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Heather Stanley recently became Managing Director of Yolles Partnership, the Canadian company, an unusual lead position for a woman in her mid-thirties in the construction industry. As Director of its first office in the UK since 1997, she is responsible for 22 staff. The post offered work on larger buildings and more management experience than her jobs to date. Kathy Stansfield
Dr S. B. Desai (F) (Department of the Environment, Transport & the Regions) You state, under eqn (8) of the paper, that the core will remain uncracked if the principal shear stress voldV does not exceed fct/3, where fct is the concrete tensile strength given by fct= 0.3(f'c)2/3. This implies that the shear strength is related to (fc)2/3. Although this relationship may agree with that given in EC 2, it tends to give unsafe results for higher values off,. BS 8110 relates concrete shear strength to the cube root of compressive strength, which is more realistic.
Bursting forces in columns are caused by cranked vertical reinforcement. Although these bursting forces are well documented, few Codes of Practice deal with the effects adequately. British, South African and American Codes are critically evaluated in this regard. An equation is developed to determine the amount of bursting steel required which is in the form of column ties. A finite element study and columns tests are carried out to evaluate the effects of the bursting forces and as a contribution to the design process. Recommendations are also given describing practical measures for design. M. Gohnert, C. Morris and K. Webber