Shear and Anchorage Behaviour of Fire Exposed Hollow Core Slabs

摘要: Hollow core (HC) slabs are made of precast concrete with pretensioned strands. These popular as floor structures in offices and housing. At ambient conditions, the load bearing capacity can be dominated by four different failure modes, i.e. flexure, anchorage, shear compression tension. As economic production process does not allow for inclusion mild reinforcement, rely on tensile strength anchorage capacity. When exposed to a fire, HC have maintain their separating function certain time order facilitate fire fighting actions provide sufficient users building escape rescue teams search building. Current design codes consider only flexural failure, while tests carried out past showed that other modes dominate behaviour well. result, might overestimate actual performance slabs. However, experiments represent worst case compared practice. least, fatalities caused premature collapse slabs, never been reported up author's knowledge. Because there is lack fundamental understanding behaviour, an optimum between safety economics yet achieved. The objective research presented this thesis gain basic develop FE models predict behaviour. With models, measures improve evaluated. field application limited accordance European product standard prEN 1168 [1197], conditions simply supported rigid supports like walls. results safe side restraining support conditions.