风载作用下脚手架立杆段弯矩计算式分析

发布时间：2018-06-02 03:26

本文选题：风荷载 + 扣件式钢管脚手架　；参考：《建筑结构》2016年S1期

【摘要】：为研究现行《建筑施工扣件式钢管脚手架安全技术规范》(JGJ 130—2011)中风荷载作用下立杆弯矩计算公式是否合理,利用ANSYS对脚手架进行模拟分析,分析当脚手架所处高度分别为100m、200m、300m时,脚手架连墙件布置方式分别为"一步一跨"、"两步两跨"、"两步三跨"的情况下立杆的最大弯矩标准值。将计算得到的弯矩标准值作对比分析,得出连墙件布置方式不同时立杆最大弯矩标准值相差较大,差距不容忽视。将三种不同连墙件布置情况下得到的弯矩标准值与按照规范计算式所得弯矩标准值做对比,发现规范中所给计算式仅适用于连墙件布置为"一步一跨"的情况,对于连墙件的其他布置情况并不适用,规范计算式对立杆的弯矩计算存在危险设计,因此提出应对规范中风载作用下立杆弯矩的计算公式进行修正。
[Abstract]:In order to study whether the current formula for calculating the bending moment of steel tube scaffolding under stroke load is reasonable or not, ANSYS is used to simulate the scaffold. When the height of the scaffold is 100m ~ 200mm ~ 300m, the maximum bending moment standard value of the stand is analyzed under the conditions of "one step, one span", "two steps and two spans" and "two steps and three spans", respectively, when the scaffolding is attached to the wall in the form of "one step one span", "two step two span" and "two step three span". By comparing and analyzing the calculated standard values of bending moment, it is concluded that the difference of standard values of maximum bending moment of connecting wall parts at different time is quite large, and the difference can not be ignored. By comparing the standard values of bending moment obtained under three different arrangement of wall parts with the standard values of bending moment obtained from the formula of code calculation, it is found that the formula given in the code is only suitable for the case of "one step, one span" arrangement of connecting wall parts. It is not suitable for other arrangement of connecting wall parts, and the formula of code calculation has dangerous design for the moment calculation of vertical rod. Therefore, the formula for calculating bending moment of standing rod under the action of standard stroke load should be revised.
【作者单位】：沈阳建筑大学土木工程学院;
【基金】：辽宁省自然科学基金(2013020143)
【分类号】：TU731.2;TU312.1

【相似文献】