241.3.3 Analysis of frames supporting vertical and lateral loads •Building frames two types: Braced framesUnbraced frames⎧⎨⎩oA braced frameis designed to resist vertical loadsonly (such as dead and imposed loads). oAn unbraced frameis designed to resist both vertical and horizontal (such as wind/earthquake) loads. Fig. 1.3-10 Multi-storey building. (a) Plan; (b) rigid transverse frame; (c) side elevation. •In most of tall buildings, structural walls (shear walls) and cores provide stability and resistance to lateral loads. In general, Shear walls and cores are considered to carry lateral loads mainly.frames are considered to carry vertical loads only (braced frames).⎧⎨⎩(c) diaphragm
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