2015/6/2 Different Types of inner tube systems Characteristic of frame tube In its simplest terms,a framed tube can be defined 向国田用向由回 oined by deep spandrelgirders. varying from about 0.90 to 1.5 m(3 to5f). Characteristics of frame tube Behavior:Shear Lag 30 Fame Behavior:Shear Lag 本课件版权归作者所有，仅供个人学习使用，请勿转载。 22015/6/2 2 Different Types of inner tube systems (a) Frame tube (b) Tube with cantilever slabs (c) Tube with bottom truss (e) braced tube (side or exterior braces) (d) Tube with top truss and hanging columns Characteristic of frame tube  In its simplest terms, a framed tube can be defined as a three-dimensional system that engages the entire building perimeter to resist lateral loads. A necessary requirement to create a wall-like three￾dimensional structure is to place columns on the building exterior relatively close to each other, joined by deep spandrel girders.  In practice, columns are placed 4m (10 ft) to as much as 6.1m (20 ft ) apart, with spandrel depths varying from about 0.90 to 1.5 m (3 to 5 ft ). Characteristics of frame tube Behavior : Shear Lag Behavior : Shear Lag Behavior : Shear Lag each successive interior column will experience a smaller deformation and hence a lower stress than the outer ones. 本课件版权归作者所有，仅供个人学习使用，请勿转载