Displacement‐Based Design of Precast Walls with Additional Dampers
Displacement‐Based Design of Precast Walls with Additional Dampers
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DOI：
10.1080/13632460902813265
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发表时间：
2009-04
影响因子：
2.6
通讯作者：
D. Pennucci;G. Calvi;T. Sullivan
中科院分区：
文献类型：
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作者：
D. Pennucci;G. Calvi;T. Sullivan
根据现行抗震规范规定设计的大多数传统结构在设计级地震后将承受重要的残余变形。在许多情况下，这种损害将导致大规模和昂贵的结构改造，即使它们按照预期运行，确保生命安全。本文研究了一种新的新兴技术，该技术可以控制结构在设计级地震中对指定位移限制的反应，并保持可忽略的损伤和残余变形。它由预制混凝土墙组成，用部分未粘结的电缆后张，允许在基础处岩石，并加上人工阻尼器。建立了数值模型，并与实验结果进行了对比验证。Priestley等人[2007]最初提出的基于位移的设计程序随后被扩展并适应于摇壁系统。然后将新的设计程序应用于4层、8层、12层、16层和20层的一组案例研究结构，并通过非线性动力分析进行验证，结果表明效果良好。
Most traditional structures designed according to current seismic code provisions will sustain important residual deformations after a design-level earthquake. In many cases, such damage would lead to extensive and costly retrofitting of the structure even if they performed as expected by ensuring life safety. A new emerging technology that controls the response of a structure during the design-level earthquake to specified displacement limits and sustains negligible damage and residual deformations is herein investigated. It consists of precast concrete walls post-tensioned with partially unbonded cables, allowed to rock at the foundation and coupled with artificial dampers. A numerical model is presented and validated through comparison with previous experimental results. The displacement based design procedure initially proposed by Priestley et al. [2007] is then extended and adapted to the rocking wall systems. The new design procedure is then applied to a set of case study structures of 4, 8, 12, 16, and 20 stories and validated through nonlinear dynamic analyses, which indicate excellent results.