钢筋碱式硫酸镁混凝土梁斜拉破坏的试验研究

硅酸盐通报 ›› 2022, Vol. 41 ›› Issue (4): 1285-1292.

钢筋碱式硫酸镁混凝土梁斜拉破坏的试验研究

曾翔超¹, 余红发²

1.长江师范学院土木工程学院,重庆 408100;
2.南京航空航天大学土木工程系,南京 210016

收稿日期:2021-11-02 修回日期:2022-02-07 出版日期:2022-04-15 发布日期:2022-04-27
通讯作者: 余红发,教授。E-mail:yuhongfa@nuaa.edu.cn
作者简介:曾翔超(1977—),男,博士,讲师。主要从事新型结构材料的研究。E-mail:zxcgzz@sina.com
基金资助:
重庆市自然科学基金(cstc2019jcyj-msxmX0438)

Experimental Study on Diagonal-Tension Failure of Steel-Reinforced Basic Magnesium Sulfate Cement Concrete Beams

ZENG Xiangchao¹, YU Hongfa²

1. School of Civil Engineering, Yangtze Normal University, Chongqing 408100, China;
2. Department of Civil Engineering, Nanjing University of Aeronautic and Astronautic, Nanjing 200016, China

Received:2021-11-02 Revised:2022-02-07 Online:2022-04-15 Published:2022-04-27

摘要/Abstract

摘要： 碱式硫酸镁混凝土有具有快凝、早强、高抗拉强度、抗腐蚀等优点,但对其生成的梁的斜拉破坏尚缺乏研究。为了探索两种材料混凝土斜拉破坏梁力学性能差异,本文进行了碱式硫酸镁混凝土和普通混凝土梁斜拉破坏对比试验。试验结果表明,碱式硫酸镁混凝土梁在开裂荷载、极限承载力等方面具有一定优势,此外,两种材料梁的破坏模式有一定差异。对比同配筋同混凝土强度等级的普通混凝土梁,碱式硫酸镁混凝土梁开裂荷载和承载力提高20%以上,故对现行的普通混凝土梁承载力和开裂荷载计算公式进行了修正。本文对碱式硫酸镁混凝土在土木工程中的应用有一定的意义。

关键词: 碱式硫酸镁混凝土, 普通混凝土, 梁, 斜拉破坏, 开裂荷载, 承载力

Abstract: Basic magnesium sulfate cement concrete (BMSC) has many advantages, such as quick setting, early strength, high tensile strength, resistance to corrosion, and so on. However, the failure of diagonal-tension of BMSC beams has not been studied. In order to explore the differences in mechanical performance between BMSC beams and Portland cement concrete (PC) beams,a comparative test of diagonal-tension failure of the BMSC and PC beams were conducted. The experimental results show that the BMSC beams have advantages in the cracking load and the ultimate bearing capacity compared with the PC beams under diagonal-tension failure. There are some differences in the failure mode between the BMSC and PC beams. The cracking load and the bearing capacity of the BMSC beams are 20% higher than that of the PC beamswith the same reinforcement and the same concrete strength grade. So the calculation formulas for cracking load and bearing capacity of the PC beams have been modified. This paper has significance to the application of BMSC in civil engineering.

Key words: basic magnesium sulfate cement concrete, Portland cement concrete, beam, diagonal-tension failure, cracking load, bearing capacity

中图分类号:

TU378.2

曾翔超, 余红发. 钢筋碱式硫酸镁混凝土梁斜拉破坏的试验研究[J]. 硅酸盐通报, 2022, 41(4): 1285-1292.

ZENG Xiangchao, YU Hongfa. Experimental Study on Diagonal-Tension Failure of Steel-Reinforced Basic Magnesium Sulfate Cement Concrete Beams[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(4): 1285-1292.

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