Effect of Spatial Variation of Ground Motions on Bridges
The effect of spatial variation of ground motions on the response of a two-span bridge is presented. Perfectly and partially correlated earthquake ground motions are used as input motions...
Recursive Modeling of Dynamic Response of MDOF Systems
The dynamic response of multi-degree-of-freedom (MDOF) systems to correlated multi-input random excitations utilizing recursive modeling is presented. The recursive model is formulated...
Stochastic System Identification in Structural Dynamics
Recently, new identification methods have been developed by using the concept of optimal-recursive filtering and stochastic approximation. These methods, known as stochastic identification,...
Statistical Analysis of Occupant Dynamic Loads
Human-induced load-time histories were modeled by several dependent descriptive parameters. These parameters were treated as functions of two independent variables in a multivariate regression...
On Modelling the Nonlinear Relationship Between Random Fields by Means of Higher-Order Spectra
This paper addresses the input-output relationship of nonlinear systems that may be expressed in terms of a hierarchy of linear, quadratic and higher-order transfer functions or corresponding...
Stochastic Properties of Wind Spectra
In the first part of this paper the correlation function of measured wind spectra is compared with theoretical correlation models assuming a stationary wind process. This comparison indicates...
Pressures on Prisms in Turbulent Shear Flows
Experimental results are presented which show that Melbourne's 'Small Scale Spectral Density Parameter,' S, controls the negative pressures on the...
Dynamic Response of Tall Buildings to Wind Loads
The purpose of this study is to perform a probabilistic analysis of tall buildings subjected to wind excitation. A time domain simulation is first applied to the nonlinear problem. After...
Endochronic Theory and Non-Llinear Stochastic Dynamics of 3-D Frames
Analytical continuous expressions of the material constitutive law are required by equivalent linearization techniques in nonlinear stochastic dynamics. Extensions to study 3D frames,...
Response of Two-Span Beam to Spatially Varying Earthquake Excitation
The effect of the spatial variation of strong ground motion should be considered in the analysis and design of large structures such as bridges, lifelines, dams, etc. The stochastic response...
A Tower-Like Structure with Distributed Stiffness, Mass and Plastic Zones Under Random Earthquake Loading
Random vibrations of an elastoplastic structure are treated by taking into account the finite spread of plastic zones as well as the effects of distributed mass and stiffness. Solution...
Probabilistic Structural Response of a Turbopump Blade to Random Pulse Loading
The objective of this work is to develop probabilistic models of the response of a Space Shuttle Main Engine (SSME) turbopump blade to random impact loading. These loads are caused by...
A Probabilistic Comparative Study of Various Base Isolation Systems?Nonstationary Earthquake Excitation
A probabilistic comparative study of various base isolation systems is carried out. The laminated rubber bearing with and without lead plug, the resilient-friction, and the EDF base isolation...
Reliability of Daniels-Systems Oscillators Including Dynamic Redistribution
The reliability of redundant systems under stationary Gaussian white noise excitation is investigated with emphasis on the dynamics of redistribution of internal forces after brittle failure...
Effect of Air Gap on Platform Reliability
A simplified reliability study of the effect of lateral wave forces impacting the deck of a fixed platform is presented. The reliability of the deck legs, considered the primary resistance...
Rainflow Cycles in Nonstationary Gaussian Processes
This paper develops a methodology for calculating the probability distribution for rainflow cycles in a nonstationary Gaussian process. The up- and downcrossing rates are estimated for...
Sanitary Sewer Model with Database Management
While numerous water supply and stormwater system models existed, the few sanitary sewer models that were readily available were too simplistic for engineering design and master planning...
Sanitary Sewer System Modeling for Operation and Planning
Development of a Steady State Sanitary Sewer Simulation (S5) computer model helped Newport News, Virginia, enact an efficient sanitary sewer management...
Conjunctive Use Study of Groundwater and Surface Water in Chino Basin, California
The purpose of this paper is to study the effects of artificial recharge on an already contaminated unconfined aquifer and propose optimal recharging and pumping schemes to prevent the...
Regional Assessment of Pumpage in Southeastern Virginia
A U.S. Geological Survey investigation was conducted, in cooperation with the Virginia Water Control Board, to analyze the hydrogeology and groundwater flow system in the Coastal Plain...
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