钢筋混凝土梁高温下抗剪性能的试验研究

杨志年; 齐建全; 段开达; 严建基; 孙兴威; 王兴国

doi:10.13204/j.gyjz201908060008

钢筋混凝土梁高温下抗剪性能的试验研究

doi: 10.13204/j.gyjz201908060008

杨志年^1,2,
齐建全^1,2,
段开达^1,2,
严建基^1,2,
孙兴威^1,2,
王兴国^1,2, ,

1. 华北理工大学建筑工程学院, 河北唐山 063210;
2. 河北省地震工程研究中心, 河北唐山 063210

基金项目:

国家自然科学基金项目（51608196）；河北省高等学校青年拔尖人才计划项目（BJ2018008）；河北省高等学校科学技术研究项目（ZD2020139）。

详细信息

作者简介:
杨志年,男,1983年出生,博士,副教授。

通讯作者:
王兴国,男,博士,教授,854828915@qq.com。

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- 文章访问数: 88
- HTML全文浏览量: 11
- PDF下载量: 4
- 被引次数: 0
出版历程
- 收稿日期: 2020-03-13

EXPERIMENT STUDY ON SHEAR PROPERTIES OF RC BEAMS UNDER HIGH TEMPERATURE

YANG Zhinian^1,2,
Qi Jianquan^1,2,
DUAN Kaida^1,2,
YAN Jianji^1,2,
SUN Xingwei^1,2,
WANG Xingguo^{1,2
, ,}

1. College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan 063210, China;
2. Earthquake Engineering Research Center of Hebei Province, Tangshan 063210, China

摘要

摘要: 通过对8根足尺钢筋混凝土梁进行恒载-升温条件下的火灾试验，分析不同边界条件、剪跨比及箍筋间距对梁高温下抗剪性能的影响，研究梁受火过程中截面混凝土的温度场、箍筋及纵筋的温度变化，梁的竖向位移、梁端水平位移及梁的最终裂缝开展形式，对比了不同参数影响下各梁的耐火极限。结果表明：剪跨比对钢筋混凝土梁高温下的抗剪性能影响显著，剪跨比越小，梁发生剪切破坏时的耐火极限越高，但破坏时的脆性特征更加明显；火灾下，随着箍筋间距的增加，梁的耐火极限降低；与常温下不同，高温下约束梁由于发生了内力重分布，其抗剪性能优于简支梁。
- 钢筋混凝土梁 /
- 高温下 /
- 箍筋间距 /
- 剪跨比 /
- 抗剪性能
Abstract: Eight full-scale reinforced concrete (RC) beams were tested for fire resistance. The effect of boundary conditions, shear span to effective depth ratios, stirrup spacings on shear properties of beams at high temperature was analyzed. The thermal fields within beams, variations of temperature of reinforcing bars, vertical and horizontal displacement and crack developing modes of beams were studied. The fire resistance of RC beams with different parameters was compared. The results showed that the shear span to effective depth ratios had significant influence on shear properties of beams at high temperature, with shear span to effective depth ratios decreased, the fire resistance of beams was improved, however, the failure characteristics of beams were obviously brittle. With stirrup spacings of beams increased, fire resistance of beams was decreased in fire. Different from at room temperature, fire resistance of simply supported beams was better than that of restrained beams, due to internal force redistribution of beams at high temperature.
- RC beam /
- under high temperature /
- stirrup spacing /
- shear span to effective depth ratio /
- shear property

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参考文献(13)

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