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Analysis of Temperature Distribution on Concrete Box Girder Bridge at High Latitudes Region

Author: MeiZhu
Tutor: JiaYanMin
School: Northeast Forestry University
Course: Bridge and Tunnel Engineering
Keywords: Concrete box girder Temperature distribution ABAQUS software Concrete hydration heat
CLC: U448.213
Type: Master's thesis
Year: 2011
Downloads: 56
Quote: 0
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Abstract


Harbin is located at latitude 44 ° 04'-46 ° 40 ' between the high latitudes , by the strong cold air Siberian regions of the same latitude in the coldest regions. Frequent cold annual temperature in the region , monthly temperature and diurnal temperature range are larger. Concrete bridge concrete pouring process will be affected hydration heat , and exposed to the natural environment and exposed to direct sunlight , seasonal temperature changes , cold and other climatic factors, but the concrete itself, poor thermal conductivity , so often leads to concrete box girder in the transverse and have a greater vertical temperature difference . Thermal stress caused by the temperature difference can sometimes exceed the live load , dead load stresses. Poor tensile properties of the concrete and girder wall thickness is relatively small, so easier to produce concrete bridges temperature cracks , affecting the durability of concrete and security. In this paper, Harbin North Bridge Approach Matsuura single box girder concrete double room with south approach of a single four-room concrete box girder for the object tested. Statistics Harbin counting from the start of the test month within a year of the basic climatic characteristics , and analyzed the temperature , wind direction, wind speed, cold concrete box girder temperature field . With concrete box girder is based on the measured temperature data were analyzed in the hydration heat temperature , seasonal temperature and sunshine under a single box with a single dual-chamber concrete box girder concrete box four chamber temperature distribution in the vertical and horizontal temperature distribution of the basic law . Summed up the impact of heat of hydration process of concrete box girder number of factors - concrete box girder cross-section in the form of concrete into the mold temperature , high- latitude regions such as low temperature and cold . To heat transfer theory as the basis, using Zhu Bofang massive concrete hydration heat release composite index formula applied ABAQUS finite element software , simulation analysis of a single dual-chamber concrete box girder hydration heat stage in the heat transfer process, and contrast analysis of the calculated temperature field and measured the temperature field , finally got the group applies to the calculation of concrete box girder hydration heat release coefficient composite index expressions , we propose a reasonable and feasible concrete box girder hydration heat temperature field calculation.

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CLC: > Transportation > Road transport > Bridges and Culverts > All kinds of bridges > Bridge: Structure > Beam bridge > Box girder bridge
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