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Active Control of Structures with Soil-Structure Interaction
The objective of this paper is investigate the effect of soil flexibility on the performance of the active control system for seismic-excited buildings. By using the critical-mode control...

A Survey of Discrete Variable Optimization for Structural Design
Available methods for discrete variable structural optimization are reviewed. Methods are classified according to three categories: branch and bound, approximations using branch and bound,...

Boston's Sewage Outfall
The centerpiece of the Boston Harbor cleanup plan will be the sewage plant on Deer Island, which will treat water from 43 municipalities in the Boston metro area�500 mgd to start. In order...

Geographic Engineering Management System
The Memphis District Engineering Division is developing a GIS type data base as part of a Geographic Engineering Management System (GEMS) to assist both the District and the Lower Mississippi...

Remote Sensing for Seismic Hazard Assessment of a Proposed Nuclear Power Station, North Wales, UK
During the seismic hazard assessment for a proposed nuclear power station in North Wales, UK, a remote sensing study was carried out in conjunction with other, wide-ranging geological...

Establishing a Geographic Information System
The ultimate test of an advancement in civil engineering is the successful integration of aspects of the advance into the general engineering community. Success stories in this area include...

AI Development Environment for the Maintenance of Existing Buildings
A specific structural typology is considered with a deep expertise available on the subject. The 'state of health' of a single building is assessed by an expert...

Interaction of Elastic Waves with Axisymmetric Cavities in a Half Space: A Combined Finite Element-Boundary Integral Approach
A hybrid numerical method is presented to investigate the interaction of elastic waves with axisymmetric cavities on the surface of a half space. In this method the near field which consists...

Dynamic Responses of the Precision Segmented Reflector
This paper concerns a structural simulation effort aimed at studying dynamic responses of the Precision Segmented Reflector when subjected to seismic disturbances. The study results indicated...

Stochastic Seismic Response of Simple Structures
Since, at present, it is impossible to eliminate the various sources of uncertainty related to earthquake loading, it is necessary to better understand their effects on structural seismic...

Dynanmic Stability and Seismic Response of Damped Beams in the Presence of Follower Forces
The dynamic stability and the seismic response of general beams are examined, by discretizing the structure to a set of rigid bars, linked together by means of elastic constraints (Cells...

Effects on Seismic Spatial Variations to Suspension Bridge Responses
The dynamic soil-structure interaction effects and spatial variations of a seismic motion seem to have significant contributions on the response evaluation of a long span suspension bridge....

Comparative Time Domain Analysis of Some Available Analytical and Empirical Expressions for the Spatial Variability of Seismic Ground Motions
Simulations in space and time based on models for the spatial variability of seismic ground motions are generated. Displacement time histories are simulated through the spectral representation...

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...

Statistical Evaluation of CPT and DMT Measurements at the Heber Road Site
A series of field tests were conducted at several sites in the Imperial Valley, South California from 1983 to 1985. The field testing program included cone penetration, dilatometer, standard...

Penetration Testing for Groundwater Contaminants
Recent advances in penetration testing technology have produced a variety of new penetration devices to measure groundwater conditions. This paper describes two specially designed devices;...

Measurement of Subsurface, Deep Foundation and Slab/Subgrade Conditions with In Situ Seismic, Sonic and Vibration Methods
Case histories are presented to illustrate quality assurance and forensic applications of nondestructive testing and evaluation (NDT&E) methods for in situ investigation of subsurface...

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...

Foundation Evaluation of Barkley Dam for Seismic Analysis
An in-situ site investigation was performed at Barkley Dam, KY to gather essential information on the stratigraphy and nature of the foundation soils. From this information the site was...

 

 

 

 

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