Selective online model updating in hybrid simulation of a full-scale steel moment frame

IF 4.3 2区 工程技术 Q1 ENGINEERING, CIVIL
Claudio Sepulveda, Mao Cheng, Tracy Becker, Gilberto Mosqueda, Kung-Juin Wang, Po-Chia Huang, Cheng-Wei Huang, Chia-Ming Uang, Chung-Che Chou
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Abstract

This study presents the implementation of an online model updating algorithm within a full-scale hybrid simulation (HS) of a six story, four bay steel moment frame. The experimental substructure consists of a cruciform subassembly generating critical data on the nonlinear behavior of the first story column and two beams with reduced beam sections (RBSs) on each side. The updating algorithm focuses on the modeling parameters of plastic hinge elements representing the RBSs in the numerical model. A smooth plasticity model is utilized for beam plastic hinges with updating parameters identified from on-line experimental data through a modified version of the unscented Kalman filter. The HS shows that the numerical beam hinges based on simple hysteretic model with updated parameters are able to capture the characteristic behavior observed in experiments. Due to fracture of beam flanges is observed in the experiments, a selective updating concept is proposed to allow for updating multiple numerical components accounting for asymmetric behavior and variability in the response. The selective updating method is validated through virtual HSs that are better able to identify and isolate the effects of fracture and other behavioral characteristics. The combination of results from physical and virtual tests highlights the benefits of model updating on the local and overall system-level response.

Abstract Image

全尺寸钢制弯矩框架混合模拟中的选择性在线模型更新
本研究介绍了在线模型更新算法在六层四榀钢制弯矩框架全尺寸混合模拟(HS)中的应用。实验子结构包括一个十字形子组件,该组件可生成第一层柱子和两根横梁的非线性行为的关键数据,两根横梁的两侧各有一个缩减梁截面 (RBS)。更新算法的重点是数值模型中代表 RBS 的塑性铰元素的建模参数。梁塑性铰链采用平滑塑性模型,更新参数通过改进版的无香味卡尔曼滤波器从在线实验数据中确定。研究表明,基于简单滞后模型和更新参数的数值梁铰链能够捕捉到实验中观察到的特征行为。由于在实验中观察到梁翼缘板断裂,因此提出了选择性更新概念,以允许更新多个数值成分,从而考虑到响应中的非对称行为和可变性。选择性更新方法通过虚拟 HS 得到验证,虚拟 HS 能够更好地识别和隔离断裂和其他行为特征的影响。物理测试和虚拟测试的结果相结合,凸显了模型更新对局部和整体系统级响应的益处。
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来源期刊
Earthquake Engineering & Structural Dynamics
Earthquake Engineering & Structural Dynamics 工程技术-工程:地质
CiteScore
7.20
自引率
13.30%
发文量
180
审稿时长
4.8 months
期刊介绍: Earthquake Engineering and Structural Dynamics provides a forum for the publication of papers on several aspects of engineering related to earthquakes. The problems in this field, and their solutions, are international in character and require knowledge of several traditional disciplines; the Journal will reflect this. Papers that may be relevant but do not emphasize earthquake engineering and related structural dynamics are not suitable for the Journal. Relevant topics include the following: ground motions for analysis and design geotechnical earthquake engineering probabilistic and deterministic methods of dynamic analysis experimental behaviour of structures seismic protective systems system identification risk assessment seismic code requirements methods for earthquake-resistant design and retrofit of structures.
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