مشخصات مقاله:
عنوان فارسی مقاله:
روند دینامیکی آهسته مشاهده شده در سازه های مهندسی عمران برای تشخیص ناهمگونی های ساختاری
عنوان انگلیسی مقاله:
Slow dynamics process observed in civil engineering structures to detect structural heterogeneities
کلمات کلیدی مقاله:
دینامیک کند، بهبود، نظارت بر بهداشت ساختاری، زمین لرزه ها
کلمات کلیدی انگلیسی:
Slow dynamics – Recovery – Structural health monitoring – Earthquakes
مناسب برای رشته های دانشگاهی زیر:
مهندسی عمران
مناسب برای گرایش های دانشگاهی زیر:
سازه
وضعیت مقاله انگلیسی و ترجمه:
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فهرست مطالب:
Abstract
Keywords
1. Introduction
2. Theory of resonance frequency recovery
3. Data, experiments and data processing
4. Analysis of the slow dynamics
5. Application of slow dynamics to actual civil engineering structures
6. Conclusions
Acknowledgment
Appendix A. Supplementary material
Research Data
References
قسمتی از مقاله انگلیسی:
1. Introduction
Elastic waves cause local and reversible disturbances of the medium through which they propagate. This propagation and the time dynamics depend on the elastic properties of the medium. For low-amplitude waves in a homogeneous medium, the behaviour of the material during wave propagation is linear and depends on neither the wave intensity nor the wave shape. On the other hand, non-linear behaviour is classically observed for elastic waves in more complex materials (e.g., granular, heterogeneous), such as rock samples, where the material properties depend on the wave amplitudes. Two types of non-linearity have been described in the literature. ‘Classical’ non-linearity is generally explained by the consideration of the higher order terms in Hooke’s law. However, this theory does not explain some of the observed non-linear phenomena, which are generally known as ‘nonclassical’ non-linearities. In this case, observations refer to both memory effects and hysteresis effects demonstrated by experiments on rock samples [13,16,14]. These characterise the dependency of the material response with respect to the stress to which it is subjected, and to its loading history. initially deteriorate rapidly, which is followed by a period of slow recovery back to the initial values. Johnson and Sutin [17] use the terms ‘anomalous non-linear fast dynamics’ (ANFD) and ‘slow dynamics’ for these two phases, respectively.