TALL BUILDING STRUCTURES TONGI UNIVERSITY The Bocom Financial Towers is multi-tower high-rise building with frame tube system. The general characteristics of this kind of buildings are: .Can be used in tall buildings Inner tube.Outer frame. Large space,convenient to use .Flexible arrangement of building's elevation .Good natural lighting Commonly used in:hotel,office buildings The materials used are steel and glass Load-carrying features of frame-tube structures: Great lateral stiffness Elevator can be used as inner core tube to resist shear and bending Frame columns are arranged on the outer side to resist bending Displacement limitations of frame-tube structure: ·RCwall Maximum value of elastic story drift rotation<1/1000 Maximum value of elasto-plastic story drift rotation<1/120 SEISMIC MODEL TEST AND ANALYSIS OF MULTI-TOWER HIGH-RISE BUILDINGS.Wensheng LU And Xilin LU A scaled multi-tower high-rise building model of the BOCOM Financial Tower was tested in The multi-tower buildine is two odium o coniunction parts at diffe ent lev vels.It is well known that the podium and conjunction parts shall be designed very carefully to meet the internal force and the deformation between towers. From the point of structural properties,multi-tower high-rise buildings have the following characteristics, the height ex eeding the limitation o sen odes nd al the distribution of mass and lateral stiffness are sharply changed along the height; mega-member with huge space and large span; flexible weak connection between towers: new construction materials,methods and details. Rodrigo Martinez Arribas TALL BUILDING STRUCTURES TONGI UNIVERSITY Rodrigo Martínez Arribas The Bocom Financial Towers is multi-tower high-rise building with frame tube system. The general characteristics of this kind of buildings are:  Can be used in tall buildings  Inner tube. Outer frame.  Large space, convenient to use  Flexible arrangement of building’s elevation  Good natural lighting.  Commonly used in: hotel, office buildings The materials used are steel and glass. Load-carrying features of frame-tube structures:  Great lateral stiffness  Elevator can be used as inner core tube to resist shear and bending  Frame columns are arranged on the outer side to resist bending Displacement limitations of frame-tube structure:  RC wall  Maximum value of elastic story drift rotation < 1/1000  Maximum value of elasto-plastic story drift rotation < 1/120 SEISMIC MODEL TEST AND ANALYSIS OF MULTI-TOWER HIGH-RISE BUILDINGS. Wensheng LU And Xilin LU A scaled multi-tower high-rise building model of the BOCOM Financial Tower was tested in 2000 on the shaking table which locates at the State Key Laboratory for Disaster Reduction in Civil Engineering of Tongji University, Shanghai, China. The multi-tower building is two or more towers connected with one large podium or conjunction parts at different levels. It is well known that the podium and conjunction parts shall be designed very carefully to meet the internal force and the deformation between towers. From the point of structural properties, multi-tower high-rise buildings have the following characteristics, • the height exceeding the limitation of present codes; • extremely irregular shape, including in plan and elevation; • the distribution of mass and lateral stiffness are sharply changed along the height; • mega-member with huge space and large span; • flexible weak connection between towers; • new construction materials, methods and details