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Performance-Based Engineering of Tall Building Concrete Core Walls in High Seismicity Regions

机译：高地震区高层建筑混凝土心墙的基于性能的工程

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摘要

Performance-based engineering of tall buildings in regions of high seismicity is becoming an increasingly popular design methodology. However, the current state of knowledge and practice in nonlinear modeling and performance-based design of this type of buildings is not growing fast enough to meet the profession's needs. Many nonlinear modeling parameters in core wall tall buildings are controversial in the professional community and are still undergoing extensive academic research. This paper summarizes on the current state-of-knowledge and best practices of core wall tall building seismic engineering from the perspective of the nonlinear performance-based design of a 30-story concrete core wall only office Tower, located in downtown San Francisco. The Tower consists of a cast-in-place center concrete shear wall core and perimeter gravity columns connected with a 14 in. thick, void-formed post-tensioned concrete diaphragm. The nonlinear model features a fiber element core wall along with shear displacement hinged link beams and explicitly models the ground floor and basement level slabs. Inelastic gravity columns and floor diaphragm components are included to detect any nonlinearity and incorporate its effects. A suite of 10 pairs of maximum considered earthquake (MCE) ground motion records is used to evaluate building performance. The nonlinear response of the 10 ground motion analysis is highlighted. The paper also presents results of parametric studies that highlight the effect of some of the critical nonlinear modeling parameters on the performance of core wall tall buildings undergoing inelastic deformations. These parameters include the combinations of modal and Rayleigh damping, link beam modeling properties, and podium diaphragm effects. Based on the results of the performed parametric studies, best modeling practices are suggested.
机译：在高地震区域的高层建筑的基于性能的工程设计正在成为一种越来越流行的设计方法。但是，这类建筑物的非线性建模和基于性能的设计的当前知识和实践的发展速度还不够快，无法满足专业需求。核心墙高层建筑中的许多非线性建模参数在专业界引起争议，并且仍在进行广泛的学术研究。本文从位于旧金山市区的30层混凝土仅核心墙办公楼的基于非线性性能的设计角度，概述了核心墙高层建筑地震工程的知识和最佳实践。该塔由现浇中央混凝土剪力墙芯和周边重力柱组成，该柱与14英寸厚，空隙形成的后张混凝土隔板相连。非线性模型的特征是纤维单元的芯壁以及剪切位移铰接的连接梁，并显式地模拟了地下和地下室的楼板。包括非弹性重力柱和地板振动膜组件，可检测任何非线性并吸收其影响。一组10对最大考虑地震（MCE）地震动记录用于评估建筑性能。重点介绍了10次地面运动分析的非线性响应。本文还提供了参数研究的结果，这些研究突出了一些关键的非线性建模参数对经历非弹性变形的核心墙高层建筑性能的影响。这些参数包括模态阻尼和瑞利阻尼，链接梁建模特性以及讲台膜片效果的组合。根据执行的参数研究的结果，建议最佳建模方法。

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  • 来源
    《》|2012年|189-213|共25页
  • 会议地点 Santa Fe NM(US)
  • 作者

    Mark Sarkisian; Wael M. Hassan; Eric Long;

  • 作者单位

    Skidmore, Owings Merrill LLP San Francisco, CA;

    Skidmore, Owings Merrill LLP San Francisco, CA;

    Skidmore, Owings Merrill LLP San Francisco, CA;

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  • 原文格式 PDF
  • 正文语种 eng
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