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Prestress Force Identification for Externally Prestressed Concrete Beam Based on Frequency Equation and Measured Frequencies
المؤلفون المشاركون
Shi, Luning
Yan, Weiming
He, Haoxiang
المصدر
Mathematical Problems in Engineering
العدد
المجلد 2014، العدد 2014 (31 ديسمبر/كانون الأول 2014)، ص ص. 1-13، 13ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2014-06-05
دولة النشر
مصر
عدد الصفحات
13
التخصصات الرئيسية
الملخص EN
A prestress force identification method for externally prestressed concrete uniform beam based on the frequency equation and the measured frequencies is developed.
For the purpose of the prestress force identification accuracy, we first look for the appropriate method to solve the free vibration equation of externally prestressed concrete beam and then combine the measured frequencies with frequency equation to identify the prestress force.
To obtain the exact solution of the free vibration equation of multispan externally prestressed concrete beam, an analytical model of externally prestressed concrete beam is set up based on the Bernoulli-Euler beam theory and the function relation between prestress variation and vibration displacement is built.
The multispan externally prestressed concrete beam is taken as the multiple single-span beams which must meet the bending moment and rotation angle boundary conditions, the free vibration equation is solved using sublevel simultaneous method and the semi-analytical solution of the free vibration equation which considered the influence of prestress on section rigidity and beam length is obtained.
Taking simply supported concrete beam and two-span concrete beam with external tendons as examples, frequency function curves are obtained with the measured frequencies into it and the prestress force can be identified using the abscissa of the crosspoint of frequency functions.
Identification value of the prestress force is in good agreement with the test results.
The method can accurately identify prestress force of externally prestressed concrete beam and trace the trend of effective prestress force.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Shi, Luning& He, Haoxiang& Yan, Weiming. 2014. Prestress Force Identification for Externally Prestressed Concrete Beam Based on Frequency Equation and Measured Frequencies. Mathematical Problems in Engineering،Vol. 2014, no. 2014, pp.1-13.
https://search.emarefa.net/detail/BIM-502450
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Shi, Luning…[et al.]. Prestress Force Identification for Externally Prestressed Concrete Beam Based on Frequency Equation and Measured Frequencies. Mathematical Problems in Engineering No. 2014 (2014), pp.1-13.
https://search.emarefa.net/detail/BIM-502450
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Shi, Luning& He, Haoxiang& Yan, Weiming. Prestress Force Identification for Externally Prestressed Concrete Beam Based on Frequency Equation and Measured Frequencies. Mathematical Problems in Engineering. 2014. Vol. 2014, no. 2014, pp.1-13.
https://search.emarefa.net/detail/BIM-502450
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-502450
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
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