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Optimum lateral extent of soil domain for dynamic SSI analysis of RC framed buildings on pile foundations

Frontiers of Structural and Civil Engineering 2020年第1期14卷 62-81页

作者： Nishant SHARMA Kaustubh DASGUPTA Arindam DEY Department of Civil Engineering Indian Institute of Technology GuwahatiGuwahati 781039India

This article describes a novel approach for deciding optimal horizontal extent of soil domain to be used for finite element based numerical dynamic soil structure interaction(SSI)*** model for a 12 storied building frame,supported on pile foundation-soil system,is developed in the finite element based software framework,*** different structure-foundation configurations are analyzed under different ground motion *** extent of soil domain,along with the soil properties,were varied exhaustively for a particular structural *** on the reduction in the variation of acceleration response at different locations in the SSI system(quantified by normalized root mean square error,NRMSE),the optimum lateral extent of the soil domain is prescribed for various structural widths,soil types and peak ground acceleration levels of ground *** to the past studies,error estimation analysis shows that the relationships prescribed in the present study are credible and more inclusive of the various factors that influence *** relationships can be readily applied for deciding upon the lateral extent of the soil domain for conducting precise SSI analysis with reduced computational time.

关键词： soil structure interaction optimum lateral extent of soil domain length multi-storyed framed building pile foundation OpenSEES L-K boundaries dynamic analysis

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The diagram category of framed tangles and invariants of quantized symplectic group

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Science China Mathematics 2020年第4期63卷 689-700页

作者： Zhankui Xiao Yuping Yang Yinhuo Zhang School of Mathematical Sciences Huaqiao UniversityQuanzhou 362021China Department of Mathematics&Statistics University of HasseltUniversitaire CampusDiepenbeek 3590Belgium

In this paper,we present a categorical version of the first and second fundamental theorems of the invariant theory for the quantized symplectic *** methods depend on the theory of braided strict monoidal categories w... 详细信息

关键词： diagram category of framed tangles invariant theory quantized symplectic group BirmanMurakami-Wenzl algebra

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FRAMING BORDISM GROUPS OF framed IMMERSED SUBMANIFOLDS

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Systems Science and Mathematical Sciences 1989年第4期2卷 364-368页

作者：李贵松 Institute of Systems Science Academia SinicaBeijingChina

We prove that the nth framing bordism group of framed immersed submanifoldsin a manifold N,which is denoted by Δn（N）,is canonically isomorphic to the normalbordism group Ωn（N,-TN）.

关键词： Framing bordism framed immersed submanifold normal bordism group

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Seismic response of high-rise steel framed buildings with Chevron-braced designed according to Venezuelan codes

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Natural Science 2012年第8期4卷 694-698页

作者： Ronald Ugel Juan Carlos Vielma Reyes Herrera Sigrit Perez Alex Barbat Senior Technical School of Roads Canals and Ports Engineers of Barcelona Technical University of Catalonia. Barcelona Spain Structural Engineering Department School of Civil Engineering Lisandro Alvarado University. Barquisimeto Venezuela

The object of this study is to determine the seismic response of regular high-rise steel buildings with chevron-braced frames. Mechanics models of three buildings of 14, 18 and 20 stories are studied, all of them with similar geometric characteristics in plant and elevation. These models are realized using prescriptions and parameters from venezuelan design codes. The seismic action is carry on through varius synthetic design spectrum compatible accelerograms defined by the seismic codes in this study, with three levels of intensity corresponding to three specific Limit States. Dynamic analysis is used to compute parameters of ductility, over strength and maximum displacements. From these results it can be concluded that chevron-braced frames presented a good overall performance and non V-braced frames show greater damage due to dynamic actions, validating non linear dynamic analysis as a very powerful tool to seismic-resistance design and chevron-braced frames as a very useful choice in improving the response of tall steel structures. since this lateral bracing system is absent from Venezuelan seismic codes.

关键词： framed Steel Buildings Chevron Braced Frames Non Linear Analysis Over Strength Seismic Response

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