Dynamics of structures

The dynamic behavior of rigid-block structures resting on a rigid foundation subjected to horizontal harmonic excitation is examined. For slender structures, the nonlinear equation of motion is approximated by a piecewise linear equation. Using this approximation for an initially quiescent structure, safe or no-toppling and unsafe regions are identified in an excitation amplitude versus excitation frequency plane. Furthermore, several possible modes of steady-state response are detected, and analytical procedures are developed for determining the amplitudes of the predominant modes and for performing stability analyses. It is shown that the produced stability diagrams can be beneficial to assessing the toppling potential of a rigid-block structure under a given amplitude-frequency combination of harmonic excitation; in this manner the integration of the equation of motion is circumvented.

Closure of "Rocking of Rigid Blocks Due to Harmonic Shaking"

SynOptics Communications Inc.

Written by a leader on the subject, Introduction to Geotechnical Engineering is first introductory geotechnical engineering textbook to cover both saturated and unsaturated soil mechanics. Destined to become the next leading text in the field, this book presents a new approach to teaching the subject, based on fundamentals of unsaturated soils, and extending the description of applications of soil mechanics to a wide variety of topics. This groundbreaking work features a number of topics typically left out of undergraduate geotechnical courses.

Geotechnical Engineering: Unsaturated and Saturated Soils

Automatic detection of atrial fibrillation using stationary wavelet transform and support vector machine

Centrifuge modelling on seismic behaviour of stone architectural heritages

Reproduction of Piping Failure Due to the Permeable Layer Using Centrifuge Test

Evaluation of Rocking Mechanism for Embedded Shallow Foundation via Horizontal Slow Cyclic Tests

Comparative study of field seismic tests at a multi-layered model testing site

A two-level contention resolution scheme that consists of collision blocking (CB) and contention resolution (CR) is proposed for WDM networks with control channels. By having both CB and CR operations, the performance can be improved to be approximately equal to that of the complete CR while avoiding electronic bottleneck.

Dong-Soo Kim

Papers

Centrifuge modelling on seismic behaviour of stone architectural heritages

Reproduction of Piping Failure Due to the Permeable Layer Using Centrifuge Test

Evaluation of Rocking Mechanism for Embedded Shallow Foundation via Horizontal Slow Cyclic Tests

Comparative study of field seismic tests at a multi-layered model testing site

Two-level contention resolution scheme for WDM networks with control channels