The question here is how many methods available to evaluate in-situ stiffness and mass of well constructed structres and solids. Stiffness is the most important property to analyze structural response. We use theoretical expressions of stiffness and mass to simulate and design structures. The problem is, after structure has been well constructed in position, what an actual stiffness (or mass) is. Theoretical expression of stiffness fails to answer the question. We need a method to evaluate in-situ stiffness and mass.
Furthermore, material could be deteriorated, and structure could be damaged. How could we know, in advance, if an aging or repaired structure is safe to a forseen impact or use. We need to evaluate in-situ stiffness and mass.
The site,
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presents a tool, code name JUNE5, for evaulation of in-situ stiffness and mass. As stated previously, how many methods are available (or proposed) for evaluation of in-situ stiffness and mass? Could we discuss the issue? Thank you.
The question here is how many methods available to evaluate in-situ stiffness and mass of well constructed structres and solids. Stiffness is the most important property to analyze structural response. We use theoretical expressions of stiffness and mass to simulate and design structures. The problem is, after structure has been well constructed in position, what an actual stiffness (or mass) is. Theoretical expression of stiffness fails to answer the question. We need a method to evaluate in-situ stiffness and mass.
Furthermore, material could be deteriorated, and structure could be damaged. How could we know, in advance, if an aging or repaired structure is safe to a forseen impact or use. We need to evaluate in-situ stiffness and mass.
The site,
formatting link
presents a tool, code name JUNE5, for evaulation of in-situ stiffness and mass. As stated previously, how many methods are available (or proposed) for evaluation of in-situ stiffness and mass? Could we discuss the issue? Thank you.
I googled it, and I did find applications of experimental modal analysis to nondestructive evaluation, i.e., an attempt to locate damages or others. However, I could not find anything that evaluates in-situ [K] and [M] of a well-constructed structure. If you have links, is it possible to post them? Thanks.
You did not post a specific question. I am not sure if I provide the answer you are looking for.
Based on the links I googled on the internet, experimental modal analysis compares test results to check if the structural properties have a significant change so as to locate damages. The mothod I introduce evaluates in-situ stiffness and mass. It seems there is no other method that could evaluate in-situ stiffness and mass. Stiffness and mass, we apply to analyze structures, are calculated by theoretical formulation. The actual stiffness and mass are different from the theoretical expression. Material could be deteriorated or aging, and structure could be damaged. Apparently, we need in-situ stiffness and mass to monitor structural condition. However, we never developed a method that could evaluate in-situ stiffness and mass. The method I introduce is for evaluation of in-situ stiffness and mass.
Experimental modal analysis is proposed to locate damages by comparing test results. What is the definition of damage? A change in structural property is not necessary a damage. Can we say a structure is damaged if the structure can safely respond to all foreseen impacts, even the structure has a change in structural properties? If we have in-situ stiffness and mass, that could be evaluated at any time when necessary, to analyze a structure, we can see in advance whether a structure is safe to a foreseen use or impact.
As stated at the beginning, I am not sure which specific question you ask. In-situ stiffness and mass have other applicatins.
Is it the time for us to consider how to evaluate in-situ stiffness and mass? The following is a link that introces a method for evaluation of in-situ stiffness and mass
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