The Comparative Exploration on Early Pattern of Tall Buildings Based on Seismic Design & Reinforced Concrete Structure: Exploring the behavior of tall buildings under seismic forces

Abstract

Nowadays, in moderntall buildings, lateral loads induced by wind or earthquake forces are oftenresisted by a system of multi-outriggers. An outrigger is a stiff beam thatconnects the shear walls to exterior columns. When the structure is subjectedto lateral forces, the outrigger and the columns resist the rotation of thecore and thus significantly reduce the lateral deflection and base moment,which would have arisen in a free core. During the last three decades, numerousstudies have been carried out on the analysis and behavior of outriggerstructures. But this question is remained that how many outriggers system isneeded in tall buildings. Reinforced concrete walls are commonly used as theprimary lateral force-resisting system for tall buildings. As the tools forconducting nonlinear response history analysis have improved and with theadvent of performance based seismic design, reinforced concrete walls and corewalls are often employed as the only lateral force resisting system. Propermodelling of the load versus deformation behaviour of reinforced concrete wallsand link beams is essential to accurately predict important responsequantities. Given this critical need, an overview of modelling approachesappropriate to capture the lateral load responses of both slender and stoutreinforced concrete walls, as well as link beams, is presented. Modelling ofboth flexural and shear responses is addressed, as well as the potential impactof coupled flexure–shear behaviour.