影响渡槽横杆受力的因素

Factors Affecting the Stresses of Crossbars on the Aqueduct

渡槽槽顶横杆(拉杆或撑杆)可以改善渡槽横向受力条件。为了充分利用横杆的性能,使其对渡槽应力产生有益的作用,并且在结构安全的条件下尽可能地满足经济性的要求,有必要对横杆受力情况进行研究。论文利用有限元法计算了简支梁式加肋矩形渡槽槽顶横杆的受力,考虑了三种影响因素,即不同的高宽比、不同的水深和不同的横杆间距。得出了渡槽横杆轴力随渡槽高宽比H/B、水深及横杆间距改变时的变化规律,以及横杆轴力对于渡槽槽身应力影响的规律。

The transverse loading condition of the aqueduct can be improved by crossbars on the top of the aqueduct.So it is necessary to study the loading condition of crossbar for making full use of the performance,in order to bring about beneficial effect for the distribution of aqueduct stress and meeting the requirement of economical efficiency as far as possible under the condition of structure safety.Using the finite element method,the axial stresses of crossbars on the top of rectangular aqueducts with simply supports were calculated under different ratios of height to width,different values of water depth,and different values of distance between crossbars.And the variation disciplines of axial stresses of crossbars are obtained under different ratios of height to width,different values of water depth and different values of distance between crossbars.