud, boulders, and wreckage within minutes (ICIMOD, 2026b; Reuters, 2026a). Satellite analysis indicates that a substantial section …
Lucidpipe™ Power System,
Construction Engineering & Management, Purdue University
Lucidpipe™ Power System, Purdue Ect Team
ECT Fact Sheets Archive
In most gravity fed water transmission pipelines, it is desired to reduce excess pressure head to prevent undue strain on a pipeline and lower the incidence of leaks. Normally this is done with pressure reducing valves that essentially burn off this excess pressure as heat. The LucidPipe™ system converts it to low cost electricity thereby removing unwanted pressure and generating energy at the same time - energy that can be put used behind the grid or put back on the grid. The LucidPipe™ system extracts a small percentage of pressure head providing nearly invisible operation allowing water operators to fulfill …
Proctor Compaction Testing,
University of Nebraska - Lincoln
Proctor Compaction Testing, Joshua Connelly, Wayne Jensen, Paul Harmon
Nebraska Department of Transportation: Research Reports
No abstract provided.
To Predict With Confidence, Plan For Freedom,
Jarrett Walker + Associates
To Predict With Confidence, Plan For Freedom, Jarrett Walker
Journal of Public Transportation
No abstract provided.
Optimal Design Of Work Zone Median Crossovers,
University of Nebraska-Lincoln
Optimal Design Of Work Zone Median Crossovers, Karen Schurr, Brian R. Garnder, Shashwat Rijal
Nebraska Department of Transportation: Research Reports
No abstract provided.
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