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Optical Performance Predictions and Testing of a Composite Reflector
This paper describes the structural analysis and the experimental performance evaluation of advanced composite mirror designs for future NASA astrophysics missions. An interdisciplinary...

Buckling Loads of Columns Made of Viscoelastic Materials
This is about the developing of relationships for predicting the change of buckling loads of columns made of viscoelastic materials under different loads. When a columnlike structural...

A Second Order Analysis Technique for Nonprismatic Bridge Piers
An approximate second order method is presented for the analysis and design of cantilever compression members. Prismatic members with nonconstant reinforcement, and nonprismatic members...

Analysis of a CMC Compact Tension Specimen
A cohesive force model is applied to study the stability of fiber failure in a ceramic matrix composite compact tension specimen. By controlling the length of the bridged crack results...

Postbuckling Analysis of Composite Stiffeners under Uniaxial Compression
This paper presents an analytical and experimental study conducted for postbuckling of I-section stiffeners. A stability analysis was carried out to determine postbuckling response of...

Foundation Investigations of Concrete Dams
This paper discusses a series of foundation investigations conducted on concrete dams by Pacific Gas and Electric Company. The paper focuses on investigative techniques, equipment, appropriate...

History of Lysimeter Design and Effects of Environmental Disturbances
A brief history of developments in lysimeter design is indicated. Disturbances introduced by the measurement system on the surrounding environment are discussed. The use of weighing lysimeters...

Floating Fabric Over Georgia Dome
The 400,000 sq ft free-span roof cover the new $210 million Georgia Dome may look as festive as a circus tent. But next fall, when the 70,500-seat arena becomes the home of the Atlanta...

Concrete Mixture Evaluation and Acceptance for Air Field Pavements
Evaluation of the strength of portland cement concrete using flexural strength and compressive strength tests is examined. Problems with the use of flexural testing in the field are discussed...

Tension Leg Platform Response to Drag Forces by Equivalent Stochastic Quadratization
An equivalent stochastic 'quadratization' method is described for performing nonlinear stochastic response analyses of offshore platforms subject to wave and...

A Continuous Damage Index for Seismic Reliability Assessment of Structural Steel Elements
Based on experimental investigations using steel plate elements subjected to cyclic axial loading, a continuous damage and/or deteriorating process is examined. In order to describe intermediate...

Redundancy of Multistate Structural Systems
In the theory of structural reliability it is often assumed that the system and its members can have two performance or damage levels ie. they can either be functioning or failed. It is...

Higher Moments Descriptions of Uncertain Quantities in the Analysis of Structural Components
Maximum-entropy and asymptotic models for probability densities with application to the uncertain behavior of a structural component are considered. In particular, they are studied with...

Reliability of Steel Columns Subjected to Buckling?Comparison of International Standard Codes of Design
Standard codes of design represent the phenomenon of buckling by means of a curve taking into account random structural imperfections. The author suggests a probabilistic method to evaluate...

Bayesian Reliability Analysis of Structures with Multiple Components
This study develops a method of Bayesian reliability analysis to establish an optimal inspection schedule of structures with multiple components using the data collected during inservice...

Concepts in Prototype Testing for In Situ Geomechanical Investigations at Yucca Mountain
Geomechanical investigations comprise a significant portion of the site characterization program to be conducted at Yucca Mountain, the site of a proposed repository for nuclear waste....

Unusual Spacecraft Materials
For particularly innovative space exploration missions, unusual requirements are levied on the structural components of the spacecraft. In many cases, the preferred solution is the utilization...

Reliability Estimation for Vertical Lift Gate at Emsworth Dam
The lift gates are composed of two horizontal trusses, two vertical girders, seven diaphragms, and two end frames. A critical element in the structural integrity of the lift gate is a...

Application of Weakly Compressible Flow Method to 2-D Open Channel Flows
The depth averaged equations for open channel flows are shown to be similar to that of the weakly compressible flows. The finite volume scheme developed for weakly compressible flows has...

Long-Term Strength Gain or High Strength Concrete as Monitored by Drilled Cores
An evaluation was made of the relationship between standard cylinders, four-inch by eight-inch cylinders, and drilled cores. The evaluation results showed that the strengths obtained from...

 

 

 

 

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