苏州混凝土水泥制品研究院有限公司

头部文案

发布时间:2020-01-06 00:00:00
全国建材科技期刊
全国中文核心期刊
中国科技论文统计源期刊
万方数据-数字化期刊群入网期刊
中国学术期刊(光盘版)全文收录期刊
华东地区优秀科技期刊
江苏省期刊方阵“双效期刊”
中国期刊网全文收录期刊
中国科技期刊数据库全文收录期刊
局部区段锈蚀的钢筋混凝土梁抗剪承载力试验研究
Experimental Study on Shear Capacity of Reinforced Concrete Beam with Partial Section Corrosion
2010年第6期
钢筋混凝土梁;抗剪承载力;锈蚀;完全无粘结;局部区段
Reinforced concrete beam; Shear capacity; Corrosion; Completely unbonded; Partial section
2010年第6期
1000-4637(2010)06-60-06
国家自然科学基金项目(50508020)
李 冰1,高向华1,王小惠1,史荣飞2
1.上海交通大学土木工程系,200240; 2.常州平水置业有限公司,213003

李 冰1,高向华1,王小惠1,史荣飞2

浏览量:
1000
摘 要:根据实际工程构件中钢筋锈蚀的不均匀性,设计了14根钢筋混凝土梁,并进行了试验梁在两对称集中荷载作用下的抗剪性能试验。通过对不同特征试验梁的裂缝分布、破坏模式和极限承载力的对比分析,研究了一侧剪跨内不同长度局部区段内不同的锈蚀特征对梁受力性能和承载力的影响。结果表明,一侧剪跨局部区段无粘结梁、锈蚀梁的力学性能与正常梁有很大的区别:因局部区段内的完全无粘结,局部区段无粘结梁在无粘结一侧的剪跨区内无斜裂缝,梁可能发生粘结完好一侧的剪切破坏,也可能发生弯曲破坏。对局部区段锈蚀梁,虽然所有的试件均因剪跨内的锈蚀区段而破坏,但随着锈蚀区段长度的增长和其内钢筋锈蚀率的增加,梁呈现出较脆的破坏模式和较低的极限承载力。 Abstract: According to inhomogeneity of component steel corrosion in practical engineering, 14 RC beams are designed, and under the roles of symmetrical concentrated loading, shear properties tests of testing beams are conducted. Through crack distinctions, contrastive analysis of damage modes and limited capacity of different characteristic testing beams, the influences of different corrosion characteristic of the partial section with different lengths in one side shear span on beams mechanical properties and bearing capacity are researched. The results indicate that mechanical properties beteween unbonded or corroded beams of the partial section in one side shear span and normal beams have a lot of differences: because of completely unbonded in partial section, unbonded beams of the partial section in unbonded side shear span have no diagonal cracks, therefore, beams may happen shear damage in good bonded side or will happen bending damage. For the corroded beams in partial section, all samples are destroyed because of corrosion section in shear span, however, by the length of corrosion section increasing and steel corrosion rate inside increasing, fragile damage modes and low limited capacity of beams are presented.
英文名 : Experimental Study on Shear Capacity of Reinforced Concrete Beam with Partial Section Corrosion
刊期 : 2010年第6期
关键词 : 钢筋混凝土梁;抗剪承载力;锈蚀;完全无粘结;局部区段
Key words : Reinforced concrete beam; Shear capacity; Corrosion; Completely unbonded; Partial section
刊期 : 2010年第6期
DOI :
文章编号 : 1000-4637(2010)06-60-06
基金项目 : 国家自然科学基金项目(50508020)
作者 : 李 冰1,高向华1,王小惠1,史荣飞2
单位 : 1.上海交通大学土木工程系,200240; 2.常州平水置业有限公司,213003

李 冰1,高向华1,王小惠1,史荣飞2

摘要
参数
结论
参考文献
引用本文

摘   要:根据实际工程构件中钢筋锈蚀的不均匀性,设计了14根钢筋混凝土梁,并进行了试验梁在两对称集中荷载作用下的抗剪性能试验。通过对不同特征试验梁的裂缝分布、破坏模式和极限承载力的对比分析,研究了一侧剪跨内不同长度局部区段内不同的锈蚀特征对梁受力性能和承载力的影响。结果表明,一侧剪跨局部区段无粘结梁、锈蚀梁的力学性能与正常梁有很大的区别:因局部区段内的完全无粘结,局部区段无粘结梁在无粘结一侧的剪跨区内无斜裂缝,梁可能发生粘结完好一侧的剪切破坏,也可能发生弯曲破坏。对局部区段锈蚀梁,虽然所有的试件均因剪跨内的锈蚀区段而破坏,但随着锈蚀区段长度的增长和其内钢筋锈蚀率的增加,梁呈现出较脆的破坏模式和较低的极限承载力。

Abstract: According to inhomogeneity of component steel corrosion in practical engineering, 14 RC beams are designed, and under the roles of symmetrical concentrated loading, shear properties tests of testing beams are conducted. Through crack distinctions, contrastive analysis of damage modes and limited capacity of different characteristic testing beams, the influences of different corrosion characteristic of the partial section with different lengths in one side shear span on beams mechanical properties and bearing capacity are researched. The results indicate that mechanical properties beteween unbonded or corroded beams of the partial section in one side shear span and normal beams have a lot of differences: because of completely unbonded in partial section, unbonded beams of the partial section in unbonded side shear span have no diagonal cracks, therefore, beams may happen shear damage in good bonded side or will happen bending damage. For the corroded beams in partial section, all samples are destroyed because of corrosion section in shear span, however, by the length of corrosion section increasing and steel corrosion rate inside increasing, fragile damage modes and low limited capacity of beams are presented.

关键词:
钢筋混凝土梁;抗剪承载力;锈蚀;完全无粘结;局部区段
扫二维码用手机看
未找到相应参数组,请于后台属性模板中添加
(1)局部区段无粘结梁的力学性能与正常梁有很大的区别,局部区段无粘结梁在无粘结一侧的剪跨区内无斜裂缝;且由于局部区段内的完全无粘结,局部区段无粘结梁的破坏模式也发生较大的变化。与粘结完好梁相比,当梁整个剪跨内均无粘结时,两种剪跨比下相应的局部区段无粘结梁均具有最高的相对承载比。
(2)对局部区段锈蚀梁,虽然所有的试件均因剪跨内的锈蚀区段而发生沿斜截面的破坏,但随着锈蚀区段长度的增加和其内钢筋锈蚀率的提高,梁呈现出较脆的破坏模式和较低的极限承载力。与粘结完好梁相比,当梁整个剪跨内均锈蚀时,两种剪跨比下相应的局部区段锈蚀梁均具有最低的相对承载比。
(3)当梁一侧剪跨内的锈蚀区段内有较高的钢筋锈蚀率时,如果纵筋或与之接触的箍筋被锈蚀严重破损甚至锈断,那么在很低荷载作用下,梁就可能发生脆性的断裂破坏。这对与生命线相关的建筑物来说是非常危险的。
(4)在对锈蚀钢筋混凝土梁的力学特征和承载能力的试验研究中,忽视锈蚀尤其是坑蚀对纵向受力钢筋和箍筋的影响而仅考虑因锈蚀引起的钢筋与混凝土间的粘结退化,用局部区段无粘结梁来研究锈蚀钢筋混凝土梁的力学特征和承载能力,可能会导致对局部区段锈蚀钢筋混凝土梁承载能力的评估过高,从而忽视因局部区段内纵向钢筋的较大坑蚀和箍筋的锈断引起的构件发生突然脆性破坏的危害。
[1] Cairns J. and Zhao Z. Behaviour of concrete beams with exposed reinforcement. Proceeding Institution of Civil Engineers: Structures & Building 1993, 99(2): 141-154.
[2] Cairns J. Strength in shear of concrete beams with exposed reinforcement. Proceeding Institution of Civil Engineers: Structures & Building 1995, 110(2): 176-185.
[3] Raoof M. and Lin Z. Structural characteristics of RC beams with exposed main steel. Proceeding Institution of Civil Engineers: Structures & Building 1997, 122(1): 35-51.
[4] Kim W. and White R.N. Shear-critical cracking in slender reinforced concrete beams. ACI Structural Journal 1999, 96(5), 757-765.
[5] 王庆霖,池永亮,牛荻涛. 锈后无粘结钢筋混凝土梁的模拟试验与分析. 建筑结构2001,31 (4): 51-53.
[6] Jeppsson J. and Thelandersson S. Behavior of reinforced concrete beams with loss of bond at longitudinal reinforcement. Journal of Structural Engineering 2003, 129(10): 1376-1383.
[7] 余璠璟. 锈蚀钢筋混凝土梁斜截面性能试验研究和分析(硕士学位论文). 南京,河海大学,2005.4.
[8]李春平. 受拉钢筋暴露的混凝土梁正截面承载力试验研究 (硕士学位论文). 南京,南京航空航天大学,2007.1.
[9] EI Maaddawy T, Soudki K, Topper T (2005) Analytical model to predict nonlinear flexural behavior of corroded reinforced concrete beams. ACI Struct J 102(4): 550-59.
[10] Choi K-K, Park H-G(2007) Unified Shear Strength Model for Reinforced Concrete Beams—Part II: Verification and Simplified Method. ACI Struct J 104(2):153-61.

相关文件

暂时没有内容信息显示
请先在网站后台添加数据记录。

关注《混凝土与水泥制品》

总访问量 468,401   网站统计

官方微信公众号关闭
苏州混凝土水泥制品研究院有限公司

关于我们    |    联系我们    |    订购杂志    |    回到顶部

版权所有:中国混凝土与水泥制品网  苏ICP备10086386号   网站建设:中企动力 苏州

版权所有:中国混凝土与水泥制品网

苏ICP备10086386号

网站建设:中企动力 苏州