雙肢薄壁墩溫度效應(yīng)仿真分析
[Abstract]:With the rapid development of highway and high-speed railway construction in China, bridge traffic construction gradually extends to deep mountain canyons. In the deep mountain gorge, the continuous rigid frame bridge with high piers and long span is a very competitive bridge type, and the two-leg thin-walled pier is a bridge pier with the characteristics of bearing force, which leads to a large number of applications. In the deep mountain canyon, the temperature difference of sunlight is large, and the relative temperature change of thin-walled concrete structure is sensitive. Therefore, it is of great practical significance and scientific research value to study the temperature field and temperature difference effect of double-legged thin-walled hollow high pier. At the same time, using the secondary development function of ANSYS finite element software, a special program for the calculation of sunshine temperature field of two-leg thin-walled pier is developed, and the temperature field is simulated and analyzed, and the measured value is compared with the calculated value. The temperature difference effect of the two piers is simulated and analyzed by using the development results. The calculation results show that the temperature stress and deformation of the double pier under the action of sunshine temperature difference load are very large and can not be ignored. At the same time, the temperature field distribution of two-leg thin-walled pier is obtained. Secondly, the influence of two-leg thin-walled pier on the temperature field under the condition of changing section shape, boundary condition and the thickness of pier wall is calculated and analyzed, and the effect of sunshine temperature load on long-span bridge structure with high piers is summarized and analyzed. Some effective measures to reduce the temperature difference stress, the displacement of the pier top and the crack are put forward. The conclusion can provide a reference for the design and construction of this type of pier.
【學(xué)位授予單位】:石家莊鐵道大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2015
【分類號】:U441.5
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