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桥梁受到日照温度作用时,结构的内外表面形成较大温差,从而产生温度应力。为研究薄壁高墩的日照温度效应,对两座不同走向不同墩身截面形式的薄壁高墩桥梁进行了温度场测试,得出了不同薄壁截面形式的高墩温度场分布规律,拟合出温度场计算公式,揭示了桥梁走向对薄壁高墩日照温度效应的影响。结果表明:混凝土薄壁高墩的温度应力与桥梁的走向呈周期性变化,在0°~90°范围内,墩身纵桥向和竖向的温度应力随桥梁中轴线方位角的增大而增大;而横桥向的温度应力,在0°~45°范围内,随桥梁中轴线方位角的增大而增加,45°左右达到峰值,45°~90°后随之下降。
When the bridge sunshine temperature, the structure of the inner and outer surface to form a larger temperature difference, resulting in temperature stress. In order to study the sunshine temperature effect of thin-walled high piers, the temperature field of two thin-walled high piers with different piers with different pier shapes is tested and the distribution of temperature field of high piers with different thin-walled sections is obtained. The temperature field calculation formula is deduced to reveal the effect of the bridge strike on the temperature effect of thin-walled high pier sunshine. The results show that the temperature stress of the concrete thin-walled high pier changes periodically with the direction of the bridge. In the range of 0 ° -90 °, the longitudinal and vertical temperature stress of the pier increases with the increase of the azimuth of the bridge axis And the temperature stress in the transverse direction increases from 0 ° to 45 ° with the increase of the azimuth of the bridge axis, reaches the peak value of 45 °, and then decreases from 45 ° to 90 °.