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增大截面加固受弯构件的正截面承载力计算方法 被引量:8

Calculation Method of Bearing Capacity on Cross-section of Bending Member Strengthened with Enlarged Section
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摘要 为了简便地进行增大截面加固桥梁受弯构件的正截面承载力计算,对比分析现行有关设计规范的规定,结合专家教授在运用这些规范时提出的修改意见,分析研究增大截面加固受弯构件的5种不同破坏形态,认为不可能出现B级适筋梁破坏形态,即旧受拉钢筋屈服而新增受拉钢筋未屈服的破坏状态。根据破坏形态研究的结论得到了增大截面加固梁的正截面承载力计算公式,该计算公式可适用于同时在构件截面受拉区及受压区增厚混凝土的通用情况,并经过工程实例进行验证对比。该计算方法简便并相对安全,已被即将颁布的《城市桥梁结构加固技术规程》采用。 In order to calculate the bearing capacity on cross-section of bridge bending members strengthened with enlarged sectioned expediently, by comparative analysing the regulations of the relevant design specifications, adopting the modification advice for application of the specifications propounded by some experts, 5 destruct forms of bending members strengthened with enlarged section are analysed. It is believed that the occurrence of " destruct form of B-class suitable reinforcement beam" is impossible, i.e. , the destruct form that new tension steels would not yield and old tension steels have yielded. According to the conclusion of the study on damage form, the calculation formula for bearing capacity on cross-section of beams strengthened with enlarged section is obtained. The calculation formula is suitable for increasing section on both the tension zone and the compressive zone, and is tested with the engineering example. The calculation method is simple and relative safe, it is adopted in Technical Specifications for Strengthening Urban Bridges that will enact soon.
出处 《公路交通科技》 CAS CSCD 北大核心 2015年第6期81-88,共8页 Journal of Highway and Transportation Research and Development
关键词 桥梁工程 桥梁加固 计算方法 受弯构件 正截面承载力 增大截面 bridge engineering bridge strengthening calculation method bending member bearingcapacity on cross-section enlarged section
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