Comparative Structural Performance Of Diagrid and Bracing System in Mitigation of Lateral Displacement

12th International Civil Engineering Post Graduate Conference;3rd International Symposium on Expertise of Engineering Design

土木建筑工程

Abd Samat, Roslida^1 ; Fikri Khairudin, Muhammad^1 ; Haziq Din, Muhammad^1 ; Gamal Ali, Gamil^1 ; Bakar Fadzil, Abu^1 ; Abu Bakar, Suhaimi^1

Faculty of Civil Engineering, Universiti Teknologi Malaysia, Skudai, Johore

81310, Malaysia^1

关键词: Effective systems;    High rise building;    Lateral displacements;    Number of storeys;    Structural performance;    Structural systems;    Torsional directions;    Torsional natural frequencies;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/220/1/012025/pdf
DOI  :  10.1088/1755-1315/220/1/012025

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

The design of high rise building with more than 10 stories is controlled by lateral drift which increases the cost rapidly with the number of stories. Recently, the diagrid structural system has emerged and in fact has been widely used for high rise buildings. How effective is a diagrid system in mitigating the lateral displacement of a high rise building? Thus, the objective of this research is to compare the lateral displacement of high rise building that adopts diagrid system with those that use X-bracing and frame system, due to wind. This research also explored the effect of using diagrid, X-bracing and frame system to the natural frequency of high rise building. Two diagrid systems which are 60°-diagrid and 80°-diagrid that has an angle of inclination of 60 degrees and 80 degrees, respectively, were studied. STAAD Pro software was used to analyse twelve building models to determine the lateral displacement due to wind load and the natural frequency in the along wind, across wind and torsional directions. Building with 80°-diagrid has the least lateral displacement, followed by buildings with the X-bracing, 60°-diagrid and frame for 40 and 60 storey buildings. Further study showed that X-bracing became the most effective system to lower the lateral displacement compared with the diagrid and frame when the number of storey of the building exceeds 71 storeys. Natural frequency was not affected by the different systems used except for torsional natural frequency that increased substantially by the use of 60°-diagrid.