Shaking table model test and FE analysis of a reinforced concrete mega‐frame structure with tuned mass dampers

Finite Elements in Analysis and Design

et al. 2015

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266

a b s t r a c tNumerical simulation has increasingly become an effective method and powerful tool for performancebased earthquake engineering research. Amongst the existing research efforts, most numerical analyses were conducted using general-purpose commercial software, which to some extent limits in-depth investigations on specific topics with complicated nature. In consequence, this work develops a new shear wall element model and associated material constitutive models based on the open source finite element (FE) code OpenSees, in order to perform nonlinear seismic analyses of high-rise RC frame-core tube structures. A series of shear walls, a 141.8-m frame-core tube building and a super-tall building (the Shanghai Tower, with a height of 632 m) are simulated. The rationality and reliability of the proposed element model and analysis method are validated through comparison with the available experimental data as well as the analytical results of a well validated commercial FE code. The research outcome will assist in providing a useful reference and an effective tool for further numerical analysis of the seismic behavior of tall and super-tall buildings.

Section: Introductionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A shear wall element for nonlinear seismic analysis of super-tall buildings using OpenSees

Xie

Finite Elements in Analysis and Design

et al. 2015

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266

“…The longitudinal and transverse rebars are smeared into equivalent steel layers. For the boundary zones of the shear wall, the concentrated reinforcing bars are simulated using beam elements, which are embedded in the shell elements by nodes sharing (Lu et al, 2013a(Lu et al, , 2013b(Lu et al, , 2015bJiang et al, 2014). Existing studies show that such a modeling approach can successfully represent the nonlinear seismic behavior of supertall buildings with acceptable modeling and computing workload (Lu et al, 2011(Lu et al, , 2013a(Lu et al, , 2013b.…”

Section: Numerical Model Of the Supertall Buildingmentioning

confidence: 99%

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

Struct Design Tall Spec Build

Xie

2016

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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.

A comparative case study on seismic design of tall RC frame-core-tube structures in China and USA

Struct. Design Tall Spec. Build.

et al. 2015

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To evaluate the major differences between the Chinese and the United States (US) seismic design codes from a structural system viewpoint, a comparative case study is conducted on a tall frame-core tube building, a typical type of reinforced concrete (RC) system widely constructed in both countries. The building, originally designed using the US seismic design code, is firstly redesigned according to the Chinese seismic design code based on the information provided by the Pacific Earthquake Engineering Research Center (PEER). Secondly, the member dimensions, the dynamic characteristics, the seismic design forces and the material consumptions of the two designs are compared in some detail. Subsequently, nonlinear finite element models of both designs are established to evaluate their seismic performances under different earthquake intensities. Results indicate that the seismic design forces determined by the Chinese response spectrum are larger than those determined by the US spectrum at the same seismic hazard level. In addition, the upper-bound restriction for the inter-story drift ratio is more rigorously specified by the Chinese code. These two aspects have led to a higher level of material consumption for a structure designed by the Chinese code. Despite of the above, the two designs yield roughly similar structural performances under earthquakes.