03265nas|a2200397 i 4500 20260818133343.0 030815s2003 th uzm rtt 00| a1eng d .b11894088 AIT Thesis no.ST-03-23 Ram Wattanawerawong Health monitoring of a three-span contineous prestressed concrete bridge in Bangkok Bangkok : Asian Institute of Technology, 2003 68 leaves Thesis ; no. ST-03-23 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology Thesis (M.Eng.) - Asian Institute of Technology, 2003 The development and implementation of the bridge health monitoring system of the Taksin Bridge, which has already been carried out by Infrastructure Monitoring and Management System (IMMS) Company, are presented and discussed in this research. The Taksin Bridge, over 20 years old, is twin bridges and consists of three-span continuous pre-stressed concrete single box-girders. Currently, the monitor installed at the bridge has 24 channels of different sensor types collecting data such as strains, accelerations, temperature, and movement of support. The monitoring signals are obtained continuously and provide very valuable but limited information. It would seem that the main challenge is to interpret the meaning of the measurements and observations intelligently and systematically. In this research, therefore, we try to interpret the meaning of the health monitoring signals by using a reliable and accurate FE model which is validated by comparing the predicted natural frequencies and mode shapes with the ambient vibration test by Petchroen (2002). A comparison of the experimental results with those by the FE model method indicated a higher degree of correlation. The development and calibration of the FE model are illustrated. Up to now, we have carried out the studies on an investigation of the behavior of this bridge under thermal loadings by using calibrated FE model. It is found that a sinecurve pattern of a mean value of a statistical data is significantly caused by the effects of the temperature change. Bridges Thailand Bangkok Finite element method Pennung Warnitchai, Chairperson Pichai Nimityongskul, Examination Committee Kim, Kidu, Examination Committee RTG Fellowships, Scholarship donor Asian Institute of Technology. Thesis ; no. ST-03-23 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B08916 .b11894088 mnait u 240404 0 030815 m a u 0 mnait mnarc 22 40 Barcode : 30050120745558 CREATED : 2014-04-29 RECORD # : i12792743 LPATRON : 1029077 LCHKIN : 2019-08-13 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 1 TOT CHKOUT : 1 TOT RENEW : 0 Barcode : 30050160067699 CREATED : 2016-04-19 RECORD # : i12937587 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 54509 54509 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.ST-03-23 30050120745558 2026-08-18 13:33:43 3 2026-08-18 22 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no.ST-03-23 30050160067699 2026-08-18 13:33:43 1 2026-08-18 40