Method for approximate analysis of cracking effect on lateral stiffness of reinforced concrete framed-tube structures

The paper presents analysis of framed-tube of tall reinforced concrete buildings subjected to horizontal loads. Authors take a cracking effect of frame spandrel girders of structure into account. Paper introduces simplified theoretical model of work of this kind of structures. The theoretical analysis and statistical multi-parameter numerical study of various framed-tube structures became the basis for developing a simplified assessment method of effective inertia moments of cracked spandrel beams.