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过去20年里,试验模拟分析和有限元模型修正技术在机械工程和航空航天工程中得到有效应用,它们是结构健康识别的有效方法,为正常工作和突发事件下结构损伤的检测、评估及量化提供了基础资料。由于结构种类、材料属性、边界条件及损伤模型的多样性,健康检测技术在地震作用下土木工程中的应用研究还不够完善。为了设计震后康复时间间隔,需要研究结构损伤分布和承载力,费用高且耗时长。将基于损伤鉴定技术的振动应用于依据抗震承载力方法设计的高韧性结构中,可提高这些方法的可行性、可靠性及效率。通过意大利伊斯普拉节点研究中心的伪动力往复试验,基于振动测量的有限元模型修正技术可用于检测,评估,量化遭受持续地震破坏的高韧性钢-混组合框架的结构损伤。针对不同的建模方案,通过3个损伤水平对不同的有限元结构模型进行修正,可全面描述和量化梁柱节点的逐步退化性质,以用于耗散地震能量的设计。
In the past 20 years, experimental simulation analysis and finite element model correction techniques have been effectively applied in mechanical engineering and aerospace engineering. They are effective methods for structural health identification. They are used for the detection and assessment of structural damage under normal working and emergencies and Quantitative provides the basic information. Due to the variety of structures, the properties of materials, the boundary conditions and the diversity of damage models, the application of health detection technology in civil engineering under earthquake is still not perfect. In order to design the post-earthquake rehabilitation interval, it is necessary to study the structural damage distribution and bearing capacity, which is expensive and time-consuming. The application of vibration-based damage identification technology to high-toughness structures designed according to the method of seismic bearing capacity can improve the feasibility, reliability and efficiency of these methods. Through the reciprocating test of pseudodynamic force at Ischpore node research center in Italy, the finite element model correction technique based on vibration measurement can be used to detect, evaluate and quantify the structural damage of high toughness steel-concrete composite frame subjected to continuous earthquake damage. According to different modeling schemes, the different finite element models are modified by three damage levels to describe and quantify the gradual degradation of beam-column joints in a comprehensive way for the design of dissipative seismic energy.