【摘要】：通過對大比例雙層均布荷載作用下單箱三室混凝土伸臂箱梁在彈性范圍內(nèi)的抗彎性能模型試驗研究與分析,探討了雙層均布荷載作用下單箱三室混凝土伸臂箱梁剪力滯效應(yīng)分布規(guī)律:在不同荷載工況作用下,其伸臂根部產(chǎn)生正剪力滯效應(yīng),1/2伸臂處產(chǎn)生負剪力滯效應(yīng);正、負剪力滯臨界位置離伸臂根部的距離是伸臂長度的18%~23%,其中在頂板均布加載作用下產(chǎn)生的剪力滯效應(yīng)最明顯,正、負剪力滯臨界位置離伸臂根部最近,頂板、底板同時均布加載作用下次之,而底板均布加載作用下最弱;該雙層交通混凝土伸臂箱梁抗彎結(jié)構(gòu)在設(shè)計時,按照頂板均布加載時產(chǎn)生的剪力滯效應(yīng)考慮偏安全。
[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，

本文編號：2477058