双层均布荷载作用下混凝土伸臂箱梁剪力滞效应试验研究
发布时间：2019-05-14 21:22
【摘要】：通过对大比例双层均布荷载作用下单箱三室混凝土伸臂箱梁在弹性范围内的抗弯性能模型试验研究与分析,探讨了双层均布荷载作用下单箱三室混凝土伸臂箱梁剪力滞效应分布规律:在不同荷载工况作用下,其伸臂根部产生正剪力滞效应,1/2伸臂处产生负剪力滞效应;正、负剪力滞临界位置离伸臂根部的距离是伸臂长度的18%~23%,其中在顶板均布加载作用下产生的剪力滞效应最明显,正、负剪力滞临界位置离伸臂根部最近,顶板、底板同时均布加载作用下次之,而底板均布加载作用下最弱;该双层交通混凝土伸臂箱梁抗弯结构在设计时,按照顶板均布加载时产生的剪力滞效应考虑偏安全。
[Abstract]:Based on the model test and analysis of the bending behavior of single box and three chamber concrete extended arm box girder under the action of large proportion double layer uniform load, the bending behavior of single box and three chamber concrete extended arm box girder in elastic range is studied and analyzed. The distribution of shear lag effect of single box and three chamber concrete extensor box girder under double uniform load is discussed. Under different load conditions, the root of the extension arm produces positive shear lag effect, and the negative shear lag effect occurs at the extension arm of 1 / 2. The distance between the critical position of positive and negative shear lag and the root of the extension arm is 18% 鈮，
本文编号：2477058
[Abstract]:Based on the model test and analysis of the bending behavior of single box and three chamber concrete extended arm box girder under the action of large proportion double layer uniform load, the bending behavior of single box and three chamber concrete extended arm box girder in elastic range is studied and analyzed. The distribution of shear lag effect of single box and three chamber concrete extensor box girder under double uniform load is discussed. Under different load conditions, the root of the extension arm produces positive shear lag effect, and the negative shear lag effect occurs at the extension arm of 1 / 2. The distance between the critical position of positive and negative shear lag and the root of the extension arm is 18% 鈮，
本文编号：2477058
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