Author: George, P D
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George, P D
An analysis of coupled shear walls is developed which models planar coupled shear walls as a system of interconnected discrete structural elements. The analysis is based on the force approach, using as redundants the shear forces at the contraflexural points of the connecting beams. The redundant shears are determined by enforcement of compatibility of deformation on pairs of adjacent connecting beams. The resulting formulation is shown to be computationally advantageous for linear elastic static and dynamic analysis of coupled walls. The use of beam shears is shown to be particularly convenient for elasto-plastic analysis, with a perfectly elastic/perfectly plastic yield criterion, since the number of redundants progressively decreases as the analysis proceeds. The effectiveness and efficiency of the approach are demonstrated by application to an example for which solutions are available from a number of established alternative methods. D. Johnson and B.S. Choo
The events of mid-September taught us yet again two maxims to guide a British politician. As John Major watched his personal crusade against devaluation crumble about him in a few days, did he recall both: ‘A week is a long time in politics’ from Harold Wilson?; and ‘Market forces must be allowed to work’ from Margaret Thatcher? Perhaps he also recalled a third, older maxim: ‘Those who ignore history are condemned to relive it’. Sir Alistair Morton
Introduction: Part 3 The 1992 examination was attempted by 1065 candidates, a decrease of 45 on last year’s figure. The overall pass-rate of 38.2 % was down 1.1% compared with last year, and it remains disappointing to see the pass-rate below the 40 Yo mark. The total number of UK candidates was 674, of whom 292 passed, a passrate of 43.3%, slightly down compared to last year. The total number of overseas candidates was 399, an increase of 41, of whom 117 passed, a pass-rate of 29.3 %, a slight increase compared to last year.