An Ellipse-based Micromechanical Model for Angular Granular Materials
An ellipse-based two-dimensional Discrete Element algorithm for numerically modeling angular granular materials is developed and presented. Interparticle contact computations require the...
A Time-Dependent Microplane Model for Creep of Cohesive Soils
The microplane model is used in this paper to describe the time-dependent (creep) behavior of cohesive soils (clays). The constitutive equations are defined on each of a set of microplanes...
Distant Eyes
A remotely operated vehicle is a miniature unmanned submersible that contains lights, a video camera, other instrumentation, and motor thrusters to move it through the water. The operator,...
Risk Perception and Policy Preferences of Fire Chiefs: A Survey of Hazardous Materials Issues
This paper presents the results of a survey of Connecticut fire chiefs and discusses how their perceptions of risk affect their attitudes towards risk preparedness and risk management...
Issues in Developing Arizona's Hazmat Incident Reporting Program
The Arizona Division of Emergency Services (ADES), in cooperation with Arizona State University (ASU) - Center for Advanced Research in Transportation, and the Arizona Department of Transportation...
Field Instrumentation Program Vital to Deep Excavation Project
An extensive field instrumentation, monitoring and evaluation program was implemented for a seven-level deep excavation project in Boston. Using the observational approach, the information...
Three-Dimensional Nonlinear Study of Piles and Simplified Models
In a recent study the authors examined the effect of the nonlinear behavior of soil on the axial and lateral response of one or two piles due to monotonic and cyclic pseudodynamic loading...
Monte Carlo Simulations of the Dynamic Response of Pile Groups
A study is presented on the effect of variations of relevant parameters within a pile group on the vertical dynamic response of the group. These parameters include the shear wave velocity...
Geotechnical Engineering Design in the Age of the Modern Computer
Because geotechnical engineering requires that the materials and their configuration be investigated for each new project, the profession has always placed great emphasis on judgment....
Modification of
The response of piles in a rectangular group subjected to lateral loading has been analyzed using a three-dimensional finite element model to evaluate the effect of pile spacing on lateral...
Spatial Variation in Liquefaction Risk Assessment
Basic concepts and methods of random field theory, needed to characterize 'distributed disordered systems', are reviewed and applied to a soil liquefaction case...
Finite Element Analysis and Field Instrumentation of a Soil/Cement Arch
A two dimensional plane strain finite element analysis is used to predict the increase in stress on an existing tunnel caused by the addition of twelve feet of fill. The fill, soil/cement,...
Remote Sensing and the Coastal Management in Brazil
This paper intends to demonstrate the possibility of employing remote sensing techniques in the Brazilian Coastal Management Program (Programa Brasileiro de Gerenciamento Costeiro). It...
Aerial Videotape Mapping of Coastal Geomorphic Changes
An aerial geomorphic mapping system was developed to examine the spatial and temporal variability in the coastal geomorphology of Louisiana. Between 1984 and 1990 eleven sequential annual...
A Regional Approach to State Coastal Management
The Massachusetts Coastal Zone Management (MCZM) Program, which was federally approved thirteen years ago, has a long and impressive history of community, agency and legislative support....
Coastal Resources Management Planning and Implementation for the Fishery Sector Program of the Philippines
This paper explains the methods being used to plan for and implement a coastal resources management (CRM) component of the Fishery Sector Program (FSP) for the Philippines. The FSP, supported...
Model Comparisons of Harbor Wave Response
Physical and numerical model tests were conducted for an idealized, flat-bottom rectangular harbor, entrance channel, and nearshore bathymetry. Bathymetry of the entrance channel and offshore...
Environmental Monitoring Systems?A Case Story?The Great Belt
The law passed by the Danish Parliament on the construction of a combined bridge and tunnel across the 18 km wide Great Belt, included an environmental design criteria. This has initiated...
Marine Minerals Investigation in the Mid-Pacific Area; An Example of State and Federal Government Cooperation
For the past six years, representatives of the Federal government and the State of Hawaii have joined together to investigate marine cobalt-rich manganese crust occurrences in the U. S....
Geological Assessment of Offshore Sand Deposits
The United States Atlantic and Gulf of Mexico continental shelf contains large numbers of surficial sand deposits. The search for sand resources for metropolitan construction and coastal...
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