Most bridges in Taiwan are simple beam bridge , and most of them have been used more than twenty years , even some of them are used fifty years.In recent years , there are many floods in Taiwan rivers . There are often high-velocity,flow,and entrainment of a large number of sediment from happening.This situation for the bridge itself and the safety of people cause a great threat , bridge health examination become an important issue after Typhoon Morakot. In this study , we explored modern measurement technique for bridge deformation monitoring , and it can also used bridge health examination.
The cross bridge measurement and modeling is focused on the vicinity area around Da-Jia Bridge of Highway 1 based on Angle-Distance monitoring survey, Leveling, close-range photogrammetry, and 3D laser scanning technologies. The 3D point cloud model of bridge is constructed for the purpose of comparing the accuracy between four technologies. Moreover, the discussion and investigation is also conducted for at least three bridges span and two-side of the bridge deformation monitoring. P29 to P25 bridge pier deflection measurements of the monitoring points for each completed total of five point and the deformation monitoring accuracy is analyzed base on four technologies.
Finally, development of the technical specification draft for bridge deformation monitoring is to aim the goal of technologically advanced, economical, and safe application in the technology of deformation monitoring of bridges. At present, the draft of technical specification applies only to the measurements of structure, settlement, displacement, and tilt for simple beam-type bridge. The bridge deformation monitoring after the flood season can reflect the degree of deformation or the deformation trend.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0220112-093934 |
| Date | 20 February 2012 |
| Creators | Hsu, Chin-Chien |
| Contributors | none, none, none, none, Shiahn-wern Shyue |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0220112-093934 |
| Rights | user_define, Copyright information available at source archive |
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