Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 19 of 19 for “"expansion joints"”.
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The tensile performance of closed cell foam expansion joints: a study on the deleterious effects of compression set
… material for a specific type of bridge deck expansion joint, usually in applications where the total movement to be accommodated is four inches or less. Adhered into the gap of an expansion joint, this material is responsible for maintaining a water tight smooth transition between deck slabs, …
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Development, Testing, and Evaluation of Bridge Bearing Movement Sensor System
Bridge bearings and expansion joints are critical features of bridges as they prevent the buildup of thermal stresses caused by changing temperatures. Current assessment techniques include visual inspections which are subject to inaccuracies based on the inspectors' judgement. Therefore, innovation …
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Assessment of structural concrete approach slab cracking at integral abutment bridges
The elimination of expansion joints between the bridge deck and approach slabs in an integral abutment bridge (IAB) decreases the potential for water and salt damage to the bridge superstructure and bearings. However, the lack of expansion joints in an IAB can lead to complex interactions between …
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Um programa para o cálculo automático estático e dinâmico de sistemas de tubulações
… in the analysis: mitre bends, valves, flanges, expansion joints and elastic restraints, among others components. Several types of loading may be considered simultaneously in the static analysis: gravity loads, thermal expansion and anchor movements, internal pressure, and others sustained …
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Seismic behavior and design of integral abutment bridges in southern Illinois
… in modern bridge design due to their lack of expansion joints between the superstructure and abutment, which can lead to decreased damage at the abutment seat when compared to stub abutment bridges because water, soil, and deicing chemicals are unable to penetrate through a compromised …
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Methods for Evaluation of the Remaining Strength in Steel Bridge Beams with Section Losses due to Corrosion Damage
… is common in rural bridges with leaking expansion joints, which exposes the superstructure to corrosive road deicing solutions. Seventeen beams from 4 decommissioned structures throughout Virginia were tested to induce web shear failure near the bearing locations and measured for load, …
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NDT to characterize 3D printed concrete interlayer bonds
… structure. Layer interfaces can form cold joints, or bond weaknesses, that could compromise structural integrity. Furthermore, the unique characteristics and geometric constraints associated with 3D printed concrete render traditional inspection methods to characterize material quality …
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Applications of finite element method in studying mechanical behavior of concrete materials on different scales
… for estimating the opening at concrete expansion joints. After further considering the actual boundary condition, the modeling effort demonstrates acceptable accuracy of the simulation result. The good agreement between the FEM simulation and the field measurement confirms a realistic …
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An Evaluation of Historic Cement Stucco Using Conditions Assessment Methodology and Digital Visualization Tools, Grand Teton National Park, USA
… a number of causes, including a lack of designed expansion joints, poor installation, and uneven settlement, and an assumption is that it may pose a safety hazard if left untreated. The NPS would like to open the site to visitation while preserving the integrity of the structure and the stucco …
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Performance of shape memory alloy rehabilitated bridge columns under sequential earthquakes
… other bridge components such as abutments or expansion joints. Furthermore, the seismic damage status and post-earthquake functionality of the SMA retrofitted bridge after multiple earthquake events are assessed. Lastly, an advanced evaluation method which effectively combines numerical and …
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Evaluation of the need for longitudinal median joints in bridge decks on dual structures
… use (in Iowa and beyond), since they have no expansion joints to allow leaking of chloride-contaminated water that can corrode the bottom of the deck and the adjacent girders. Thus, the practice of limiting bridge width and introducing a "joint" between dual bridges goes against other current …
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Three-dimensional numerical analysis of reflective cracks in airfield pavements
… complex stresses and strains in the vicinity of expansion joints and cracks in the PCC, thus dramatically reducing the life of the HMA overlay, typically in the form of reflective cracking. Reflective cracking is a fatigue cracking distress, which is initiated at the bottom of the HMA overlay and …
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Experimental and Analytical Investigations of Piles and Abutments of Integral Bridges
Bridges without expansion joints are called "integral bridges." Eliminating joints from bridges crates concerns for the piles and the abutments of integral bridges because the abutments and the piles are subjected to temperature-induced cyclic lateral loads. As temperatures change daily and …
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Proyecto de muros de sótano, sometidos a cargas verticales originadas por pilares de fachada
… the wall foundations, where the distance between expansion joints exceed 20 m, is hardly touched upon in technical papers and, consequently, not justified in the calculation reports attached to the projects. The same holds true for the local effects of column supports on walls and for the …
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Estudio analítico y experimental de los efectos de las deformaciones impuestas en las estructuras integrales : Monitorización de estructuras reales y contrastaciones teóricas
… of a great length with a limited number of expansion joints. They are subject to vertical loads and imposed axial deformations such as shrinkage, creep and/or temperature. Research on the combined effect of bending moments and imposed axial strain is almost nonexistent in today’s literature. …
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Integral bridge abutment and backfill behaviour
Integral bridges do not contain the bearings or expansion joints found in conventional bridges. Interaction between the abutments and backfill due to thermal movements of the bridge deck leads to the accumulation of soil strain — known as strain ratcheting — which results in increased lateral earth …
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Live Load Testing and Analysis of the Southbound Span of U.S. Route 15 over Interstate-66
more funding must be allocated for their rehabilitation or replacement. The Federal Highway Administration's (FHWA) Long-Term Bridge Performance (LTBP) Program has been developed to help bridge stakeholders make the best decisions concerning the allocation of these funds. This is done through the …
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Illinois integral abutment bridges: behavior under extreme thermal loading and design recommendations
… costs due to reduced damage to bearings, expansion joints, and other conventional appurtenances; and will correspondingly enjoy longer service life-spans. However, limitations on overall length and skew of IABs, as well as typical design details, vary considerably from state to state. …