# Screen Breakwaters

*The diffraction of water waves by an offshore breakwater consisting of an infinite row of equally-spaced vertical screens is investigated theoretically. The reflected and transmitted wave...*

Computation of Wind Pressures on L-Shaped Buildings

*The paper refers to the numerical simulation of turbulent wind conditions around an arbitrarily-shaped building composed of two rectangular blocks. The time-averaged Navier-Stokes equations...*

Improved Time-History Analysis for Structural Dynamics Calculations

*Methods are developed to reduce the computational effort in time-history analysis of nonlinear structures. The methods permit use of much larger time intervals than are possible in conventional...*

Free Vibration Analysis of Asymmetric Buildings

*A simple procedure for free vibration analysis of asymmetric buildings is presented. This method assumes that each floor is a rigid diaphragm with three degrees of freedom (two lateral...*

Wave Propagation in a Nonlocal Strain-Softening Continuum

*The problem of wave propagation in a nonlocal strain softening solid is first discussed analytically. It is demonstrated that 'loading' waves can still propagate in the strain softening...*

Analog Electronic Simulations of a Nonlinear System

*We perform electronic analog simulations of a harmonically forced Duffing oscillator. The addition of noise perturbations of sufficient intensity is shown to induce transitions between...*

A Sphere Moving Down an Inclined Bumpy Surface

*A sphere moving down a bumpy incline in the air is studied theoretically and experimentally. A method based on the principle of energy conservation is used to express the average velocity...*

Structural Control Under Stochastic Seismic Loads

*This paper presents a method of controlling nonlinear and hysteretic civil engineering structures subjected to stochastic earthquake ground excitations. Emphasis is placed on control of...*

Roll-Waves on a Non-Newtonian Mud Layer

*This article extends the theory of roll-waves due to Dressler (1949) to a thin layer of mud modeled as a power law fluid. Roll-waves are periodic bores moving at a constant velocity down...*

Inflation Instability of Cylindrical Membranes

*A new procedure which investigates inflation instability of cylindrical nonlinear membranes is developed. The general characteristics of inflation instability are described. An efficient...*

Investigation of Parametrically-Induced Excitation in Concrete Columns

*A mathematical model is developed which accounts for the non-linear material characteristic of concrete members. The axial and transverse motions of concrete columns, are found to be second-order...*

Minimal Storage Finite Element Solution of Large-Scale Three-Dimensional Elastodynamic Problems

Tripod Crane Concept for Lunar Surface Construction

*A construction scheme using three integrated cranes is proposed. Mikulas proposed a lunar crane concept which introduces a set of three cables in order to stabilize the payload. This paper...*

Tide and Hurricane Storm Surge Computations for the Western North Atlantic and Gulf of Mexico

*The development of a finite element (FE) model to study tides and hurricane storm surge in the Western North Atlantic and Gulf of Mexico is discussed. Issues that are emphasized include...*

Approximation of Convective Processes by Cyclic AOI Methods

*Convective or advective processes play a role in many models for civil engineering applications. For example in transport equations, in hydrodynamic equations or wave energy equations....*

Linearisation and Offshore Fatigue Reliability

*In determining the force effects due to wave action on offshore structures it is conventional to use an equivalent linearisation to convert wave velocities to forces via Morison's equation....*

Asymptotic Importance Sampling

*One of the main issues in reliability analysis is the accurate and efficient calculation of the multivariate reliability integral. The Asymptotic Importance Sampling Technique (AIS) selects...*

Pre-Envelope Covariance Differential Equations

*The problem of predicting the safety of structural systems subjected to random loading arises in may engineering applications. In this framework the envelope process plays an important...*

Experiences with Experimental Design Schemes for Failure Surface Estimation and Reliability

*When using FORM and SORM to predict the probability of failure for a structural component a model for the failure function has to exist. For certain structural components a mechanical...*

Digital Simulation of Wind Load Effects

*The time domain solution of the equations of motion of structures subjected to a stochastic wind field is often obtained by a step-by-step integration approach. The loading is often described...*

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