论文部分内容阅读
在混凝土薄壁箱梁模型抗弯性能全过程试验研究的基础上,重点分析了混凝土薄壁箱梁抗弯挠度变形与裂缝分布规律.通过试验证实了混凝土薄壁箱梁在正常使用极限状态下,最大裂缝宽度和跨中挠度均满足规范要求,其开裂弯矩按GB 50010-2002规范公式计算与实测值吻合良好;将混凝土薄壁箱梁截面等效为工字型截面,其平均裂缝间距、最大裂缝宽度和跨中挠度验算,按GB 50010-2002规范或JTG D62-2004规范公式进行验算均与实测值吻合良好;考虑翼缘宽度折减后,其计算结果更加接近实测值,但相差在5%以内,在实际工程设计中可以不考虑其影响.图5,表3,参12.
Based on the experimental research on the whole process of bending behavior of concrete thin-walled box girder, the deformation and crack distribution of the bending of concrete thin-walled box girder are analyzed emphatically.The test results show that under the normal use limit condition, the maximum Crack width and mid-span deflection meet the requirements of the specification. The cracking moment according to the formula of GB 50010-2002 is in good agreement with the measured value. The cross-section of concrete thin-walled box girder is equivalent to I-shaped cross section, and the average crack spacing is the largest Crack width and mid-span deflection checking, according to GB 50010-2002 norms JTG D62-2004 norms formula for checking and measured values are in good agreement with; consider the reduction of flange width, the calculation results closer to the measured value, but a difference of 5 %, Within the actual project design can not consider the impact of Figure 5, Table 3, reference 12.