Limits...
Estimation of Prestress Force Distribution in the Multi-Strand System of Prestressed Concrete Structures.

Cho K, Park SY, Cho JR, Kim ST, Park YH - Sensors (Basel) (2015)

Bottom Line: Smart strands enabling measurement of the prestress force have recently been developed to maintain PSC structures throughout their lifetime.However, the smart strand cannot give a representative indication of the whole prestress force when used in multi-strand systems since each strand sustains a different prestress force.In this paper, the actual distribution of the prestress force in a multi-strand system is examined using elastomagnetic (EM) sensors to develop a method for tracking representative indicators of the prestress force using smart strands.

View Article: PubMed Central - PubMed

Affiliation: Structural Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology, 283 Goyangdae-Ro, Ilsanseo-Gu, Goyang-Si, Gyeonggi-Do 411-712, Korea. kcho@kict.re.kr.

ABSTRACT
Prestressed concrete (PSC) is one of the most reliable, durable and widely used construction materials, which overcomes the weakness of concrete in tension by the introduction of a prestress force. Smart strands enabling measurement of the prestress force have recently been developed to maintain PSC structures throughout their lifetime. However, the smart strand cannot give a representative indication of the whole prestress force when used in multi-strand systems since each strand sustains a different prestress force. In this paper, the actual distribution of the prestress force in a multi-strand system is examined using elastomagnetic (EM) sensors to develop a method for tracking representative indicators of the prestress force using smart strands.

No MeSH data available.


Related in: MedlinePlus

Underlying concept for the evaluation of the prestress force distribution in multi-strand systems.
© Copyright Policy
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4507602&req=5

sensors-15-14079-f001: Underlying concept for the evaluation of the prestress force distribution in multi-strand systems.

Mentions: To that goal, this study intends to assess the distribution characteristics of the prestress force by measuring the prestress force in the multi-strand system and to propose a method for estimating the distribution of the prestress force exploiting the measurements of the smart strands. Figure 1 displays the concept underlying the estimation of the prestress force distribution in the multi-strand system: (1) the actual distribution of the prestress force is first measured using elastomagnetic (EM) sensors; (2) an appropriate probability density function is then selected to fit the measured prestress force distribution; and (3) the distribution and variation of the whole set of prestress forces is estimated based upon the prestress forces measured by the smart strands assuming that the selected distribution function represents the actual prestress force distribution. Since this method enables one to estimate the prestress force distribution all along the lifetime of the PSC structure from its erection to its operating stage, it can be applied for monitoring the structure integrity.


Estimation of Prestress Force Distribution in the Multi-Strand System of Prestressed Concrete Structures.

Cho K, Park SY, Cho JR, Kim ST, Park YH - Sensors (Basel) (2015)

Underlying concept for the evaluation of the prestress force distribution in multi-strand systems.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4507602&req=5

sensors-15-14079-f001: Underlying concept for the evaluation of the prestress force distribution in multi-strand systems.
Mentions: To that goal, this study intends to assess the distribution characteristics of the prestress force by measuring the prestress force in the multi-strand system and to propose a method for estimating the distribution of the prestress force exploiting the measurements of the smart strands. Figure 1 displays the concept underlying the estimation of the prestress force distribution in the multi-strand system: (1) the actual distribution of the prestress force is first measured using elastomagnetic (EM) sensors; (2) an appropriate probability density function is then selected to fit the measured prestress force distribution; and (3) the distribution and variation of the whole set of prestress forces is estimated based upon the prestress forces measured by the smart strands assuming that the selected distribution function represents the actual prestress force distribution. Since this method enables one to estimate the prestress force distribution all along the lifetime of the PSC structure from its erection to its operating stage, it can be applied for monitoring the structure integrity.

Bottom Line: Smart strands enabling measurement of the prestress force have recently been developed to maintain PSC structures throughout their lifetime.However, the smart strand cannot give a representative indication of the whole prestress force when used in multi-strand systems since each strand sustains a different prestress force.In this paper, the actual distribution of the prestress force in a multi-strand system is examined using elastomagnetic (EM) sensors to develop a method for tracking representative indicators of the prestress force using smart strands.

View Article: PubMed Central - PubMed

Affiliation: Structural Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology, 283 Goyangdae-Ro, Ilsanseo-Gu, Goyang-Si, Gyeonggi-Do 411-712, Korea. kcho@kict.re.kr.

ABSTRACT
Prestressed concrete (PSC) is one of the most reliable, durable and widely used construction materials, which overcomes the weakness of concrete in tension by the introduction of a prestress force. Smart strands enabling measurement of the prestress force have recently been developed to maintain PSC structures throughout their lifetime. However, the smart strand cannot give a representative indication of the whole prestress force when used in multi-strand systems since each strand sustains a different prestress force. In this paper, the actual distribution of the prestress force in a multi-strand system is examined using elastomagnetic (EM) sensors to develop a method for tracking representative indicators of the prestress force using smart strands.

No MeSH data available.


Related in: MedlinePlus