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内爬式单管通信钢塔底部设置大尺寸人孔会对塔体受力性能产生不利影响,需要通过补强来改善。通过两个对人孔分别采用贴板补强和中加强圈补强的单管通信塔足尺模型的现场加载试验,实测获得了人孔周边的应力,分析了应力分布特点。经过将试验数据与ANSYS有限元计算结果进行对比分析,验证了有限元分析的可靠性,同时比较了贴板和中加强圈两种补强构造的补强效果与补强效率。研究结果表明:经贴板补强或中加强圈补强后,人孔周边的峰值应力下降明显,高应力区域面积显著减小,能够有效改善开孔区的受力性能,且中加强圈补强构造具有更好的补强效果和更高的补强效率。
The large-size manhole at the bottom of the single-tube communication steel tower inside the tower can have an adverse effect on the mechanical properties of the tower body and needs to be improved through reinforcement. The stress of the perimeter of the manhole was measured and the stress distribution characteristics were analyzed through two on-site loading tests on the full-scale model of the single-tube communication tower with two man-holes reinforced respectively with plate reinforcement and middle reinforcement. After comparing the experimental data with the ANSYS finite element analysis results, the reliability of the finite element analysis is verified, and the reinforcing effect and the reinforcing efficiency of the two reinforcing structures are compared. The results show that the peak stress around the manhole decreases obviously and the area of the high stress area decreases obviously after the reinforcement of the plaster board or the reinforcement of the middle reinforcement ring, which can effectively improve the stress performance of the open hole area, Strong structure has better reinforcing effect and higher reinforcing efficiency.