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- Bridges -- Oregon -- Design and construction -- Evaluation (1)
- Bridges -- Oregon -- Design and construction -- Evaluation -- Planning (1)
- Bridges -- Oregon -- Foundations and piers -- Evaluation (1)
- Bridges -- Retrofitting -- Oregon -- Evaluation (1)
- Bridges -- Retrofitting -- Oregon -- Evaluation -- Planning (1)
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- Carbon fiber-reinforced plastics -- Testing (1)
- Concrete beams -- Testing (1)
- Earthquake hazard analysis -- Oregon (1)
- Earthquake hazard analysis -- Oregon -- Planning (1)
- Earthquake resistant design -- Oregon -- Evaluation (1)
- Earthquake resistant design -- Oregon -- Evaluation -- Planning (1)
- Fiber-reinforced concrete -- Testing (1)
- Flexure -- Testing (1)
- Foundations (1)
- Metal fibers (1)
- Piling (Civil engineering) -- Design and construction (1)
- Polypropylene fibers (1)
- Reinforced concrete -- Evaluation (1)
- Shear (Mechanics) (1)
- Slopes (Soil mechanics) -- Stability (1)
- Soil liquefaction (1)
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Articles 1 - 5 of 5
Full-Text Articles in Engineering
Bridge Seismic Retrofit Measures Considering Subduction Zone Earthquakes, Peter Dusicka, Ramiro Bazaez, Sarah Knoles
Bridge Seismic Retrofit Measures Considering Subduction Zone Earthquakes, Peter Dusicka, Ramiro Bazaez, Sarah Knoles
Civil and Environmental Engineering Faculty Publications and Presentations
Over the years, earthquakes have exposed the vulnerability of reinforced concrete structures under seismic loads. The recent occurrence of highly devastating earthquakes near instrumented regions, e.g. 2010 Maule, Chile and 2011 Tohoku, Japan, has demonstrated the catastrophic impact of such natural force upon reinforced concrete structures. Research was conducted to investigate the effect of subduction zone earthquakes on structural damage. The study suggests that large magnitude ground motions of long duration have the potential of significantly increasing the number of inelastic excursions and consequently incur more extensive structural damage as compared to ground motions with similar elastic spectral demands but …
Experimental Investigation Of Fiber Reinforced Concrete Beams, Karrar Ali Al-Lami
Experimental Investigation Of Fiber Reinforced Concrete Beams, Karrar Ali Al-Lami
Dissertations and Theses
Shear strength of fiber reinforced concrete beams was studied in this research project. Three types of fibers were examined: hooked-end steel fiber, crimped-steel fiber, and crimped-monofilament polypropylene fibers. The experimental program included five beam specimens. Two of the beams were control specimens in which one was reinforced with minimum shear reinforcement according to ACI 318, while the other one did not have any shear reinforcement. Each one of the other three specimens was reinforced with one of the above mentioned fibers by 1% volumetric ratio. In addition to the beam specimens, three prisms were also made for each type fiber …
Seismic Retrofit Benefit Considering Statewide Transportation Assessment, Selamawit Tesfayesus Mehary, Peter Dusicka
Seismic Retrofit Benefit Considering Statewide Transportation Assessment, Selamawit Tesfayesus Mehary, Peter Dusicka
Civil and Environmental Engineering Faculty Publications and Presentations
The purpose of this study was to identify and demonstrate a methodology to prioritize bridges for retrofit in the State of Oregon. Given the limited resources available, retrofitting all vulnerable bridges in the foreseeable future would not be practical. Instead, a retrofit strategy needs to be developed to prioritize the inventory and enumerate the retrofit cost. In this study, a prioritization methodology used a holistic assessment of overall roadway system to consider highway route segments, rather than individual bridges. The overall assessment was based on a cost-benefit analysis including retrofit cost, expected economic loss (with or without retrofit) and social …
Behavior Of Reinforced Concrete Beams Retrofitted In Flexure Using Cfrp-Nsm Technique, Salam Al-Obaidi
Behavior Of Reinforced Concrete Beams Retrofitted In Flexure Using Cfrp-Nsm Technique, Salam Al-Obaidi
Dissertations and Theses
A variety of retrofitting methods are used to upgrade existing structures. For example, steel plates and Fiber Reinforced Polymer (FRP) jackets are externally bonded to members to increase their capacity in flexure and shear. However, due to the issue of corrosion these strengthening systems may lose their efficiency with time. FRP materials have been used to strengthen many structural components of different shapes and types. FRP jackets, FRP Strips, and FRP rods have commonly been used to rehabilitate existing structural components. The many advantages of using FRP as strengthening materials have made this material an attractive alternative: advantages such as …
Design Of Piles In Liquefied Soils For Combined Inertial And Kinematic Demands, Arash Khosravifar, J. Ugalde, T. Travasarou
Design Of Piles In Liquefied Soils For Combined Inertial And Kinematic Demands, Arash Khosravifar, J. Ugalde, T. Travasarou
Civil and Environmental Engineering Faculty Publications and Presentations
The design of piles penetrating liquefiable soils poses a number of challenges, including 1) accounting for the effects of liquefaction on lateral soil springs (p-y), 2) estimating liquefaction-induced kinematic demands (lateral spreading displacements) including pile-pinning effects, and 3) combining the effects of inertial demands from superstructure and kinematic demands from liquefied ground. This paper illustrates two approaches to address the above questions: A) a simplified decoupled approach adopting equivalent static analysis (ESA), and B) a detailed, coupled approach adopting nonlinear dynamic analyses (NDA). These approaches are presented through example projects showing the limitations and the potential conservatism associated with the …