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The Structural Engineer, Volume 69, Issue 15, 1991
One of the main problems in assessing the structural response of RC elements during fire is the non-linear temperature profiles through the depth of exposed elements, leading to a non-linear distribution of strains which violates the principle 'plane cross-sections remain plane'. To fulfil the planeity of cross-sections under fire conditions, self-generating self equilibrating stresses are developed, arising from the self-restraint of the cross-sections. As a consequence, and disregarding the side-effects of possible internal microcracking, an 'effective' temperature profile should be determined, resulting in a reduced effective imposed curvature and a reduced axial deformation of the element. T.P. Tassios and M.P. Chronopoulos
Concrete flat slabs are a popular form of flooring system used for a wide range of buildings such as offices, warehouses and carparks, since they provide large, uninterrupted floor areas with no downstand beams within a minimum construction depth. In flat slab construction without beams, two problems have to be avoided: (1) large deflections at service loads and (2) punching shear failures at column-slab connections. This note is concerned with the second of these problems. Deflections in flat slabs will be the subject of a subsequent technical note. P.S. Chana
Sandwich panels fabricated by attaching facing plates to a folded-plate, directional stiffening core and penetrated by holes present a difficult analytical problem which can be solved by the use of large finite element packages. K.H. Tan and Professor P. Montague