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为确定单榀拱撑内门架承载力,进行拱撑门架和MF1219门架承载力非线性有限元分析和拱撑门架承载力试验。利用ANSYS软件建立拱撑门架模型和MF1219门架模型,进行特征值屈曲分析,得到各计算模型的承载力。拱撑门架立杆低端铰接,在两立杆上端或上横杆拱形加强杆两端对应位置处进行分级竖向加载,进行了8榀拱撑门架承载力试验。选择JGJ 128—2010《建筑施工门式钢管脚手架安全技术规范》中门架承载力公式进行了单榀拱撑门架承载力计算,并对门架承载力有限元分析、试验和公式计算结果进行了比较。建议:拱撑门架宜立杆直接受力,拱撑门架立杆受力承载力可采用JGJ 128—2010中5.2.1-8a计算,拱撑门架上端横杆受力承载力折减系数宜取0.3。
In order to determine the bearing capacity of the single gantry inner mast, the nonlinear finite element analysis of the bearing capacity of arch gantry and MF1219 gantry and the bearing capacity test of arch gantry were carried out. ANSYS software was used to establish the model of arch gantry and MF1219 gantry, and the eigenvalue buckling analysis was carried out to obtain the bearing capacity of each model. The lower end of the upright pole of the arch support gantry is articulated, and the vertical loading is carried out at the corresponding positions of the upper ends of the two upright poles or the arched reinforcing rods of the upper crossbar. The bearing capacity test of the 8 榀 arched gantry is carried out. The calculation of the bearing capacity of single-arch arches is carried out by selecting the formula of the bearing capacity of the mast in JGJ 128-2010 “Code for Safety of Steel Door Scaffolding of Building Construction”. The results of the finite element analysis, experiment and formula calculation of the bearing capacity of the gantry are carried out Compare Suggestion: Arch support gantries should be directly under the force, arch gantry crane pole bearing capacity can be used JGJ128-2010 in the calculation of 5.2.1-8a, arch gantry lower bar transverse force bearing capacity reduction The coefficient should take 0.3.