吉林大学学报(工学版) ›› 2023, Vol. 53 ›› Issue (5): 1390-1399.doi: 10.13229/j.cnki.jdxbgxb.20220603

• 交通运输工程·土木工程 • 上一篇    

管幕预筑结构构件受弯性能试验

张艳青1,2(),吕宇宣2,韩石2,3(),尤龙飞2,曾俊2,侯飞阳2   

  1. 1.道路与铁道工程安全保障省部共建教育部重点实验室（石家庄铁道大学），石家庄 050043
    2.石家庄铁道大学 土木工程学院，石家庄 050043
    3.新疆生产建设兵团兴新职业技术学院 建筑与水利工程学院，新疆维吾尔自治区 铁门关 841007
  • 收稿日期:2022-05-18 出版日期:2023-05-01 发布日期:2023-05-25
  • 通讯作者: 韩石 E-mail:zhangyanqingtaian@stdu.edu.cn;hanshi1998@163.com
  • 作者简介:张艳青（1983-），女，讲师，博士.研究方向：钢筋混凝土结构.E-mail：zhangyanqingtaian@stdu.edu.cn
  • 基金资助:
    国家自然科学基金青年科学基金项目(52008271);河北省大学生创新创业项目(S202010107080)

Experimental research on flexural performance of tubular roof prefabricated structural components

Yan-qing ZHANG1,2(),Yu-xuan LYU2,Shi HAN2,3(),Long-fei YOU2,Jun ZENG2,Fei-yang HOU2   

  1. 1.Key Laboratory of Roads and Railway Engineering Safety Control （Shijiazhuang Tiedao University），Ministry of Education，Shijiazhuang 050043，China
    2.School of Civil Engineering，Shijiazhuang Tiedao University，Shijiazhuang 050043，China
    3.School of Architecture and Water Conservancy Engineering，Bingtuan Xingxin Vocational and Technical College，Tiemenguan 841007，China
  • Received:2022-05-18 Online:2023-05-01 Published:2023-05-25
  • Contact: Shi HAN E-mail:zhangyanqingtaian@stdu.edu.cn;hanshi1998@163.com

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摘要：

以连接件设置为参数，对管幕预筑结构构件的受弯性能进行试验研究，通过观察试件的裂缝发展及破坏形态，量测试件的荷载、挠度、应变，研究管幕预筑结构的受力机理，分析连接件的设置对管幕预筑结构构件受弯性能的影响。试验结果表明：管幕预筑结构受弯构件与等截面双钢板混凝土受弯构件的破坏过程及受力机理有较大差别，其破坏一般出现在钢管与平钢板相交的位置，源于钢管幕在弧形钢管与平钢板相交的凹角处有被拉平的趋势，破坏始于对拉筋及立柱的屈服，终于钢管幕与混凝土完全分离后钢板的屈服；设置对拉钢筋连接件可大幅度提升管幕预筑结构受弯构件的力学性能。

关键词: 地下工程, 管幕预筑结构, 受弯性能, 连接件, 承载力

Abstract:

Taking the setting of connectors as parameters， an experimental study on the flexural performance of pipe curtain prefabricated structural members was conducted in this paper. The crack development and failure mode of specimens were observed， and the load， deflection and strain of the specimens were measured. Based on the test results， the stress mechanism of tubular roof prefabricated （TRP） structures was studied， and the influence of connectors on the flexural performance of TRP structural members was analyzed. The results show that the failure process and stress mechanism of flexural members in the TRP structures are quite different from that of the equal section double steel plate concrete flexural members. The failure of flexural members in the TRP structures generally occurs at the intersection of steel pipe curtains and steel plates， which is due to the tendency of the steel plate part to be pulled outward by arc steel pipe part in the steel pipe curtain. The failure starts from the yielding of transverse reinforcement， and ends at the yielding of steel pipe curtain after it is completely separated from the concrete. The setting of bi-steels can improve the mechanical properties of flexural members of TRP structures.

Key words: underground engineering, tubular roof prefabricated structure, flexural performance, connector, bearing capacity

中图分类号: 

  • TU375.1

图1

管幕预筑结构"

图2

试件设计"

图3

试验现场"

图4

测点布置图"

图5

试件VSCF1破坏形态"

图6

VSCF2 试件破坏形态"

图7

试件VSCF3 破坏形态"

图8

荷载-跨中挠度曲线"

表1

特征点荷载和挠度"

编号Pcr/kN△cr/mmPy/kN△y/mmPf/kN
VSCF136.000.6769.405.05110.10
VSCF237.000.3574.903.75109.10
VSCF334.000.41108.705.57162.00

图9

立柱荷载-应变曲线"

图10

试件VSCF3对拉钢筋荷载-应变曲线"

图11

跨中截面钢板荷载-应变曲线"

图12

纵向对称轴上不同位置钢板应变变化"

图13

跨中钢板变形"

图14

试件VSCF2开裂截面荷载应变"

图15

试件VSCF3混凝土截面应变"

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