Browsing Publications by Issue Date
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Digital Simulation of Seismic Ground Motion
(1987)The method of spectral representation for univariate, onedimensional, stationary stochastic processes and multidimensional, univariate (as well as multidimensional, multivariate) homogeneous stochastic fields has ... 
Horizontal Impedances for Radially Inhomogeneous Viscoelastic Soil Layers
(1987)A study of the dynamic impedances of horizontally excited, radially inhomogeneous, infinite viscoelastic soil layers with a circular hole, and of piles embedded in a medium represented by such layers is made considering ... 
Report on the WhittierNarrows, California, Earthquake of October 1,1987
(1987)An abbreviated report of the findings of a postearthquake reconnaissance team from the National Center for Earthquake Engineering Research. Surveys structural behavior and policy issues. 
Seismic Probabilistic Risk Assessment and Seismic Margins Studies for Nuclear Power Plants
(1987)This report presents a review of the seismic probabilistic risk assessment and seismic margin studies for nuclear power plants in the United States. The techniques employed in these studies are briefly described. A few ... 
Symbolic Manipulation Program (SMP) Algebraic Codes for Two and Three Dimensional Finite Element Formulations
(1987)A computer algebra package entitled the Symbolic Manipulation Program (SMP) has been briefly reviewed. Its capabilities of handling the Finite Element Method (FEM) and Matrix Structure Analysis (MSA) are studied. The ... 
Vertical and Torsional Impedances for Radially Inhomogeneous Viscoelastic Soil Layers
(1987)A study of the dynamic impedances of thin, infinite viscoelastic soil layers with a circular hole is made considering a continuous, ramplike variation for the shear modulus of the material. Both vertically and torsionally ... 
Frequency Response of Secondary Systems Under Seismic Excitation
(1987)The main objective of this report is to investigate how the componentmode procedure can be utilized to full advantage by including the smallest number of normal modes of the primary system in the analysis while still ... 
FirstYear Program in Research, Education and Technology Transfer
(1987)The goal of the National Center for Earthquake Engineering Research (NCEER) is to coordinate a team effort in the study of earthquake engineering which will substantially enhance the stateoftheart. Current activities ... 
A Nonstationary Solution in Random Vibration Theory
(1987)An approximate Markov process for a function of the system response of a class of lightly damped, nonlinear random vibration problems is derived using the method of stochastic averaging. The solution of the associated ... 
Experimental Evaluation of Instantaneous Optimal Algorithms for Structural Control
(1987)In a continuing effort to determine the feasibility of applying optimal control to building structures, a comprehensive experimental study was carried out using a standardized structural model under base excitation supplied ... 
Parametric Studies of Frequency Response of Secondary Systems Under GroundAcceleration Excitations
(1987)Numerical investigation is carried out into the variation of frequency response to ground acceleration of a singledegreeoffreedom secondary system due to variations of system parameters. Selected system parameters include ... 
Modelling Earthquake Ground Motions in Seismically Active Regions Using Parametric Time Series Methods
(1987)The application of the AutoregressiveMoving Average (ARMA) process is an efficient method to model strong motion accelerograms, after processing by a variance and frequency stabilizing transformation. This report presents ... 
Vertical and Torsional Vibration of Foundations in Inhomogeneous Media
(1987)A study of the dynamic impedances for a radially inhomogeneous infinite viscoelastic layer with a circular hole, and for piles embedded in a medium represented by such layers is made. Systems in vertical and torsional modes ... 
Design of a Modular Program for Transient Nonlinear Analysis of Large 3D Building Structures
(1987)This report describes the plans for a computer modeling and analysis system for transient fully nonlinear seismic analysis of large buildings. The emphasis is on modeling the buildings at a "macro" level, i.e., ... 
Detection and Assessment of Seismic Structural Damage
(1987)The problem of earthquake damage assessment is defined. The role of the analysis of strong motion records in damage assessment codes based on expert system is pointed out. A literature survey on damage assessment and ... 
Instantaneous Optimal Control Laws for Tall Buildings Under Seismic Excitations
(1987)A critical review of classical optimal control algorithms is made with respect to the specific application of structural control under seismic loads. With the earthquake ground acceleration being the major source of ... 
Active Structural Control in Civil Engineering
(1987)The objective of this paper is to provide a stateoftheart assessment of active control research as applied to civil engineering structures. An attempt is made to present it with less specialized research content suitable ... 
Practical Considerations for Structural Control: System Uncertainty, System Time Delay and Truncation of Small Control Forces
(1987)For practical application of structural control system, various important factors should be considered, including the system time delay, uncertainty in structural identification, truncation of small control forces, etc. A ... 
Modal Analysis of Nonclassically Damped Structural Systems Using Canonical Transformation
(1987)An alternate modal decomposition method for dynamic analysis of nonclassically damped structural systems is presented. The resulting decoupled equations contain only real parameters. Hence, the solution can be obtained ... 
Seismic Damage Assessment of Reinforced Concrete Members
(1987)This report starts with a fundamental discussion of damage, which reinforced concrete members sustain under large inelastic cyclic loads similar to those experienced during a severe earthquake. A large number of damage ...