配备超高性能混凝土护套的混凝土圆柱的弹性约束效应：一项分析与试验研究

Elastic Restraint Effect of Concrete Circular Columns with Ultrahigh-Performance Concrete Jackets: An Analytical and Experimental Study.

作者信息

Alsomiri Mujahed, Jiang Xiaofang, Liu Zhao

机构信息

School of Civil Engineering, Southeast University, Nanjing 210018, China.

Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, School of Civil Engineering, Southeast University, Nanjing 210018, China.

出版信息

Materials (Basel). 2021 Jun 14;14(12):3278. doi: 10.3390/ma14123278.

DOI:10.3390/ma14123278

PMID:34198525

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8231830/

Abstract

Concrete circular columns are among the most common vertical load-bearing members in structural engineering. Because of the change of service loads or environmental factors, the strengthening of deteriorated members is often demanded to restore and maintain their performance. In view of the limitations of the traditional strengthening methods and the superior mechanical properties of the new material, ultra-high-performance concrete (UHPC), this study analyzed the stress-strain state of concrete circular columns confined by UHPC jackets under axial compression in the elastic stage. Since elastic analysis is the basis for the service limit state design, the elastic stress solution was derived through the theory of elasticity, and experimental verification of the effectiveness of the UHPC jackets in circular concrete columns was performed. Theoretical bases and references for practical strengthening works are provided.

摘要

混凝土圆柱是结构工程中最常见的竖向承重构件之一。由于使用荷载或环境因素的变化，经常需要对受损构件进行加固，以恢复和保持其性能。鉴于传统加固方法的局限性以及新型材料超高性能混凝土（UHPC）优越的力学性能，本研究分析了在弹性阶段，采用UHPC套管约束的混凝土圆柱在轴向受压时的应力应变状态。由于弹性分析是正常使用极限状态设计的基础，通过弹性理论推导了弹性应力解，并对UHPC套管在圆形混凝土柱中的有效性进行了试验验证。为实际加固工程提供了理论依据和参考。