The Experts below are selected from a list of 57 Experts worldwide ranked by ideXlab platform
Richard Sause - One of the best experts on this subject based on the ideXlab platform.
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fatigue of web Flange Weld of corrugated web girders 2 analytical evaluation of fatigue strength of corrugated web Flange Weld
International Journal of Fatigue, 2005Co-Authors: Kengo Anami, Richard SauseAbstract:The challenges in evaluating the fatigue strength of the web-Flange Weld of corrugated web girders are the complexity of the stress field and uncertainty regarding the appropriate fatigue strength category. In this paper, using finite element analysis and crack propagation analysis, the fatigue strength of this web-Flange Weld is analytically examined. The main conclusions are that the fatigue strength is negatively affected by the existence of the longitudinal folds of the corrugated web and that it is necessary to have a large bend radius so that the fatigue critical point on the inclined folds are far from the longitudinal folds to eliminate the influence of the longitudinal folds. In addition, simple methods to estimate the predict fatigue life of the web-Flange Welds of corrugated web girders are proposed.
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fatigue of web Flange Weld of corrugated web girders 1 influence of web corrugation geometry and Flange geometry on web Flange Weld toe stresses
International Journal of Fatigue, 2005Co-Authors: Kengo Anami, Richard Sause, Hassa H AbbasAbstract:The fatigue performance of the web-Flange Weld of steel girders with trapezoidal corrugated webs was examined experimentally, using large-scale girder specimens, and analytically. The focus was on a region of constant bending moment. Fatigue cracks initiated at many points along the inclined folds, and then propagated perpendicular to the principal stress direction. Propagation of cracks initiating near the end of the inclined folds led to failure. Parametric FEM analyses indicated that the corrugation angle and the bend radius at the fold lines of the corrugations are the parameters that most influence the stress at the web-Flange Weld toe.
Kengo Anami - One of the best experts on this subject based on the ideXlab platform.
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fatigue of web Flange Weld of corrugated web girders 2 analytical evaluation of fatigue strength of corrugated web Flange Weld
International Journal of Fatigue, 2005Co-Authors: Kengo Anami, Richard SauseAbstract:The challenges in evaluating the fatigue strength of the web-Flange Weld of corrugated web girders are the complexity of the stress field and uncertainty regarding the appropriate fatigue strength category. In this paper, using finite element analysis and crack propagation analysis, the fatigue strength of this web-Flange Weld is analytically examined. The main conclusions are that the fatigue strength is negatively affected by the existence of the longitudinal folds of the corrugated web and that it is necessary to have a large bend radius so that the fatigue critical point on the inclined folds are far from the longitudinal folds to eliminate the influence of the longitudinal folds. In addition, simple methods to estimate the predict fatigue life of the web-Flange Welds of corrugated web girders are proposed.
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fatigue of web Flange Weld of corrugated web girders 1 influence of web corrugation geometry and Flange geometry on web Flange Weld toe stresses
International Journal of Fatigue, 2005Co-Authors: Kengo Anami, Richard Sause, Hassa H AbbasAbstract:The fatigue performance of the web-Flange Weld of steel girders with trapezoidal corrugated webs was examined experimentally, using large-scale girder specimens, and analytically. The focus was on a region of constant bending moment. Fatigue cracks initiated at many points along the inclined folds, and then propagated perpendicular to the principal stress direction. Propagation of cracks initiating near the end of the inclined folds led to failure. Parametric FEM analyses indicated that the corrugation angle and the bend radius at the fold lines of the corrugations are the parameters that most influence the stress at the web-Flange Weld toe.
Hassa H Abbas - One of the best experts on this subject based on the ideXlab platform.
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fatigue of web Flange Weld of corrugated web girders 1 influence of web corrugation geometry and Flange geometry on web Flange Weld toe stresses
International Journal of Fatigue, 2005Co-Authors: Kengo Anami, Richard Sause, Hassa H AbbasAbstract:The fatigue performance of the web-Flange Weld of steel girders with trapezoidal corrugated webs was examined experimentally, using large-scale girder specimens, and analytically. The focus was on a region of constant bending moment. Fatigue cracks initiated at many points along the inclined folds, and then propagated perpendicular to the principal stress direction. Propagation of cracks initiating near the end of the inclined folds led to failure. Parametric FEM analyses indicated that the corrugation angle and the bend radius at the fold lines of the corrugations are the parameters that most influence the stress at the web-Flange Weld toe.
Matos, Carlos Gustavo - One of the best experts on this subject based on the ideXlab platform.
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Numerical Investigation of Cleavage Fracture in Welded Connections of Steel Moment Resistant Frames
1Co-Authors: Matos, Carlos GustavoAbstract:126 p.Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2001.This study applies an advanced micro-mechanics model of cleavage fracture in ferritic steels to examine the behavior of Welded, moment resistant steel frames of the type widely constructed prior to the 1994 Northridge earthquake. The Weibull stress model for cleavage, coupled with 3-D analyses of connections containing crack-like defects, provides a quantitative estimate of the cumulative failure probabilities with increasing beam moment. The 3-D models incorporate the complete geometry of a Welded joint (access holes, shear tabs, continuity plate, Weld geometry, backup bars). A set of previously conducted, 15 full-scale tests on T-connections of the pre-Northridge design (A36 beams, A572 columns, E70T-4 Welds, backup bars left in place) provide fracture moments to calibrate parameters of the Weibull stress model. This study initially considers quasi-static loading typically imposed in large-scale testing of the connections. Once calibrated, the model is used here to examine the importance of Welding induced residual stresses in the lower-Flange Weld, the effects of stronger (A572) beams and modified access hole geometries, and a variety of proposed changes in the Weld detail (backup bars, fillet reinforcements). The model predicts the cumulative failure probability for these various configurations. Using this same approach, the simplified "pull-plate" specimen is examined from a fracture mechanics viewpoint as a suitable replacement for full connection testing to evaluate alternative Welding details. The study concludes by investigating the increased probability of cleavage fracture due to dynamic loading rates of the levels expected during a strong seismic event.U of I OnlyRestricted to the U of I community idenfinitely during batch ingest of legacy ETD
Amidi Ala - One of the best experts on this subject based on the ideXlab platform.
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Bolted Flange Alternatives for Moment -Resisting Connections
1Co-Authors: Amidi AlaAbstract:474 p.Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2000.These alternative connections eliminated the backing bar, used high quality shop Weld, and reduced the high stress and strain demand on the Weld. Therefore, the failure of the bottom Flange Weld did not occur. However, for connections using the bottom girder Flange component only, the inelastic mode of failure occurred at the top girder Flange Weld. Using the reduced Flange plate at both the top girder Flange and the bottom girder Flange was the most effective method to develop large inelastic rotations of the joint with stable hysteretic behavior.U of I OnlyRestricted to the U of I community idenfinitely during batch ingest of legacy ETD