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The President: You mention in the paper that there is quite a range of strengths I think between 100-800 M N/,m2. Would you like to say something about the reasons? Is it the proportion of the glass fibres or is the size of the fibres?
The paper presents non - dimensional design charts which allow the estimation of the critical loads of sets of interbraced compression members and also the strength requirements of the braces. The charts summarise the results of computations made on structures comprising up to six compression members in parallel linked by up to twelve lines of braces. Both uniform and'parabolic' axial force distributions within the column length are considered. The analytical procedure used is a normal stiffness matrix formulation using stability functions to incorporate the weakening effect of axial compression.
The President: Once in every four years we have the Olympic Games and whatever arguments and difficulties the Olympic movement may go through, it presents to the engineering world an opportunity to undertake structures of a magnitude and complexity which does not occur on any other occasion. There are a handful of engineers who are lucky enough and able enough to be chosen as consulting engineers for these projects.