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The Study of Temperature Effects on Harbin Sifangtai Bridge

Author: XuFeng
Tutor: ZhangHaiLong
School: Huazhong University of Science and Technology
Course: Bridge and Tunnel Engineering
Keywords: Cable-stayed bridge Non - steady-state heat conduction Composite beam Temperature field TEMPERATURE STRESS
CLC: U441.5
Type: Master's thesis
Year: 2005
Downloads: 154
Quote: 2
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Abstract


The bridge structure year-round exposure to the natural environment , temperature, sunlight and other factors directly affect the internal forces of the bridge structure . This internal force caused by the temperature sometimes exceeds by constant contained due to internal forces , in the design and construction of which can not be ignored . In this paper, of Harbin Sifangtai Bridge for the study, a detailed analysis of the temperature effect of the internal forces of the bridge . As a composite beam cable-stayed bridge , the main beam of the the Sifangtai Bridge concrete carriageway board by the lower part of the I-beam and the upper part of the combination . I-beam and the concrete carriageway board by the shear key linking to work together , and thus the thermal properties of steel and concrete differences lead to the composite beam cable-stayed bridge is a major cause of temperature of the internal force . Start from the finite element solution of the unsteady temperature field theory and thermal engineering manuals at home and abroad , the use of solar radiation data , according to the third boundary condition to Sifangtai Bridge composite beam and the main tower a standard cross-section the applied boundary temperature load , obtained using ANSYS software a standard cross-sectional temperature field of the law change over time . Using indirect coupling , that the temperature field as the temperature load together with the dead load applied to the same calculated using ANSYS to establish a full-bridge model , and then comparing the control sections Nei Lizhi and only consider dead load calculation Nei Lizhi get to weigh the proportion of the temperature internal forces in total Nei Lizhi . The temperature load text is divided into sunshine temperature difference between the temperature difference between the system of the uniform changes and uneven changes both cases to be considered . In the finite element model of the full-bridge , for the construction of the main beam and bridge tower shell elements can be layered SHELL91 temperature distribution in any form in the direction of the thickness of the shell element become a possible and the simulation results more apparent. This article seeks to simulation values ??compared with normative values ??or measured value of the temperature effect of the composite beam cable-stayed bridge with a more objective and comprehensive evaluation .

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CLC: > Transportation > Road transport > Bridges and Culverts > Structural principles, structural mechanics > Stress analysis, thermal stress
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