Finite-Element Model Updating for Assessment of Progressive Damage in a 3-Story In ﬁ lled RC Frame-猫眼课题宝

用于评估 3 层填充 RC 框架渐进损坏的有限元模型更新

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2013

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作者：

B. Moaveni;A. Stavridis;G. Lombaert;J. Conte;P. Shing

本文采用等效线性有限元模型修正方法，对砌体填充钢筋混凝土框架进行了振动台试验，研究了砌体填充钢筋混凝土框架的渐进损伤识别问题。在UCSD-NEES振动台上对三分之二比例的3层2跨填充RC框架进行了试验，以研究此类结构的抗震性能。振动台试验通过按比例增加强度的历史地震记录逐步引起结构的损伤。在地震试验和不同损伤水平之间，低振幅白噪声基底激励被施加到填充的RC框架上。在这项研究中，有效的模态参数的损伤结构已被识别的白噪声测试数据与假设，它响应准线性的方式。模态识别已根据测量的输入-输出数据使用确定性-随机子空间识别方法进行。基于灵敏度的有限元模型更新策略已被用来检测，定位，并量化损伤（作为有效的局部刚度的损失）的基础上的变化，识别艾德有效的模态参数。结果表明，该方法可以可靠地识别在测试中观察到的损伤的位置和严重程度。DOI：10.1061/（ASCE）ST.1943-541X.0000586。© 2013美国土木工程师协会。本文介绍了一个基于振动的损伤评估研究进行的3层，2间，钢筋混凝土框架与无筋砌体填充墙，是在大型室外振动台在圣地亚哥大学（UCSD）进行测试。测试框架由原型结构的三分之二比例的子组件组成，该原型结构设计有代表性的增强细节。

: This paper presents a study on the identi ﬁ cation of progressive damage, using an equivalent linear ﬁ nite-element model updating strategy, in a masonry in ﬁ lled RC frame that was tested on a shake table. A two-thirds-scale, 3-story, 2-bay, in ﬁ lled RC frame was tested on the UCSD – NEES shake table to investigate the seismic performance of this type of construction. The shake table tests induced damage in the structure progressively through scaledhistorical earthquake recordsof increasing intensity.Between the earthquaketestsandat various levels of damage, low-amplitude white-noise base excitations were applied to the in ﬁ lled RC frame. In this study, the effective modal parameters of the damaged structure have been identi ﬁ ed from the white-noise test data with the assumption that it responded in a quasi-linear manner. Modal identi ﬁ cation has been performed using a deterministic-stochastic subspace identi ﬁ cation method based on the measured input – output data. A sensitivity-based ﬁ nite-element model updating strategy has been employed to detect, locate, and quantify damage (as a loss of effective local stiffness) based on the changes inthe identi ﬁ ed effective modal parameters. The results indicate that the method can reliably identify the location and severity of damage observed in the tests. DOI: 10.1061/(ASCE)ST.1943-541X.0000586. © 2013 American Society of Civil Engineers. paper presents a vibration-based damage assessment study conducted on a 3-story, 2-bay, RC frame with unreinforced masonry in ﬁ ll walls that was tested on the large outdoor shake table at the University of Diego (UCSD). The test frame consisted of a two-thirds-scale subassemblage of a prototype structure designed to have reinforcing details that are representative of the

Finite-Element Model Updating for Assessment of Progressive Damage in a 3-Story In ﬁ lled RC Frame

用于评估 3 层填充 RC 框架渐进损坏的有限元模型更新

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