| 引用本文: | 张东昱,韩一航,王亭强.既有框架结构的新型等效简化动力模型构建方法[J].哈尔滨工业大学学报,2024,56(1):46.DOI:10.11918/202309003 |
| ZHANG Dongyu,HAN Yihang,WANG Tingqiang.Building a novel equivalent simplified dynamic model for existing frame structures[J].Journal of Harbin Institute of Technology,2024,56(1):46.DOI:10.11918/202309003 |
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| 摘要: |
| 为了实现对长期服役后的结构在地震、风等动荷载作用下安全性和舒适性的评估,利用监/检测数据建立一个能准确反映实际建筑在地震、风等动荷载作用下动力响应的结构动力学模型至关重要。本文针对非常普遍的框架建筑结构,提出了一种基于少量移动传感器的框架结构等效简化动力学模型构建方法。首先,提出建筑结构等效简化模型构建的层间剪力等效原理,证明了以该原理构建的简化模型具备准确模拟实际建筑结构动力响应的能力。其次,推导了框架结构简化模型形式,并研究了简化模型参数特点。然后,提出了一种框架结构简化模型参数的迭代识别方法,实现了仅使用少量无线移动传感器的简化模型参数识别。最后,通过一个12层3跨钢框架结构数值模拟算例,研究了在不预知结构刚度退化的具体形式和仅使用少量移动加速度传感器的条件下,由本文所提方法构建的等效简化模型对实际框架结构在不同水平动荷载作用下结构动力响应的预测能力。数值试验结果表明,等效简化模型能准确模拟不同荷载工况下框架结构加速度和位移响应。因此,本文提出的框架结构等效简化模型构建方法将在评估既有框架结构在风、地震等动荷载作用下的结构安全性和舒适性方面具有重要的应用前景。 |
| 关键词: 框架结构等效简化模型 层间剪力等效原理 参数识别 结构响应预测 |
| DOI：10.11918/202309003 |
| 分类号:TU375 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(U3,5) |
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| Building a novel equivalent simplified dynamic model for existing frame structures |
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ZHANG Dongyu1,2,HAN Yihang1,2,WANG Tingqiang3
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(1.School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China; 2.Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters (Harbin Institute of Technology), Ministry of Industry and Information Technology, Harbin 150090, China; 3.Goldwind Science & Technology Co. Ltd., Beijing 100167, China)
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| Abstract: |
| To accurately evaluate the safety and comfortability of structures after a long period of service under dynamic loads such as earthquakes and wind, it is critical to establish a structural dynamic model that can accurately reflect the dynamic responses of actual buildings under seismic, wind and other dynamic loads utilizing the monitoring/inspection data. In this paper, for popular frame building structures, an equivalent simplified dynamic modeling method is proposed by using a few numbers of wireless mobile sensors. First, the principle of equivalent interstory shear force for a simplified model of buildings is proposed, which proves that the simplified model constructed based on this principle has the ability to accurately simulate the dynamic response of actual buildings. Second, the form of simplified model of frame structure was derived, and the characteristics of the simplified model parameters were studied. Then, an iterative identification method for the parameters of the simplified model was proposed, which can identify all parameters of the simplified model by solely using a small number of wireless mobile sensors. Finally, a numerical simulation example of a 12-story 3-span steel frame structure was conducted, which investigates the predictive capability of the equivalent simplified model constructed by the method proposed herein to predict the dynamic responses of the actual frame structure subjected to different types of horizontal excitations, under the condition of without knowing the specific format of structural stiffness degradation and using only a small number of moving acceleration sensors. Simulation results show that the equivalent simplified model can very accurately predict the dynamic responses of the actual frame structure subjected to different types of horizontal excitations. Therefore, the model updating method for the equivalent simplified model of frame structures proposed herein will have important application potential in evaluating the structural safety and comfort of existing frame building structures under dynamic loads, such as wind and earthquake. |
| Key words: equivalent simplified model of frame structure principle of interstory shear equivalence parameter identification structural response prediction |
