THE SEISMIC PERFORMANCE OF THE FRAME-SHEAR WALL TALL BUILDING WITH AND WITHOUT VERTICAL SETBACK

Mashrah Waleed Ali Hamed, Zhao Jianchang, Okine Michael Nii Sarbah

Abstract: Recently, High-rise buildings are developed very quickly to satisfy the production and peoples’ living needs and development. There are so many reasons for large number of developments of the high- rise building, commercialization, industrialization and urbanization. This quick development of the high-rise building necessitates study and analysis of the seismic performance of highrise buildings, especially when the high-rise building has irregularity in its horizontal plan or vertical section. In this present study, main focus to analyze the relative earthquake performance for the tower portion of a 34 storey Reinforced Concrete (RC) with 103.4m total height frame-shear wall buildings with and without setbacks subjected to an earthquake excitation scaled down to be of peak ground acceleration appropriate for China, and analyze the setback influence on this high-rise building to identify weakness positions in the high-rise building structure. The comprehensive use of SAP2000 software V16.1 for the elastic calculations aid to assess nonlinear time history analysis for their applicability to tower models (first model with setbacks, second model without setback) of height-rise frame-shear wall building under same conditions of the site category, earthquake acceleration type and standards in structural design. This study is carried out first to judge the shear for the tall building model 1 belongs to which type of the torsion, second to study how the vertical (elevation) setback impact in tall building resisting seismic activity.

Keywords: Setback; SAP2000; Irregular high-rise building; Frame-shear wall; Seismic analysis; Time history analysis.

DOI: https://doi.org/10.15623/ijret.2015.0410050