Mechanical properties of circular thin-tubed molybdenum tailing concrete stubs

被引：22

作者：

Gao, Shan ^{[1
,2
]}

Zhao, Guohao ^{[1
]}

Guo, Lanhui ^{[3
]}

Zhou, Linqiang ^{[1
]}

Cui, Xiaowei ^{[4
]}

Yang, Haipeng ^{[1
]}

机构：

[1] Xijing Univ, Shaanxi Key Lab Safety & Durabil Concrete Struct, Xian 710123, Peoples R China

[2] Chongqing Univ, Postdoctoral Stn Civil Engn, Chongqing 400000, Peoples R China

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

[4] Shangluo Univ, Shaanxi Key Lab Comprehens Utilizat Tailings Reso, Shangluo 726000, Peoples R China

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2021年 / 268卷

基金：

中国国家自然科学基金;

关键词：

Molybdenum tailing; Fine aggregates; Thin-tubed concrete; Stub column; Axial behavior; RECYCLED AGGREGATE CONCRETE; STRESS-STRAIN BEHAVIOR; STRENGTH; WASTE; CONSTRUCTION; PERFORMANCE; FINE; COLUMNS; MODEL; IMPROVEMENT;

D O I：

10.1016/j.conbuildmat.2020.121215

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The configuration of thin-tubed concrete is a preferable method to enhance the mechanical properties of concrete. In this paper, the axial behavior of circular thin-tubed molybdenum tailing concrete (TTMoTC) stubs is experimentally and theoretically studied in detail by considering the molybdenum tailing (MoT) replacement ratio and concrete grade. The results show that EC4-04 model is the most reliable model to predict the elastic modulus of molybdenum tailing concrete by using the corresponding compressive strength. The usage of MoT in the core concrete has little effect on the failure modes of thin-tubed concrete stubs and concrete-filled tubes. An approximate linear degradation trend is noticed on the axial strength of TTMoTC. Increasing the MoT replacement ratio would reduce the ultimate displacement, rather than the ductility index of the stubs, regardless of concrete grade. A uniaxial compressive constitutive model for the TTMoTC stubs is proposed and validated. Based on the proposed design method for TTMoTC stub, a full-range prediction analysis is performed. (C) 2020 Elsevier Ltd. All rights reserved.

引用

页数：13

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