EVALUATION OF RESIDUAL CAPACITY OF CONCRETE STRUCTURES DEMAGED BY SALT ATTACK
盐蚀破坏混凝土结构剩余承载力评估
基本信息
- 批准号:04650421
- 负责人:
- 金额:$ 1.34万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for General Scientific Research (C)
- 财政年份:1992
- 资助国家:日本
- 起止时间:1992 至 1993
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The research project consisted of three phases, such as (1) to examine the relationships among the cumulative electric current, the amount of corrosion of steel bar and the crack width on the surface of concrete using an erosion test, (2) to examine the deterioration of flexural capacity of beams by corrosion of steel bars under static loading, and (3) to examine the fatigue strength of beams with corrosion of steel bars.As for the first phase of project, the Faraday's law was acknowledged for the relationship between the cumulative electric current and the amout of corrosion of steel bar, and the crack width on the surface of concrete was observed linearly increased with the amout of corrosion. Stirrups did not influence the relationships so much.Unless the crack width on the surface of concrete exceeded 0.3mm, the mechanical behavior of RC beams under static loading was not reduced by corrosion of steel bars. Even if lapped splices were provided at the mid span, the properly arranged stirrups made the behavior of beams as they were. When the anchorage of steel bars is sufficiently proved, the reduction of capacity due to longitudinal cracks may be less than 30 %.The fatigue behavior of beams was greatly influenced by corrosion of steel bars. In particular, corroded steel bars are sensitive to stress concentration, and are easy to reduce the fatigue resistance. Under repeated loading, all beams with corrosion of steel bars failed by the rupture of steel bars irrespecitive to the amount of corrosion. The fatigue life, however, depended upon the amount of corrosion.
本研究分三个阶段进行,(1)通过腐蚀试验,研究累积电流、钢筋锈蚀量和混凝土表面裂缝宽度之间的关系;(2)在静态荷载作用下,研究钢筋锈蚀对梁抗弯承载力的影响;(3)钢筋锈蚀梁的疲劳强度试验,对于一期工程,累积电流与钢筋锈蚀量的关系符合法拉第定律,混凝土表面裂缝宽度随腐蚀量的增加而线性增加。钢筋锈蚀对钢筋混凝土梁静载性能的影响不大,除非混凝土表面裂缝宽度超过0.3mm,否则钢筋锈蚀不会降低钢筋混凝土梁静载性能。即使在跨中设置搭接接头,适当布置的箍筋也能使梁保持原样。当钢筋锚固充分时,纵向裂缝引起的承载力降低可小于30%,钢筋锈蚀对梁的疲劳性能影响很大。特别是锈蚀钢筋对应力集中敏感,容易降低疲劳抗力。在反复荷载作用下,钢筋锈蚀梁均发生钢筋断裂破坏,与锈蚀量无关。然而,疲劳寿命取决于腐蚀量。
项目成果
期刊论文数量(32)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
酒谷弘行: "鉄筋の腐食によるコンクリート部材のひび割れ性状" 土木学会第49回年次学術講演会講演概要集第5部. 532-533 (1994)
Hiroyuki Sakatani:“由于钢筋腐蚀引起的混凝土构件的开裂性能”第49届日本土木学会学术年会第5.532-533部分(1994年)
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- 影响因子:0
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片山修一: "鉄筋が腐食したRC粱供試体の耐荷性状" セメントコンクリート論文集(発表予定). 49. (1995)
Shuichi Katayama:“带有腐蚀钢筋的 RC 钢样本的承载性能”水泥和混凝土论文集(待发表)49。(1995 年)。
- DOI:
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- 影响因子:0
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Kawamura,A.: "Residual Capacity of Concrete Beams Damaged by Salt Attack" Proc.of CONSEC'95(発表予定). (1995)
Kawamura, A.:“盐侵蚀损坏的混凝土梁的残余能力”Proc. of CONSEC95(待提交)。
- DOI:
- 发表时间:
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- 影响因子:0
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石川和人: "鉄筋の腐食による付着劣化がはり供試体の耐荷性状に及ぼす影響" 土木学会第48回年次学術講演会講演概要集第5部. 242-243 (1993)
石川一人:《钢筋腐蚀引起的附着力劣化对梁试件承载性能的影响》日本土木工程学会第 48 届年度学术会议演讲摘要第 5 部分。242-243 (1993)
- DOI:
- 发表时间:
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- 影响因子:0
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- 通讯作者:
Kawamura, A.: "Residual Capacity of Concrete Beams Damaged by Salt Attack" Proc. of CONSEC'95, Sapporo. (to be published). (1995)
Kawamura, A.:“受盐侵蚀损坏的混凝土梁的剩余能力”Proc。
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MARUYAMA Kyuichi其他文献
若材齢コンクリートの超音波伝播速度と動弾性係数に対する骨材の影響
骨料对新拌混凝土超声传播速度和动弹性模量的影响
- DOI:
- 发表时间:
2008 - 期刊:
- 影响因子:0
- 作者:
SAWAMURA Shuji;MARUYAMA Kyuichi;NAGASHIMA Yuji - 通讯作者:
NAGASHIMA Yuji
MARUYAMA Kyuichi的其他文献
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{{ truncateString('MARUYAMA Kyuichi', 18)}}的其他基金
damage mechanism of bridge structures by huge tsunami and the proposal of countermeasures
特大海啸对桥梁结构的破坏机理及对策建议
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24246079 - 财政年份:2012
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$ 1.34万 - 项目类别:
Grant-in-Aid for Scientific Research (A)
Maintenance of concrete structures under severe environment in coastal zone of the Japan Sea
日本海沿岸恶劣环境下混凝土结构的维护
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16360225 - 财政年份:2004
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Development of Bond Test Method for Continuous Fiber Sheet
连续纤维片材粘合力测试方法的开发
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10650448 - 财政年份:1998
- 资助金额:
$ 1.34万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
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