摘要
为研究超高性能混凝土(UHPC)预制拼装综合管廊在静力荷载作用下的抗剪承载力,通过分析现有箱型混凝土结构的抗剪计算方法,考虑钢纤维对结构的抗拉作用,提出UHPC预制拼装综合管廊抗剪承载力计算方法。结合对UHPC管廊双向荷载作用下的静力试验,对所提出的抗剪承载能力计算式进行分析、比较和验证。结果表明:考虑UHPC中钢纤维对于结构抗剪能力的贡献,参考箱型结构“内力拱”受力计算模型,计算得到的管廊试件破坏时顶板和侧墙抗剪承载力计算值与实测值较为接近,计算结果精度较高,计算误差在7%以内,较现有计算法的计算精度更高。
In order to study the shear bearing capacity of prefabricated UHPC utility tunnels under static loads,the shear resistance calculation method of existing box-shape concrete structures was analyzed,and the tensile effect of steel fibers on the structure was considered,and a shear bearing capacity calculation method of prefabricated UHPC utility tunnels was proposed.Combining with the static tests under The static test under the bidirectional loads on prefabricated UHPC utility tunnels,is further introduced,and the proposed calculation formula for the shear bearing capacity was analyzed,compared and verified.The results indicated that the theoretically calculated values of the shear bearing capacity of top plates and side walls for the utility tunnel structure in destruction under confining pressure,which was considered the contribution of steel fibers in UHPC to shear resistance of structures and was referred to calculated referring to the“internal force arch”calculation model of box-shaped structurs,and combineing with the tensile stress contributed by the steel fiber in the UHPC to shear of the structural.It is calculated that The theoretically calculated values of the roof and side walls for the utility tunnel specimens in damaged were relatively closer to the measured values in tests.The calculated results were more accurate,and the calculation errors were within 7%.Compared with the existing calculation methods,the proposed method was more accurate.the calculation accuracy is improved.
作者
陈树辉
夏樟华
吴泽霖
许有胜
呼明亮
朱三凡
CHEN Shuhui;XIA Zhanghua;WU Zelin;XU Yousheng;HU Mingliang;ZHU Sanfan(Jianyan Testing Group Co.,Ltd.,Xiamen Academy of Building Research Group,Xiamen 361004,China;College of Civil Engineering,Fuzhou University,Fuzhou 350108,China;Shenzhen Municipal Engineering Design Institute Co.,Ltd.,Shenzhen 518038,China)
出处
《工业建筑》
北大核心
2023年第5期158-164,共7页
Industrial Construction
基金
福建省自然科学基金项目(2020J01477)
厦门市建设局科技项目(XJK2020-1-8)
福州市科技成果转移转化项目(2020-GX-18)。
