Chapter 1 Tall Building Instruction to Tall Buildings Structures 1.1 Definition of tall buildings 1.2 Development of tall buildings Haibei XIONG 1.4 The structural characteristics of tall xionghaibei@tonqji.edu.cn buildings 1.1 Definition of tall buildings The Development of Tall Buildings 30 meters? 8 ,>393 It is difficult to distinguish the charactoris Ia bu BUT.. 》@回 1.1 Definition of tall buildings The Characteristics of Tall Buildings From the structural design point of view s he heohtatcraores begin to 本课件版权归作者所有，仅供个人学习使用，请勿转载。 1 1 Tall Building Structures Haibei XIONG xionghaibei@tongji.edu.cn 1.1 Definition of tall buildings 1.2 Development of tall buildings 1.3 Development of structural systems of tall buildings 1.4 The structural characteristics of tall buildings Chapter 1 Instruction to Tall Buildings 1.1 Definition of tall buildings It is difficult to distinguish the characteristics of a building which categorize it as “tall”. tall ? 8 stories? 30 meters? 100 meters? BUT…  The Development of Tall Buildings  Definition: China，>100 meters America，>152 meters (500 ft) United Nations，>40 storeys (100 meters) Design technical distinguish degrees The object of our study should have the following characteristics: Identification on the building height The sample size is integrity CTBUH，>300 meters (Supertall Buildings) Charles H. Thornton ， Famous American structural engineer，>393 meters (1200 ft) Over 250m 1.1 Definition of tall buildings It is simpler to consider a building as tall when its structural analyses and design are in some way affected by the lateral loads, particularly the drift/sway caused by such loads. As the height increases, the lateral forces begin to dominantly control the building’s performances.. For example, under a uniform wind load the overturning moment at the base varies in proportion to the square of the height of the building, while the lateral deflection varies in proportion to the fourth power of the height . From the structural design point of view  The Characteristics of Tall Buildings  A. The horizontal loads is decisive ；  B. Dynamic response can not be under estimated；  C. The axial deformation, shear deformation, and the effect of temperature, settlement increase；  D. The amount of material, construction cost was a parabolic relationship between growth。 The height and axial force, bending moment, lateral relationship of high-rise building 本课件版权归作者所有，仅供个人学习使用，请勿转载