Effective stress measurement and evaluation method of steel strands in prestressed concrete structures

被引：0

作者：

Rong Q. ^{[1
,2
]}

Wang X. ^{[2
]}

Hou X. ^{[2
]}

Zheng W. ^{[2
]}

机构：

[1] School of Architecture and Civil Engineering, Harbin University of Science and Technology, Harbin

[2] Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin

来源：

Jianzhu Jiegou Xuebao/Journal of Building Structures | 2020年 / 41卷 / 08期

关键词：

Effective stress; Loading and unloading tensile test; Prestressed concrete structure; Slant axial strain; Steel strand;

D O I：

10.14006/j.jzjgxb.2017.0715

中图分类号：

学科分类号：

摘要：

The effective stress of steel strand in prestressed concrete structure is a key factor that determines the bearing capacity and safety of prestressed structures. To measure the effective stress of the steel strand in prestressed concrete structure, a method which involves the measurement of the unloading slant axial strain with an additional correction factor K was proposed. The loading and unloading tensile tests of steel strands at the stress level of 0.32-0.74 were conducted. Based on the test results, the relationship on effective stress wtih unloading axial strain and slant axial strain was proposed. The test results show that, the error of the steel strand stress calculated based on the axial strain is large. The calculated stress values of the steel strand matched well with the measured slant axial strain multiplied by the correction factor. Based on the test results, the value of the correction factor K of the slant axial strain was determined to be 1.1. © 2020, Editorial Office of Journal of Building Structures. All right reserved.

引用

页码：176 / 182

页数：6

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