加速锈蚀后预应力混凝土方桩连接接头抗拉性能研究

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发布时间：2020-01-06 00:00:00

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加速锈蚀后预应力混凝土方桩连接接头抗拉性能研究

Study on Tensile Performance of Connection Joints of Prestressed Concrete Square Pile After Accelerated Corrosion

2022年第4期

预应力混凝土方桩；连接接头；弹卡式连接；加速锈蚀；耐久性；抗拉性能

Prestressed concrete square pile; Connection joint; Elastic clip connection; Accelerated corrosion; Durability; Tensile performance

2022年第4期

10.19761/j.1000-4637.2022.04.036.06

浙江省重点研发计划项目（2018C03033-1）；住房和城乡建设部科技项目（2019-K-046)。

樊华1，徐铨彪2,3，陈刚2,3，陈虹霖4，龚顺风4

1.嘉兴欣创混凝土制品有限公司，浙江嘉兴 314109；2.浙江大学平衡建筑研究中心，浙江杭州 310028；3.浙江大学建筑设计研究院有限公司，浙江杭州 310028；4.浙江大学土木工程学系，浙江杭州 310058

樊华1，徐铨彪2,3，陈刚2,3，陈虹霖4，龚顺风4

樊华,徐铨彪,陈刚,等.加速锈蚀后预应力混凝土方桩连接接头抗拉性能研究[J].混凝土与水泥制品,2022(4):36-41.

FAN H,XU Q B,CHEN G,et al.Study on Tensile Performance of Connection Joints of Prestressed Concrete Square Pile After Accelerated Corrosion[J].China Concrete and Cement Products,2022(4):36-41.

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摘要：为研究氯盐环境下预应力混凝土方桩连接接头的耐久性能，对弹卡式与焊接式连接方桩接头试件进行了通电加速锈蚀试验，并对劣化后两种接头试件和预应力钢棒分别进行了抗拉性能试验。结果表明：劣化后弹卡式连接接头试件整体连接性能较好，破坏形式为桩身裂缝开展充分，接头连接完好，下节桩预应力钢棒被拉断；焊接式连接接头试件在焊缝处锈蚀相对严重，轴向开裂拉力下降幅度较大，破坏形式为接头焊缝处被拉开，两侧端板完全脱离，桩身未出现裂缝；两种接头形式劣化后预应力钢棒材料力学性能下降均在10%以内。 Abstract: To study the durability of connection joints of prestressed concrete square pile in chlorine salt environments, the electrical accelerated corrosion tests were conducted on the connection joint specimens of prestressed concrete square piles using elastic clip connection and welded connection, and then the tensile behavior tests of two types of square pile connection joint specimens and the prestressing steel rods were also conducted, respectively. The results show that the deteriorated square pile joint specimens with elastic clip connection have good overall connection performance and more durability. The failure mode is that the cracks in the pile body are fully developed, the joint connection is intact, and the prestressed steel rods of the lower pile are pulled off. However, the weld seam at the connection joints for the welded connection square pile specimens are corroded seriously, and the axial cracking tensile force declines greatly. The failure mode is that there is no crack in the pile body, the weld seam at the joint connection is pulled apart and the end plates on both sides are completely detached. The mechanical properties of the prestressed steel rods decreases within 10%.

英文名 : Study on Tensile Performance of Connection Joints of Prestressed Concrete Square Pile After Accelerated Corrosion

刊期 : 2022年第4期

关键词 : 预应力混凝土方桩；连接接头；弹卡式连接；加速锈蚀；耐久性；抗拉性能

Key words : Prestressed concrete square pile; Connection joint; Elastic clip connection; Accelerated corrosion; Durability; Tensile performance

刊期 : 2022年第4期

DOI : 10.19761/j.1000-4637.2022.04.036.06

文章编号 :

基金项目 : 浙江省重点研发计划项目（2018C03033-1）；住房和城乡建设部科技项目（2019-K-046)。

作者 : 樊华1，徐铨彪2,3，陈刚2,3，陈虹霖4，龚顺风4

单位 : 1.嘉兴欣创混凝土制品有限公司，浙江嘉兴 314109；2.浙江大学平衡建筑研究中心，浙江杭州 310028；3.浙江大学建筑设计研究院有限公司，浙江杭州 310028；4.浙江大学土木工程学系，浙江杭州 310058

樊华1，徐铨彪2,3，陈刚2,3，陈虹霖4，龚顺风4

樊华,徐铨彪,陈刚,等.加速锈蚀后预应力混凝土方桩连接接头抗拉性能研究[J].混凝土与水泥制品,2022(4):36-41.

FAN H,XU Q B,CHEN G,et al.Study on Tensile Performance of Connection Joints of Prestressed Concrete Square Pile After Accelerated Corrosion[J].China Concrete and Cement Products,2022(4):36-41.

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摘要

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参考文献

引用本文

Abstract: To study the durability of connection joints of prestressed concrete square pile in chlorine salt environments, the electrical accelerated corrosion tests were conducted on the connection joint specimens of prestressed concrete square piles using elastic clip connection and welded connection, and then the tensile behavior tests of two types of square pile connection joint specimens and the prestressing steel rods were also conducted, respectively. The results show that the deteriorated square pile joint specimens with elastic clip connection have good overall connection performance and more durability. The failure mode is that the cracks in the pile body are fully developed, the joint connection is intact, and the prestressed steel rods of the lower pile are pulled off. However, the weld seam at the connection joints for the welded connection square pile specimens are corroded seriously, and the axial cracking tensile force declines greatly. The failure mode is that there is no crack in the pile body, the weld seam at the joint connection is pulled apart and the end plates on both sides are completely detached. The mechanical properties of the prestressed steel rods decreases within 10%.

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加速锈蚀后预应力混凝土方桩连接接头抗拉性能研究

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