第38第6期 2016年12月
土木建筑与环境工程
Journal of Civil,Architectural &.Environmental Engineering
doi:10.11835/j.issn. 1674-4764.2016.06. 013
钢砼组合结构PBH剪力键的疲劳性能
范亮1，闫龙彪1，吕娜
Vol. 38 No. 6 Dec.2016
（1.重庆交通大学土木工程学院，重庆400074；2.新乡职业技术学院建筑工程系，河南新乡453000）摘要：为了研究钢箱-砼组合结构中PBH剪力键在反复荷载作用下的疲劳性能，设计制作了PBH 剪力键试验模型，进行了24万次疲劳推出试验。在疲劳破坏形态和试验滑移及应变数据分析的基础上，利用数值工具开展肋板开孔孔径、穿入钢筋直径、混凝土强度3个参数的PBH剪力键疲劳寿命影响因素分析。研究表明：PBH剪力键的疲劳破坏形态与静载破坏相似，表观表现为混凝土面多处斜向劈裂裂缝、内部样孔混凝土压碎、穿入钢筋局部屈服；疲劳破坏演化过程分为疲劳损伤开始、发展、破坏3个阶段，其中疲劳发展阶段占整个疲劳阶段的91.7%，结构刚度在疲劳损伤开始和发展阶段退化较慢，在疲劳破坏阶段退化较快；肋板开孔孔径、穿入钢筋直径、混凝土强度3个参数
对PBH剪力键疲劳寿命影响均有明显影响，其中穿入钢筋直径对疲劳寿命的影响尤为突出。关键词：组合结构；剪力键；疲劳试验；疲劳寿命
中图分类号：TU398.9
文献标志码：A
文章编号：1674-4764(2016)06-0097-08
Fatigue performance analysis of steel concrete composite
structure PBH shear connectors Fan Liang',Yan Longbiao',Lyu Na?
( 1. College of Civil Engineering, Chongqing Jiaotong University, Chongqing 40o074, P. R. China,
2. Department of Civil Engineering, Xinxiang Vocational and Technical College, Xinxiang 453000, Henan, P. R. China) Abstract:PBH test model is designed and 240000 times fatigue tests were conducted to investigate the steel box-concrete composite structure of PBH shear connector under repeated load fatigue performance. The fatigue failure pattern and test data are analysed. Take advantage of the finite element software to analysis the floor opening aperture, wear into the steel bar diameter, concrete strength influence of the PBH fatigue. Results showed that the PBH's fatigue failure pattern is similar to static, which is concrete surface appear oblique splitting cracks, concrete tenor crushed, through the steel yield, Fatigue damage can be divided into beginning and development and damage three stages, the development stage accounted for 91. 7% of the whole fatigue stage, structural stiffness in the beginning and development stages degradation slower, fast during the damage stage. Three parameters are of great influence on the fatigue life of PBH, among them through the bar diameter's influence particularly prominent.
Keywords: steel-concrete composite structure; PBH shear connector; fatigue test; fatigue lifetime
收稿日期：2016-03-07
基金项目：国家自然科学基金（51308571）
作者简介：范亮（1979-），女，副教授，主要从事桥梁结构研究，（E-mail)fanliang2001@gmail.com， Received:2016-03-07
Foundation item:National Natural Science Foundation of China (No. 51308571)
Author brief:Fan Liang (1979- ), associate professor, main research interest: bridge structure, (E-mail) fanliang2001@
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