MINLP and MILP Strategies for Discrete Sizing Structural Optimization Problems
We address an important practical problem of optimum structural design in the presence of discrete sizing constraints. In addition, the topology of the structure may vary as well. The...
Structural Shape Optimization: An Implementable Algorithm
A computational algorithm for optimal shape design of linearly elastic structures is presented. For this problem continuum as well as discrete formulations have been developed and analyzed...
Damage-Tolerant Design of Deterministic and Nondeterministic Structural Systems
Many structures are exposed to very hazardous environments and they are likely to be damaged during their lifetime. Damage occurrence may cause a dramatic reduction in the safety of structural...
Simultaneous Design and Location of Actuators
A chance constrained model for determining optimal dynamic control parameters for structures subjected to probabilistic forcing amplitudes is presented. Optimal feedback control parameters...
Optimization of RC Frames with Reliability Concepts
Analysis and design optimization are considered simultaneously for reinforced concrete frames. Global displacements were considered as design variables. The nonlinear behavior of the elements...
Structural Optimization to Limit Natural Periods
It is necessary to limit the natural periods of some structures to control their response to dynamic loads. Floor systems with natural periods greater than approximately 0.15 seconds may...
Benchmark Problems for Shape Optimization in Plane Stress or Strain
The purpose of this paper is to bring to the attention of engineers and researchers who are working with finite element shape optimization techniques, the closed-form solutions for a unique...
Stiffness Optimization Methods for Lateral Systems of Buildings: A Theoretical Basis
The sizing of the members of the lateral resistance system for multi-story buildings is often controlled by stiffness requirements. In order to achieve economical buildings, it is important...
An Analysis Procedure for Cable Structures Using an Isoparametric Finite Element
The computer modeling and analysis of cable structures creates a major problem for the analyst in that the geometry of the cables is dependent on analysis results. The purpose of this...
A Regional Mapping Procedure for Finite Element Mesh Design
The paper summarizes our recent work in the development of practical algorithms for the automated mesh design in finite element stress analysis. A regional mixed mesh improvement procedure...
Column Buckling Mode Classification Using a Back Propagation Neural Network
A back propagation neural network (Rumelhart, Hinton and Williams, 1986) is used to analyze and classify the buckling mode shapes of structural columns. The input patterns consist of vectors...
Finite Element Analysis and Design of Plywood Shear Walls
An integrated procedure for the analysis and design of rectangular plywood shear walls is presented and illustrated. The analysis is done using an in-house finite element program with...
A Parallel Fron Large-Scale Stris
A methodology for large-scale structural analysis using a parallel frontal solution algorithm is developed and implemented on the Alliant FX/80 Multiple Instructions Multiple Data (MIMD)...
Parallel Preconditioned Conjugate Gradient Methods for Structural Analysis Problems with Multiple Loadings
This paper describes the use of conjugate gradient method for finite element problems with multiple loading cases. Specifically, we introduce a modified conjugate gradient method for the...
A GIS for the Louisiana Coastal Zone
The U. S. Army Engineer District, New Orleans is responsible for collecting, interpreting, and publishing large amounts of data related to engineering geology, subsidence, and land loss...
GIS Applications Floodplain Reconnaissance Studies
U.S. Army Engineer District, New Orleans (NOD) employed a Geographic Information System (GIS) to support a flood plain management Reconnaissance Study. The study region encompassed the...
Integration of SCADA and GIS Technologies in Jefferson Parish, Louisiana
Due to its physiographic setting in the delta region of the Mississippi River, a majority of the inhabited lands in Jefferson Parish, Louisiana are below local mean sea level and much...
Analysis of Thermal Scanning Imagery to Investigate Point Inflows Into Surface Water Bodies
Using a modified technique of thermal infrared remote sensing, physical sampling, and data analysis (graphical and geostatistical) locating a small inflow to a lake was possible. Thermal...
Municipal GIS Applications Utilizing Vector and Raster Software on Personal Computers
Confronted by increasingly tight budgetary constraints, combined with the expensive computer processing hardware typically required by a GIS, smaller engineering firms and local governments...
Low Stream Flow Frequency Analysis with Ordinary and Tobit Regression
In order to estimate the low-flow quantiles at ungaged sites, it is necessary to estimate low-flow quantiles at gaged sites. Two linear regression methods, denoted NR and NE, are compared...
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