ASCE Salary Survey 1991
The 21st biennial ASCE salary survey of the engineering profession conducted by the ASCE Committee on Employment Conditions during the first half of 1991 is presented. It consists of an...
Knowledge Acquisition in Civil Engineering
Expert systems are an intriguing approach for transferring valuable problem-solving skills from the minds of human experts to the logic of computer programs. For the past several years,...
Setting a National Research Agenda for the Civil Engineering Profession
Final Report
research...
Man and Huge System Interaction
In many cases of disaster, the causes of failure of huge systems are frequently attributed to human error. However human is liable to error. To exclude human factor from a huge system...
Identification of Critical Load Distributions for Wind Loading
For practical application as well as for sophisticated investigations, the time dependent stochastic wind process has to be simplified in terms of input data to the calculation. Usually,...
Optimal Distribution of Tuned Mass Dampers in Wind-Sensitive Structures
Modern high-rise buildings are susceptible to excessive accelerations at the upper floors in wind storms due to flexibility and low damping. In order to keep acceleration levels below...
Reliability of Bridges in Turbulent Wind
The present study investigates the stability of bridge motion by means of almost sure or sample stability criteria. An asymptotically exact approximation for the top Lyapunov exponent...
Wind Loads on Large Broadcasting Antennas: Records and Elaborations
Alternative estimations of the 50-year gust winds from the data available in typical Italian sites of broadcasting antennas are summarized and compared with the design winds suggested...
Reliability Analysis for Offshore Structures
This study presents the reliability analysis of an offshore structure. The mechanical model includes various elasto-plastic diagrams with and without the combination of the normal force...
Autocorrelation Functions for Offshore Geotechnical Data
Autocorrelation functions are described. Data from several North Sea sites are analyzed with respect to the vertical and horizontal autocorrelation of a number of soil properties. Based...
Stochastic Response of Ground and Its Implication for Spatial Variation of Earthquake Ground Motion
In order to account for the stochastic nature of free-field earthquake ground motions in the time and space domain, an engineering interpretation of frequency wave number representation...
Simulation of Seismic Damage of RC Structures in Eastern US
A normalized index for evaluation of structural damage was developed based on the relation of demand and capacity. The proposed formulation combines two sources of damage: permanent deformation...
Serviceability of San Francisco Auxiliary Water Supply System
A method is developed for estimating the seismic serviceability of water supply systems. The method can account for uncertainties in earthquake, mechanical properties of soil and pipelines,...
Graphical Demonstration of Serviceability Analysis
A graphical interactive computer program (GISALLE) has been developed using state of the art computer graphics to estimate the seismic performance of water supply systems. GISALLE is developed...
Earthquake Clustering in the Kanto District
Earthquakes in the Kanto district (Japan) between January 1983 and March 1987 are analysed for the identification of independent main shocks and for the hierarchical clustering of secondary...
Examples of System Optimization and Reliability in Bridge Design
The objective of this paper is to present examples of system optimization and reliability in bridge inelastic design. The optimum solution is defined as the bridge of least weight, subject...
Some Insight in Autoregressive (AR) Spectral Modeling
The difficulties associated with the determination of reliable autoregressive (AR) approximations of the Pierson-Moskowitz and Davenport spectra are examined from the standpoint of developing...
Structural Reliability Assessment Using Latin Hypercube Sampling
Many methods have been proposed for structural reliability assessment purposes, such as the First-Order Second-Moment Method, the Advanced Second-Moment Method, computer simulation, etc....
A Comparison of Different Mathematical Models for the Spatial Correlation of Distributed Excitation Forces
This paper contains an investigation of the transverse vibrations of EULER-BERNOULLI beams under longitudinal tension and random space-time loading. Using GREEN's function...
Experience in Model Adjustment by Parameter Estimation Methods
If the computational model is uncertain and if measured data of the system exist, system identification approaches lead to an improved computational model with known confidence. After...
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