简支C形钢檩条内嵌式连续化加固技术研究  

Study on lap length of existing simply supported C-beam purlin inline continuous reinforcement

作　　者：雷淑忠[1] 丰成成 LEI Shuzhong;FENG Chengcheng(School of Civil Engineering,Shandong Jianzhu University,Jinan 250101,China)

机构地区：[1]山东建筑大学土木工程学院,山东济南250101

出　　处：《山东建筑大学学报》2023年第6期10-15,共6页Journal of Shandong Jianzhu University

摘　　要：简支变连续加固方式是解决现有檩条加固方式用钢量大、施工效率低等问题的有效方法。采用有限元软件ABAQUS对不同跨度L的简支C形钢檩条内嵌式连续化加固,搭接长度系数α取值0.02~0.20,根据连续性指标β得出简支C形钢檩条合理的嵌套搭接长度,并对比分析简支C形钢檩条支座处采用螺栓连接和结构胶粘结两种连接方式的连接性能。结果表明:简支C形钢檩条内嵌式连续化加固的搭接长度宜≥10%L且当α取0.10时,内嵌式C形钢檩条的β能够达到90%且能够满足檩条加固要求;综合考虑简支C形钢檩条支座处两种连接方式的施工操作性和加固成本,简支C形钢檩条内嵌式连续化加固可优先选择螺栓连接。The simple support to continuous strengthening method proves to be an effective solution to solve the problems of existing purlin strengthening methods,such as large steel consumption and low construction efficiency.The finite element software ABAQUS is used to strengthen simply supported C-shaped steel purlins of different spans with embedded continuous reinforcement,and the lap length coefficientαtake 0.02~0.20,according to the continuity indexβ,and the reasonable lapping length of simply supported C-type steel purlins was obtained according to the continuity indexβ.And the connection performance of bolting connection and structural adhesive connectionat the support of simply supported C-shaped steel purlins is compared and analyzed.The results show that the lapping length of simply supported C-shaped steel purlin embedded continuous strengthening should be≥10%L,and when the lap length coefficientαtake 0.10,the continuity index of embedded C-shaped steel purlinβcan reach 90%and meet the purlin reinforcement requirements.Considering the construction operability and reinforcement cost of the two connection methods at the support of simply supported C-shaped steel purlin,the bolting connection can be preferentially selected for the embedded continuous reinforcement of simply supported C-shaped steel purlin.

关 键 词：简支C形钢檩条 连续化加固 嵌套搭接 有限元模拟 

分 类 号：TU391[建筑科学—结构工程]