EFFECT OF ROTATIONAL COMPONENTS OF STRONG GROUND MOTIONS ON NONLINEAR RESPONSE OF HIGH-RISE 60-STORY BUILDING WITH OUTRIGGER AND BELT-TRUSS SYSTEM

Publish Year: 1398
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:

SEE08_471

تاریخ نمایه سازی: 23 آبان 1399

Abstract:

As population increases and cities spread, it is necessary to use the land efficiently. High-rise buildings are an appropriate and economical solution to accommodate the population for living and work in a small space of the land. In addition to their magnificence and their contribution to the aesthetics of the city, these buildings can help urban planners as well. Outrigger and belt-truss system is one of the accepted system for construction of high-rise buildings among many other applicable structural systems. The first building built with this system was the First Wisconsin center in Milwaukee, US, which is built in 1974 with the steel material. This building has 42 stories with 183 m height (Kheyroddin & Aramesh, 2015). High-rise buildings are required to be designed precisely and comprehensively due to their importance and strategic position. In order to design the structures properly, the loads on the structures must be fully identified and considered in the design procedure. The earthquake has six components in reality which three of them are transitional and three are rotational. During an earthquake, rotational components are usually combined with transitional components; however, these components are usually neglected. It has been years since ground motion records are identified to have six-components; nevertheless, this fact is usually neglected in the design of the structures (Suryanto, 2006). In this study, a 60-story steel structure with bracing core, outrigger and belt trust system in different heights of the structure is subjected to three-component and six-component nonlinear time history analysis from far-fault ground motions, near-fault ground motions with forward directivity and near-fault ground motions with fling step. In order to select structural properties such as specifications in the plan, height (Figure 1), and the reports of high-rise building constructions are used (ASCE, 2010; Habibullah, 2015). The elastic response of applied earthquake records to the structure is also shown in Figure 2. Moreover, Figure 3 illustrates the distribution of drift ratio index in different stories in the subjected building.

Keywords:

High-rise buildings , Outrigger and belt truss system , Far-fault records , Directivity , Fling step

Authors

Afshin KHODAPARAST

Ph.D. Student, Department of Civil Engineering, Shahid Beheshti University, Tehran, Iran

Hamid Reza TAVAKOLI

Associate Professor, Babol Noshirvani University of Technology, Babol, Iran

Hamed TALESHI AHANGARI

M.Sc. Graduate, Earthquake Engineering, Mazandaran University, Babolsar, Iran