UHPC带T形条带菱形接缝梁的抗弯性能研究  被引量:1

On Flexural Performance of the UHPC Rhombus Joint Beam with T-shape Strips

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作  者:贾依楠 曾田胜 胡美韵 晏班夫[1] JIA Yinan;ZENG Tiansheng;HU Meiyun;YAN Banfu(College of Civil Engineering, Hunan University, Changsha,Hunan 410082, China;Guangdong Gaoen Expressway Co., Ltd., Kaiping,Guangdong 529000, China)

机构地区:[1]湖南大学土木工程学院,湖南长沙410082 [2]广东高恩高速公路有限公司,广东开平529000

出  处:《公路工程》2021年第5期104-109,共6页Highway Engineering

基  金:湖南省2017科技重大专项项目(2017SK1010)。

摘  要:为了研究UHPC带T形条带菱形接缝梁的受弯性能,对有纵向腰筋接缝梁、无纵向腰筋接缝梁和无接缝完整梁进行了试验研究,得到了试验梁在纯弯作用下的受力性能。试验结果表明:有腰筋接缝梁与完整梁破坏形态相似,均发生跨中弯曲破坏,无腰筋接缝梁沿接缝界面发生拉裂破坏;有腰筋接缝梁开裂荷载较小,且延性好于无腰筋梁,整体上抗弯性能较好;无腰筋接缝梁抗弯性能最差。根据模型试验结果与相关文献研究成果,提出了UHPC带T形条带菱形接缝梁的抗弯承载力计算公式。In order to investigate the bending performance of UHPC T-shaped rhombic joint beams,this paper has carried out an experimental test on lumbar joint beams,lumbar joint beams without lumbar joint and complete beams without joint,and obtained the mechanical performance of the test beam under pure bending action.The test results show that the beam with lumbar joint and the complete beam have similar damage patterns,both occur in the middle cross section,and the beam without lumbar joint has tensile cracking damage along the joint interface.The bending resistance and cracking loads of the beam with lumbar joint are smaller than the other beams,and the comprehensive bending resistance is stronger,while the beam without lumbar joint has the worst bending resistance.According to the model test results,the paper proposes a formula for calculating the bending resistance capacity of UHPC T-shaped rhombic joints.

关 键 词:UHPC 湿接缝 带T形条带菱形接缝 试验研究 抗弯承载力计算 

分 类 号:U441[建筑科学—桥梁与隧道工程]

 

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