Application of Vierendeel in Outrigger Structures in Highrise Buildings

Abstract

This paper proposes the possibility to introduce a vierendeel structure, a beam with longitudinal openings, to apply in the outrigger system. For decades, the outrigger system has been used in high rise buildings to increase the lateral stiffness of the building. Due to the fact that the buildings are exposed to lateral loads as a result of wind and earthquakes load conditions which causes the increment of lateral displacement when the buildings become taller. The benefits of using vierendeel in outriggers are that it provides more area and space, as well as more usability. The research was conducted by finite element analysis programming. Analysis of the story drift, bending moments and axial forces that occurred in the structural members of the U-Chu Ling building was conducted to verify whether these members meet the standard or not. From the analysis, it was found that story drift, and internal forces occurred in members do not meet the DPT 103-52 standard. Therefore, it was necessary to analyze the optimal position of the building with shear wall later used the reinforced concrete vierendeel and steel truss. It can be summarized from the analysis that the optimum position of the vierendeel for U-Chu Ling building is on 25^th floor which is approximately located on 2/3 of the overall buildings height.