Application of earthquake-induced collapse analysis in design optimization of a supertall building

Abstract

Summary In recent years, a combination of rapid construction of supertall buildings and frequent occurrence of strong earthquakes worldwide demands a rational seismic design method for structures of this kind. Although earthquake‐induced collapse analysis is one of the most efficient methods to quantify the collapse resistance of buildings, little research has been reported on using the collapse analysis to evaluate the seismic safety of supertall buildings during the design stage. To optimize the design taking into account earthquake‐induced collapses, a real‐world supertall building with a height greater than 500 m is investigated in this work. Throughout its design procedure, earthquake‐induced collapse analyses are performed to optimize the design at three different levels (i.e. the structural system level, design parameter level and component level). At the structural system level, the influence of different lateral force‐resisting systems on the collapse resistance is discussed; at the design parameter level, the influence of minimum base shear force is discussed; and at the component level, the influence of high‐performance shear wall on the collapse resistance is studied. Based on these discussions, the optimal design scheme of the building is established to improve the seismic safety while maintaining the cost of construction. Given more and more supertall buildings will be constructed with new structural system and components, this work will provide important references for the seismic design of supertall buildings and the corresponding collapse resistance research in the future. Copyright © 2016 John Wiley & Sons, Ltd.

Seismic Performance and Failure Mechanism of Megabraced Frame-Core Tube Structures with Different Brace Patterns

“…Its mechanical behavior provides superior lateral capacity and allows considerable freedom in architectural planning of the interior space. Many super-tall buildings, including the 108-story CITIC Tower [1], the 118-story Ping'An Financial Center [2], and the 101-story Shanghai World Financial Center [3], were constructed using the megabraced frame-core tube system.…”

“…Most studies of the seismic performance of megabraced frame-core tube structures focus on mechanical characteristics, structural deformation characteristics [13], and the verification of the performance-control parameters under design seismic conditions [2,14]. Some research has considered the differences in the energy dissipation distribution and the collapse capacity under the design seismic condition with various braced schemes [1,15]. ese studies concluded that the chosen brace pattern affects the distribution of structural internal force and even changes the nonlinear development process of the structures.…”

بررسی عملکرد فروریزش لرزه‌یی ساختمان های بتنی کوتاه مرتبه‌ی نامنظم در پلان با رفتار نرم پیچشی در چارچوب Fema-P695

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