scholarly journals Comparative Evaluation of Structural Systems for Tapered Tall Buildings

Buildings ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 108
Author(s):  
Kyoung Moon
Keyword(s):  
Structural Design ◽  
Comparative Evaluation ◽  
Building Materials ◽  
Tall Buildings ◽  
Structural Systems ◽  
Lateral Stiffness ◽  
Design Studies ◽  
Structural Efficiency ◽  
Aspect Ratios ◽  
Enormous Amount

Structural efficiency of tapered tall buildings has been well recognized, and many tall buildings of tapered forms have been built throughout the world. Tall buildings are built with an enormous amount of building materials. As one of the most efficient structural forms for tall buildings, the contribution of tapered forms to saving structural materials coming from our limited natural resources could be significant. Structural design of tall buildings is generally governed by lateral stiffness rather than strength. This paper systematically studies the structural efficiency of tapered tall buildings in terms of lateral stiffness. Tall buildings of various heights and angles of taper are designed with different structural systems prevalently used for today’s tall buildings, such as diagrids, braced tubes, and core-outrigger systems. The heights of the studied buildings range from 60 to 100 stories, and the corresponding height-to-width aspect ratios in their non-tapered prismatic forms range from 6.5 to 10.8. The angles of taper studied are 1, 2, and 3 degrees. Gross floor area of each building of the same story height is maintained to be the same regardless of the different angles of taper. Based on design studies, comparative evaluation of the various structural systems for tapered tall buildings is presented.

COMPARATIVE EFFICIENCY BETWEEN STRUCTURAL SYSTEMS FOR COMPLEX-SHAPED TALL BUILDINGS

2014 ◽  
Vol 1 (1) ◽  
Author(s):  
Kyoung Sun Moon
Keyword(s):  
Structural Engineering ◽  
Twist Angle ◽  
Tall Buildings ◽  
Complex Form ◽  
Parametric Models ◽  
Free Form ◽  
Structural Systems ◽  
Structural Efficiency ◽  
Aspect Ratios ◽  
Study Results

This paper presents various structural system design options for complex-shaped tall buildings—such as twisted, tilted, and freeform tall buildings—and evaluates their comparative structural efficiency. For each complex form category, tall buildings are designed with different contemporary tall building structural systems, e.g., diagrids, braced tubes, and outrigger systems. Comparative structural efficiency between these systems in conjunction with building forms and height is studied. The heights of the studied buildings range from 60 to 100 stories, and the corresponding height-to-width aspect ratios range from 6.5 to 10.8. Parametric structural models are generated with Rhino/Grasshopper to investigate the impacts of various important geometric configurations of complex-shaped tall buildings, such as the rate of twist, angle of tilt, and degree of fluctuation of free form. The parametric models are exported to structural engineering software SAP2000 for analyses and design. Based on the study results, comparative structural efficiency between different structural systems of each complex form category is presented.

Braced Tube Structures for Complex-Shaped Tall Buildings

2012 ◽  
Vol 450-451 ◽  
pp. 1584-1587
Author(s):  
Kyoung Sun Moon
Keyword(s):  
Structural Engineering ◽  
Tall Buildings ◽  
Complex Form ◽  
Parametric Models ◽  
Structural Systems ◽  
Lateral Loads ◽  
Structural Efficiency ◽  
Engineering Software ◽  
Geometric Configurations ◽  
Study Results

Braced tubes, which carry lateral loads by axial actions of the perimeter columns and bracings, are very efficient structural systems for tall buildings. This paper investigates structural efficiency of braced tube structures employed for complex-shaped tall buildings, such as twisted, tilted and tapered towers. For each complex form category, tall buildings are designed with braced tube systems, and their structural efficiency is studied in conjunction with building forms. In order to investigate the impacts of various important geometric configurations of complex-shaped tall buildings, parametric models are generated using appropriate computer programs, and the models are exported to structural engineering software for design and analyses. Based on the study results, structural efficiency of braced tubes for each complex form category is estimated.

Analytical Study on Effect of Geometry of Tall Buildings on Diagrid Structural Systems Subjected to Lateral Loads

2016 ◽  
Vol 857 ◽  
pp. 47-52
Author(s):  
Elsa Alexander Anjana ◽  
R. Renjith ◽  
Binu M. Issac
Keyword(s):  
Response Spectrum ◽  
Tall Buildings ◽  
Structural Systems ◽  
Lateral Loads ◽  
Structural System ◽  
Structural Efficiency ◽  
High Rise ◽  
Time Period ◽  
Architectural Planning ◽  
And Performance

Structural design of high rise buildings is governed by lateral loads due to wind or earthquake. As the height of building increases, the lateral load resisting system becomes more important than the structural system that resists the gravitational loads. Recently, diagrid structural system are widely used for tall buildings due to its structural efficiency and flexibility in architectural planning. Diagrid structural system is made around the perimeter of building in the form of a triangulated truss system by intersecting the diagonal and horizontal members. Diagonal members in diagrid structural systems can carry gravity loads as well as lateral loads. Lateral loads are resisted by axial action of the diagonals compared to bending of vertical columns in framed tube structure. The structural efficiency of diagrid system also helps in avoiding interior and corner columns, thereby allowing significant flexibility with the floor plan. In this paper, effect of lateral loads on steel diagrid buildings are studied. Square and rectangular buildings of same plan area with diagrid structural system is considered for the study. Diagrid modules extending upto 2,4,6,8 and 12 storeys are evaluated. Static analysis for the gravity loads, wind and earthquake and response spectrum analysis are carried out for these different combinations of plan shape and diagrid modules and performance of all these diagrid models i.e., storey displacement, storey drift and modal time period are evaluated and compared in this study.

scholarly journals Parametric Analysis of the Shear Lag Effect in Tube Structural Systems of Tall Buildings

2020 ◽  
Vol 11 (1) ◽  
pp. 278
Author(s):  
Ivan Hafner ◽  
Anđelko Vlašić ◽  
Tomislav Kišiček ◽  
Tvrtko Renić
Keyword(s):  
Parametric Analysis ◽  
Numerical Models ◽  
Tall Buildings ◽  
Structural Systems ◽  
Structural Elements ◽  
Structural System ◽  
Shear Lag ◽  
Shear Lag Effect ◽  
Lag Effect ◽  
Secondary Structural Elements

Horizontal loads such as earthquake and wind are considered dominant loads for the design of tall buildings. One of the most efficient structural systems in this regard is the tube structural system. Even though such systems have a high resistance when it comes to horizontal loads, the shear lag effect that is characterized by an incomplete and uneven activation of vertical elements may cause a series of problems such as the deformation of internal panels and secondary structural elements, which cumulatively grow with the height of the building. In this paper, the shear lag effect in a typical tube structure will be observed and analyzed on a series of different numerical models. A parametric analysis will be conducted with a great number of variations in the structural elements and building layout, for the purpose of giving recommendations for an optimal design of a tube structural system.

Sign in / Sign up

Export Citation Format

Share Document