（同济大学建筑工程系， 上海 200092）

［摘要］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。

［关键词］内爬式单管通信钢塔； 人孔； 贴板补强； 中加强圈补强； 足尺试验； 有限元分析

中图分类号：TU392-3文献标识码：A文章编号：1002-848X(2016)14-0064-06

Experimental study on manhole reinforced of steel inner-climbing single-tube communication steel tower

Luo Lie， Chen Qinglie， Cai Jiannan

（Department of Structural Engineering, Tongji University, Shanghai 200092, China）

Abstract:Setting large size manhole at the bottom of inner-climbing single-tube communication steel tower will have adverse effect on mechanical performance of the tower body and it needs reinforcement to improve. The field loading tests were conducted on two inner-climbing single-tube communication steel tower full-scale models with manholes strengthened by plate reinforcement and mid stiffening ring reinforcement respectively to obtain the manhole′s edge stress and analyze stress distribution characteristics. Through comparing the test data with the ANSYS finite element calculation results, the reliability of the finite element analysis was verified, and the reinforcing effect and the reinforcing efficiency of the two kinds of reinforcement methods were compared. The results of the study show that: after the application of the plate reinforcement and mid stiffening ring reinforcement, manhole′s edge peak stress decreases significantly and the area of high stress region decreases significantly. The reinforcement can effectively improve the mechanical properties of hole area, and mid stiffening ring reinforcement structure has better the reinforcing effect and higher reinforcement efficiency.

Keywords:inner-climbing single-tube communication steel tower; manhole; plate reinforcement; mid stiffening ring reinforcement; full-scale test; finite element analysis

作者简介：罗烈，博士，教授，一级注册结构工程师，Email：luolie@tongji.edu.cn。