Now showing items 3121-3140 of 3153

    • Transient Impact Response of Bridge I-Girders with and without Flaws 

      Yiching Lin; Kuo-Lung Lin (American Society of Civil Engineers, 1997)
      This paper presents both numerical and experimental studies of the transient response of concrete I-girders with and without flaws subjected to transverse elastic point impact. These studies were aimed at evaluating the ...
    • Finite-Element Analysis of Steel Girder Highway Bridges 

      Mounir E. Mabsout; Kassim M. Tarhini; Gerald R. Frederick; Charbel Tayar (American Society of Civil Engineers, 1997)
      This paper compares the performance of four finite-element modeling techniques reported in the literature used in evaluating the wheel load distribution factors of steel girder bridges. A typical one-span, simply supported, ...
    • Structural Deterioration Assessment for Steel Bridges 

      Daniel N. Farhey; Aniruddha M. Thakur; Relva C. Buchanan; A. Emin Aktan; Narayanan Jayaraman (American Society of Civil Engineers, 1997)
      A rational approach for evaluating structural integrity of aged and deteriorated steel bridges—incorporating analytical, mechanical, and microstructural characterizations—is presented. Critical regions of built-up members, ...
    • <i>PRACTITIONERS' FORUM: Bolted Splices: A Look at Design Criteria</i> 

      Muthiah Kasi; Harold R. Sandberg (American Society of Civil Engineers, 1997)
    • Influence of Sidewalks and Railings on Wheel Load Distribution in Steel Girder Bridges 

      Mounir E. Mabsout; Kassim M. Tarhini; Gerald R. Frederick; Marwan Kobrosly (American Society of Civil Engineers, 1997)
      The conventional analysis and design of highway bridges ignore the contribution of sidewalks and/or railings in a bridge deck when calculating the flexural strength of superstructures. The presence of sidewalks and railings ...
    • Load Distribution and Impact Factors for I-Girder Bridges 

      Sangjin Kim; Andrzej S. Nowak (American Society of Civil Engineers, 1997)
      This paper presents the procedure and results of field tests that were performed on two simply supported steel I-girder bridges to assess girder distribution and impact factors. The measurements were performed under normal ...
    • Reliability of Inelastic Load Capacity Rating Limits for Steel Bridges 

      Michael G. Barker; John A. Zacher (American Society of Civil Engineers, 1997)
      To achieve consistent levels of safety over the bridge inventory, consideration should be given to the ultimate capacity of the system. Although multispan, longitudinally redundant bridges show significant reserve capacity ...
    • Cable-Stayed Bridges—Parametric Study 

      T. P. Agrawal (American Society of Civil Engineers, 1997)
      In this paper, the effect of number of cables and the length of central panel on the behavior of radiating-type cable-stayed bridges has been investigated. The study was carried out for double-plane bridges with 12, 20, ...
    • Experimental Load Rating of a Posted Bridge 

      Michael J. Chajes; Dennis R. Mertz; Brett Commander (American Society of Civil Engineers, 1997)
      Results of an experimental load test of a posted, three-span, steel-girder-and-slab bridge are presented. The bridge was designed to have three simple supported spans, each consisting of a cross section with nine noncomposite ...
    • Approximate Analysis of Irregular Slab-on-Girder Bridges 

      Sami W. Tabsh; Kalpana Sahajwani (American Society of Civil Engineers, 1997)
      A simple, approximate method for determining the live-load girder distribution factors of irregular slab on I-beam bridge layouts is presented. The method can also be used for the live-load analysis of bridges subjected ...
    • Experimental Load Rating Study of a Historic Truss Bridge 

      Thomas E. Boothby; Richard J. Craig (American Society of Civil Engineers, 1997)
      A field test of a complicated statically indeterminate floor system on a historic steel truss bridge has been conducted to obtain a more accurate load rating of the structure than possible using calculated predictions of ...
    • Reliability-Based Method for Fatigue Evaluation of Railway Bridges 

      Daniel H. Tobias; Douglas A. Foutch (American Society of Civil Engineers, 1997)
      A newly developed method for the fatigue evaluation of riveted railway bridges is presented in the paper. The data that were collected during a large-scale bridge instrumentation program along with the fatigue resistance ...
    • Yield Interaction Equations for Nominal Bending Strength of Curved I-Girders 

      Chai H. Yoo; James S. Davidson (American Society of Civil Engineers, 1997)
      Horizontally curved I-girders are subjected to combined vertical bending and torsion under gravity loading alone. The torsional behavior of open I-shaped girders is commonly and conveniently equated to self-equilibrating ...
    • Bearing Pressures for Rectangular Footings with Biaxial Uplift 

      Kenneth E. Wilson (American Society of Civil Engineers, 1997)
      Footings that are subject to axial load and bending can have a portion of their footing area that does not act in bearing. To design for such a loading condition, the engineer must compute the maximum bearing pressure, the ...
    • Design Methodology for Strengthening of Continuous-Span Composite Bridges 

      H. A. El-Arabaty; F. W. Klaiber; F. S. Fanous; T. J. Wipf (American Society of Civil Engineers, 1996)
      Increases in legal-load limits as well as lack of maintenance has rendered a large number of bridges in the United States deficient and in need of rehabilitation or strengthening. Many of these bridges are classified as ...
    • Analytical and Measured Strains in Sunshine Skyway Bridge. II 

      Mohsen A. Shahawy; M. Arockiasamy (American Society of Civil Engineers, 1996)
      This paper presents a methodology for the analysis of stage-constructed prestressed-concrete bridges. The method uses the step-by-step superposition of strains and accounts for time-dependent effects including creep, ...
    • Static Behavior of Noncomposite Concrete Bridge Decks under Concentrated Loads 

      Michael F. Petrou; Philip C. Perdikaris; Mingzhu Duan (American Society of Civil Engineers, 1996)
      Tests were conducted under a concentrated monotonically increasing static wheel load on 1/6.6-scale physical models of three different types of noncomposite deck structure: (1) the entire deck supported on four steel ...
    • Stretching Span Capability of Prestressed Concrete Bridges under AASHTO LRFD 

      Yohchia Chen; Alex Aswad (American Society of Civil Engineers, 1996)
      A general refined analysis procedure for predicting the vehicular live load distribution on simply supported bridge girders is described. Load and Resistance Factor Design (LRFD) distribution factor formulas for flexure ...
    • Cable-Stayed Bridge Concept for Longer Spans 

      Uwe Starossek (American Society of Civil Engineers, 1996)
      Achieving larger maximum spans by inventing new bridge systems has always been a fascinating intellectual challenge. Several concepts of modified cable-supported bridges have been proposed in the past that promise to surpass ...
    • Loading Spectra for Railway Bridges under Current Operating Conditions 

      Daniel H. Tobias; Douglas A. Foutch; John Choros (American Society of Civil Engineers, 1996)
      Some important results from a research program investigating railway bridges in North America are presented in the paper. A primary goal of the program was to measure the loading spectra to which railway bridges are currently ...