Author: Johnson, R P;Smith, D G E
First published: N/A
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Johnson, R P;Smith, D G E
The authors have presented an interesting method for the rapid estimation of maximum bending moments in decks of suspension bridges. Their approximate analysis draws to a
logical conclusion the more general method described by Bowen and Charlton (reference 3 of the paper). It is clear that the use of symmetry and antisymmetry offers a considerable computational advantage :two sets of three linear simultaneous equations are solved far more quickly than one set of six.
F. Van der Woude, M.S. Gregory and H.I.A. Hegab
The energy required to make, transport and erect the most common structural materials is tabulated, together with the energy to make unit areas of several building elements. An energy audit is carried out for 12 different layouts of basic structure including reinforced concrete, structural steel and loadbearing brickwork. Similar calculations for ll elevations of cladding suitable for use with the selected structures are also given. Where appropriate, the results for different elevations and structures are combined to give figures for total structure. To avoid the possibility of misleading conclusions. similar results are presented for the running energy required for the elevations considered. Conclusions are drawn concerning the lowest amount of energy required to build internal structures, elevations, and total structures.
We think it possible that some members who were on holiday when the July issue arrived may have set it on one side for future scrutiny and so have missed the letter from Mr. A. C. Clarke (F) about welded fabric reinforcement. We feel justified in repeating our request for information from those members who have first hand knowledge and ask those
who may not have read it to do so now.