Hydration Heat and Solar Radiation Effect Research of Box Girder

Abstract:

Combining construction monitoring of a PC continuous rigid bridge, research the effect of hydration heat in block number zero at construction stage and solar radiation effect in mid-span girder section at operation stage. In construction stage, central section of block number zero is observed for hydration heat effect and WZP-035 platinum thermistors is embedded for observing during the concrete deposit to 120 hours later. As observing, the maximum thermal gradient between inside and outside of box girder is 61.7 centigrade. On the other hand, the simulation result base on Ansys shows this maximum thermal gradient is 63 centigrade. In operation stage, the measuring point on the mid-span girder section is observed for continuous 17 hours under the high solar radiation and high temperature conditions. Ansys is also used to simulate the thermal stress in mid-span girder section. As a result, the stress concentration caused by the hydration heat and solar radiation should be highly valued.

• Periodical: Applied Mechanics and Materials (Volumes 170-173)
• Pages: 2568-2573
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.170-173.2568
• Online since: May 2012
• Authors: Mei Liang Yang*, Tang Ke Ma
• Keywords: Box Girder, Hydration Heat, Solar Radiation, Thermal Stress

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