Structural state of stress analysis of confined concrete based on the normalized generalized strain energy density

被引：11

作者：

Hou, Chongchi ^{[1
,2
,3
]}

Zheng, Wenzhong ^{[1
,2
,3
]}

Wu, Xiaohao ^{[1
,2
,3
]}

机构：

[1] Harbin Inst Technol, Sch Civil Engn, Harbin 150090, Peoples R China

[2] Harbin Inst Technol, Key Lab Struct Dynam Behav & Control, Minist Educ, Harbin 150090, Peoples R China

[3] Harbin Inst Technol, Key Lab Smart Prevent & Mitigat Civil Engn Disast, Minist Ind & Informat Technol, Harbin 150090, Peoples R China

来源：

JOURNAL OF BUILDING ENGINEERING | 2020年 / 31卷

基金：

中国国家自然科学基金;

关键词：

Confined concrete; Normalized generalized strain energy density; Failure load; Stress state; Characteristic curve; AXIAL COMPRESSIVE BEHAVIOR; STRENGTH; COLUMNS; REINFORCEMENT; MODEL;

D O I：

10.1016/j.jobe.2020.101321

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This paper investigates the behavior of 32 high-strength concrete square columns confined by high-strength transverse reinforcement under concentric compression, by applying structural state of stress theory. First, the sum of generalized strain energy density values (E-ij) of columns at every load value (F-j) is normalized as E-j, norm to describe the structural state of stress. Then, the E-j,E-norm-F-j curves reveal the characteristics of the state of stress and failure mechanism of confined concrete columns under load-bearing condition. The E-j,E-norm-F-j curves also reveal an updated failure load definition and failure criterion. Furthermore, the effects of unconfined concrete compressive strength, volumetric ratio, and transverse reinforcement yield strength on the state of stress are studied. Finally, a formula is proposed to predict the updated failure loads of confined concrete columns. In summary, a novel method to identify some working characteristics of structures is explored.

引用

页数：9

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