Page No. Line No. Error. Correction 138 18 Comparison Compression 150 15 elasti-rigid elastic-rigid 167 1 Method Methods 167 15 technique techniques 172 36 AZVELANI ZEVELANI UNIVERSITY OF LONDON IMPERIAL COLLEGE OF SCIENCE AND TECHNOLOGY THE ELASTOPLASTIC ANALYSIS OF PIN-JOINTED SPATIAL STRUCTURES by Usama Rustom Madi A thesis submitted for the degree of Doctor of Philosophy in the Faculty of Engineering of the