The effects of protected beams and their connections on the fire resistance of composite buildings

摘要: Abstract According to full-scale fire tests, it is noticed that tensile membrane action within the concrete floor slabs plays an important role in affecting resistance of composite buildings. It well known development actions relies on vertical support along edges slab panel. However, there at present a lack research into influence supports slabs. In this paper, performances generic three dimensional 45 m×45 m subjected ISO834 Fire and Natural are investigated. Different conditions steel meshes applied order assess impact Unlike other existing large scale modelling which assumes connections behave as pinned or rigid for simplicity, two robust 2-node connection element models developed by authors used model behaviour end-plate partial structures under conditions. The 3D taken consideration. load-transfer mechanisms when fail due axial tension, shear bending Based results obtained, some design recommendations proposed enhance