层间弯剪偏心结构精准模型快速建立方法及多维减震应用  

Rapid modeling method and multi‑dimensional damping application of accurate interlayer flexural shear eccentric structure model

作　　者：何浩祥[1] 孙澔鼎 程扬 HE Hao‑xiang;SUN Hao‑ding;CHENG Yang(Beijing Key Laboratory of Earthquake Engineering and Structural Retrofit,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学工程抗震与结构诊治北京市重点试验室,北京100124

出　　处：《振动工程学报》2023年第6期1590-1601,共12页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目(52378469)。

摘　　要：传统层间剪切模型与建筑结构真实受力状态不符,不能精准反映实际多维偏心结构的动力响应,工程可行性较低。目前的弯剪型简化模型建立方法计算效率偏低且无法直接指导三维偏心结构的建模。针对上述不足,根据结构力学中柔度法的基本原理提出一种精准的快速建立层间弯剪模型的方法。在此基础上,考虑结构的偏心对结构动力响应的影响,建立三维弯剪偏心模型,并通过多维时程分析对比验证在双向及扭转地震波下该简化模型的动力响应相较于有限元模型的差异性。结果表明,基于柔度法建立的三维弯剪偏心简化模型具有建模精度高和计算效率高的优点,并可以准确反映真实结构在多维地震作用下的动力响应。在考虑实际偏心后优化布置调谐阻尼器可充分发挥减震性能。The traditional interlayer shear model of the building structure is not consistent with the real stress of the structure,and cannot accurately reflect the dynamic response of the actual multi-dimensional eccentric structure,so the engineering feasibility is not enough.The current simplified model building method of bending-shear is inefficient and cannot directly guide the modeling of three-dimensional eccentric structure.According to the basic principle of flexibility method in structural mechanics,a fast and accurate method for establishing interlayer flexural shear model is proposed.On this basis,considering the influence of the structure's eccentricity on the dynamic response of the structure,a three-dimensional bending-shear eccentricity model is established,and the effectiveness of the structural damping control under bidirectional and torsional seismic waves is verified by multi-dimensional timehistory analysis.The results show that the simplified three-dimensional flexural shear eccentricity model based on the flexibility method has the advantages of high modeling accuracy and computational efficiency,and can accurately reflect the dynamic response of the real structure under multi-dimensional earthquake action.The optimal arrangement of the tuned dampers after considering the actual eccentricity can fully exploit the damping performance.

关 键 词：有限元模型 柔度法 弯剪模型 动力分析 扭转 减震控制 

分 类 号：TU311.4[建筑科学—结构工程] TU973.23