角钢T形组合截面压弯构件受力性能试验研究

引用文献:

刘云贺 辛振科 梁刚 郭宏超 耿娜娜. 角钢T形组合截面压弯构件受力性能试验研究[J]. 建筑结构,2022,48(24):57-63.

LIU Yunhe XIN Zhenke LIANG Gang GUO Hongchao GENG Nana. Experimental study on mechanical behavior of angle steel T-shaped composite area press-bending members[J]. Building Structure,2022,48(24):57-63.

作者:刘云贺 辛振科 梁刚 郭宏超 耿娜娜
单位:西安理工大学水利水电学院 西北旱区生态水利国家重点实验室 西安理工大学土木建筑工程学院
摘要:针对输电塔加固的现实需求,提出了一种新型角钢T形组合截面原位加固方案。设计了9个压弯构件,试验研究了长细比、夹具数量、螺栓排数等参数对角钢T形组合截面构件破坏模式和承载性能等的影响规律。结果表明:加固后构件极限承载力提高57%~82%;长细比与极限承载力之间呈明显的负相关关系;夹具位置靠近构件中部加固效果较好;双排螺栓加固效果优于单排螺栓;采用《架空输电线路杆塔结构设计技术规定》(DL/T 5154—2012)预测的构件承载力较试验结果保守,为此给出了一种适用于预测组合截面构件极限承载力的计算方法。
关键词:角钢;T形组合截面;承载力;压弯构件;输电塔;加固;
作者简介:刘云贺,博士,教授,博士生导师,主要从事防灾减灾、结构抗震、水工沥青混凝土、土石坝安全控制理论等方面的研究,Email:liuyunhe1968@163.com。梁刚,博士,讲师,主要从事钢结构抗震与新型结构体系的研究,Email:lg20854007@163.com。
基金:国家自然科学基金项目(51978571);中国博士后科学基金(2022M712562);陕西省自然科学基金项目(2020JQ-628);陕西省教育厅项目(21JK0795)。
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Experimental study on mechanical behavior of angle steel T-shaped composite area press-bending members
LIU Yunhe XIN Zhenke LIANG Gang GUO Hongchao GENG Nana
(Institute of Water Resources and Hydropower, Xi'an University of Technology State Key Laboratory of Eco-hydraulic in Northwest Arid Region College of Civil and Architecture Engineering, Xi'an University of Technology)
Abstract: According to the actual needs of transmission tower reinforcement, a new in-situ reinforcement scheme of angle steel T-shaped composite area was proposed. Nine press-bending members were designed, and the effects of slenderness, the number of fixtures, the number of bolt rows and other parameters on the failure mode and bearing performance of angle steel T-shaped composite area members were studied by test. The results show that the ultimate bearing capacity of the reinforced member is increases by 57%~82%; there is an obvious negative correlation between the slenderness and the ultimate bearing capacity; the reinforcement effect is better when the fixture is located near the middle of the member; the reinforcement effect of double-row bolts is better than that of single-row bolts; the predicted bearing capacity of the member using the Technical code for the design of tower and pole structures of overhead transmission line(DL/T 5154—2012) is conservative compared with the test results, and a calculation method is given for predicting the ultimate bearing capacity of the combined area member.
Keywords: angle steel; T-shaped composite area; bearing capacity; press-bending member; transmission tower; reinforcement
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