CONDITION EVALUATION AND LOAD RATING OF STEEL STRINGER HIGHWAY BRIDGES USING FIELD CALIBRATED 2D-GRID AND 3D-FE MODELS

CONDITION EVALUATION AND LOAD RATING OF STEEL STRINGER HIGHWAY BRIDGES USING FIELD CALIBRATED 2D-GRID AND 3D-FE MODELS

Bibliographic Details
Main Author: Turer, Ahmet
Language:English
Published: University of Cincinnati / OhioLINK 2000
Subjects:
Finite Element modeling
Calibration
Rating
Analysis
Influence Line
Online Access:http://rave.ohiolink.edu/etdc/view?acc_num=ucin985895002
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spelling ndltd-OhioLink-oai-etd.ohiolink.edu-ucin9858950022021-08-03T06:16:02Z CONDITION EVALUATION AND LOAD RATING OF STEEL STRINGER HIGHWAY BRIDGES USING FIELD CALIBRATED 2D-GRID AND 3D-FE MODELS Turer, Ahmet Finite Element modeling Calibration Rating Analysis Influence Line Alternative methods to one-dimensional (1D) model based load rating for steel stringer bridges are further explored. Geometric model generation and load definition for 2D-Grid and 3D finite element (FE) models are streamlined by developing computer programs, and generation/definition time is drastically reduced. Two-dimensional grid model calibration is automated. Six typical steel stringer highway bridges (in operation) are used for modeling, testing, and calibration. The generated models are used to simulate x-brace and unintended composite action losses, which are believed to happen prior to reaching the rating load of a bridge. The rating factors for each model are obtained using different model types (i.e., 2D-Grid and 3D-FEM), modeling levels (i.e., nominal and calibrated), rating methods (i.e., ASD and LFD), rating levels (i.e., inventory and operating), and rating conditions (i.e., "as-is", "x-braces loss", and "composite action loss"). The rating factors are compared and conclusions are drawn. Calibrated 2D-Grid model based rating factors are close to calibrated 3D-FE model based rating factors. Grid models are easier to model and calibrate while 3D-FE models are more flexible in identifying most critical members as well as simulating loss of unintended composite action and similar phenomenon. In addition to 2D-Grid and 3D-FEM based linear analyses, 1D-nonlinear rating alternatives are investigated using collapse analysis, and the resulting rating factors are compared against those obtained from linear models. Furthermore, rating formulas based on "punching shear" and "one-way slab bending" are developed and used to rate the six bridges used in this study. For some of the bridges, the engineering checks are found to be more critical than the minimum 3D-FE model based rating factors while for other bridges the rating factors have similar order of magnitudes. Additional theoretical methods for a) decomposition of unit influence line for measured crawl speed truck load response using sine curve fit, b) extracting cross-sectional EI coefficient using strain and deflection data, and c) computation of composite action percentage between the concrete deck and the steel girders, are developed and presented. 2000 English text University of Cincinnati / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=ucin985895002 http://rave.ohiolink.edu/etdc/view?acc_num=ucin985895002 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection NDLTD
language English
sources NDLTD
topic Finite Element modeling
Calibration
Rating
Analysis
Influence Line
spellingShingle Finite Element modeling
Calibration
Rating
Analysis
Influence Line
Turer, Ahmet
CONDITION EVALUATION AND LOAD RATING OF STEEL STRINGER HIGHWAY BRIDGES USING FIELD CALIBRATED 2D-GRID AND 3D-FE MODELS
author Turer, Ahmet
author_facet Turer, Ahmet
author_sort Turer, Ahmet
title CONDITION EVALUATION AND LOAD RATING OF STEEL STRINGER HIGHWAY BRIDGES USING FIELD CALIBRATED 2D-GRID AND 3D-FE MODELS
title_short CONDITION EVALUATION AND LOAD RATING OF STEEL STRINGER HIGHWAY BRIDGES USING FIELD CALIBRATED 2D-GRID AND 3D-FE MODELS
title_full CONDITION EVALUATION AND LOAD RATING OF STEEL STRINGER HIGHWAY BRIDGES USING FIELD CALIBRATED 2D-GRID AND 3D-FE MODELS
title_fullStr CONDITION EVALUATION AND LOAD RATING OF STEEL STRINGER HIGHWAY BRIDGES USING FIELD CALIBRATED 2D-GRID AND 3D-FE MODELS
title_full_unstemmed CONDITION EVALUATION AND LOAD RATING OF STEEL STRINGER HIGHWAY BRIDGES USING FIELD CALIBRATED 2D-GRID AND 3D-FE MODELS
title_sort condition evaluation and load rating of steel stringer highway bridges using field calibrated 2d-grid and 3d-fe models
publisher University of Cincinnati / OhioLINK
publishDate 2000
url http://rave.ohiolink.edu/etdc/view?acc_num=ucin985895002
work_keys_str_mv AT turerahmet conditionevaluationandloadratingofsteelstringerhighwaybridgesusingfieldcalibrated2dgridand3dfemodels
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