Dynamic Tests and System Identification of Bridges
A five-span, four-hundred-foot long, reinforced concrete box girder birdge supported on single column piers that are pile-founded was subjected to extensive dynamic tests. The pullback...

Wave and Earthquake Response of Offshore Structures: Evaluation of Modal Solutions
Direct numerical integration of the equations of motion is used to evaluate the adequacy of modal solutions, as applied to the analysis and design of large offshore structures under wave...

Beam Element Stiffness Matrix for X-Braced Truss
The techniques of discrete field analysis are utilized to investigate the response of X-braced trusses to various static loading conditions. Deflection formulas for arbitrary static loads...

Buckling of Cooling Towers
The main goal of this study is to provide a clearer basis for judging the succeding safety of wind-loaded cantilever hyperboloidal shells. New predictions for cooling tower buckling are...

Creep Buckling of Reinforced Concrete Columns
An analysis is described for the long-term buckling behavior of reinforced concrete columns using the superposition model for creep analysis. The analysis considers the complete strain...

Computer-Simulated Flexural Tests of Partially Prestressed Concrete Sections
Partially prestressed concrete is redefined in terms of three variables related to the total amount of steel reinforcement, the proportion of high strength to total amount of steel reinforcement,...

Finite Element Model for Composite Masonry
A two-dimensional composite element is developed in this study that is capable of predicting the out-of-plane interlaminar shearing stresses between the brick and block wythes without...

Forest Service Timber Bridge Specifications
Approximately one half of the 12,000 Forest Service road and trail bridges are constructed of wood or have wood as a major component. The number constructed each year fluctuates with the...

Lateral-Distribution Factors for Fatigue Design
An extensive finite-element parametric study developed a chart giving lateral-distribution factors for the fatigue design of steel highway bridges. The chart gives conservative upper-limit...

Probabilistic Evaluation of Welded Structures
Some deficiencies in structual welding, particularly when thousands of welds are installed, are expected. This deficiency may or may not compromise the strength of the joint or the structural...

Impact Factors for Fatigue Design
Theoretical and experimental information is presented on impact factors for the fatigue design of steel highway bridges. Theoretical studies suggest that the impact factors for individual...

Spectra of Road Surface Roughness on Bridges
The power spectral density (PSD) of road surface roughness on highway bridges is presented. Eighty-four lines of 56 bridges were measured and the road surface roughness was measured by...

Prediction and Control of Pedestrian-Induced Vibration in Footbridges
Footbridges vibrate because the forces imparted by the user are applied with the frequency of the pace and movement, however small, is therefore a forced vibration. In instances where...

Buckling of Angles: State of the Art
A summary of the theoretical and experimental studies conducted to investigate the buckling of angle columns and beams is presented. The theoretical analyses for flexural, torsional-flexural...

Simplified P-Delta Analyses for Asymmetric Structures
Computer oriented and manual procedures are presented that enable a direct second order analysis of asymmetric building structures to be performed by means of first order formulation....

Bolted Connections Dynamically Loaded in Tension
A report of fatigue tests on tensile loaded bolted connections is presented. The tests clearly demonstrate that the structural design is of major importance with regard to the fatigue...

Ultimate Strength of Skew RC Box Girder Bridge
Analytical and experimental results obtained in a study of a large-scale 45° skew two span four cell reinforced concrete box girder bridge model are presented. The model, which was a 1:2.82...

External Pressure and Sectional Behavior of Fabricated Tubes
The effect of external hydrostatic pressure on the cross sectional behavior of fabricated tubular columns is studied analytically using tangent stiffness approach. The moment-curvature...

Structural Response of Skew RC Box Girder Bridge
Analytical and experimental results obtained in a study of a large-scale 45° skew two span four cell reinforced concrete box girder bridge model are presented. The model, which was a 1:2.82...

Bridge Rehabilitation: An Alternate Approach
The presentation of rehabilitation plans for bridge structures requires engineering analyses of various strengthening schemes. The use of scale models as an alternate approach to conceiving...

 

 

 

 

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