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Showing 1 to 15 of 15 for “"Bridge pier"”.
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Seismic behavior of bridge pier column lap splices
… and ductility, or shear strength, of concrete bridge columns have resulted in collapse or severe damage of a number of California bridges in recent moderate earth-quakes. In general, these bridges were designed prior to the new seismic design methods which were implemented in the mid-seventies. …
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Bridge Pier Surface Defect Detection Based on Improved YOLOV9
… detection methodology specifically designed for bridge piers, which integrates state-of-the-art image enhancement algorithms with sophisticated target detection frameworks. This hybrid approach effectively addresses some of the inherent limitations observed in existing deep learning-based defect …
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FOOTING FIXITY OF BRIDGE PIER WITH END-BEARING PILE FOUNDATION
… large axial loaded compression members, like bridge piers, are under lateral load impacts, the rotation at the base of the pier may cause a significant effect on the lateral deflection of the pier. However, traditionally the computation of slenderness ratio and the structure deflection due to …
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Numerical modelling of reinforced concrete bridge pier under artificially generated earthquake time-histories
… They are then used in the analysis of RC bridge piers under the AGETH. Several techniques including Fourier analysis, normalised cumulative spectrum, energy dissipation, damage index as well as probability applications are applied to quantify the structural response and damage. Based on …
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Assessing the Effectiveness of Reducing Seismic Vulnerability by a Program of Bridge Pier Wrapping
… research shows that: (a) The Southern Illinois bridge inventory reported here is reasonably representative of the bridge inventory in the New Madrid Seismic Zone as a whole and has characteristics that differ markedly from those for inventories of bridges in California seismic zones; (b) There …
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Investigating the Optimization of Terrestrial Laser Scanning Procedures for the Analysis of Concrete Bridge Pier Spalling
Asset management of bridge infrastructure will become increasingly important in the coming years, especially since 16% of bridges in Canada will reach their expected life span of 50 years by 2030. There is a need to improve current subjective visual inspections of bridges and implement solutions …
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Physical modeling of local scour around complex bridge piers
Local scour around bridge foundations has been recognized as one of the main causes of bridge failures. The objective of this study is to investigate the relationships among field, laboratory, and numerical data for the purpose of improving scour prediction methods for complex bridge piers. In this …
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HEAVY TRUCK COLLISION WITH BRIDGE PIERS
<p>Based on bridge failure data compiled by the New York State Department of Transportation, collision, both caused by vessels and vehicles, is the second leading cause of bridge failures after hydraulic. The current AASHTO-LRFD (2017) specification recommends designing a bridge pier vulnerable to …
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Modelling local scour around bridge piers using TELEMAC
Scour at bridge crossings is a major cause of bridge failure. There are several different types of scour such as general scour, constriction scour and local scour. One of the most serious types is local scour which occurs as a result of vortex formation around bridge piers and abutments (Hoffmans & …
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Simultaneous effect of slenderness, spatially varying excitation and support flexibility on dynamics of rocking bridges
In conventional bridge design, plastic hinges are permitted at predetermined locations to have controlled damage. However, this damage can cause the loss of bridge functionality and severely disrupt rescue efforts. The subsequent downtime and repair costs can be unpredictable. Recently, an …
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Remote sensing and localization of smart rocks with orientation-controlled magnets for real-time monitoring of bridge scour and riprap effectiveness
… to the deepest point of a scour hole around a bridge pier and provide its location through remote measurement over time. Once integrated into a riprap measure, the smart rock moves together with natural rocks and is thus a potential indicator of the effectiveness of the riprap measure. …
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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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Seismic Behavior of concrete filled steel Tubular Built-up columns
… ratio, such as stadium, industrial buildings, bridge pier and pillar, and electrical transmission tower. However, the research is mainly focused on static performance, seldom research has been reported on the dynamic behavior of CFST built-up columns. The present research investigates the …
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Smart rocks for bridge scour monitoring -- Design and localization using electromagnetic techniques and embedded orientation sensors
<p>"River bridge scour is an erosion process in which flowing water removes sediment materials (such as sand, rocks) from a bridge foundation, river beds and banks. As a result, the level of the river bed near a bridge pier is lowering such that the bridge foundation stability can be compromised, …
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Ground Improvement for Liquefaction Mitigation at Existing Highway Bridges
… of using ground improvement at existing highway bridges to mitigate the risk of earthquake-induced liquefaction damage has been studied. The factors and phenomena governing the performance of the improved ground were identified and clarified. Potential analytical methods for predicting the …