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| 预应力FRP片材局部加固RC梁跨中挠度计算 | |
| 引用本文： | 王兴国,郭大州,张春生,周朝阳.预应力FRP片材局部加固RC梁跨中挠度计算[J].桥梁建设,2010(2). |
| 作者姓名： | 王兴国 郭大州 张春生 周朝阳 |
| 作者单位： | 1. 河南理工大学土木工程学院,河南,焦作,454003 2. 河南理工大学高职学院,河南焦作,454003 3. 中南大学土木建筑学院,湖南,长沙,410075 |
| 基金项目： | 河南省重点科技计划项目(082102240009); 河南省教育厅自然科研项目(2008A560004); 河南理工大学校博士基金(648258) |
| 摘 要： | 带永久性锚固措施的预应力纤维增强聚合物(简称FRP)片材加固混凝土梁桥时,采用局部加固方法;确定预应力FRP片材加固梁开裂后的有效惯性矩,将预应力视为外力,分析加固梁在不同加载情况下开裂至屈服阶段的FRP片材偏心距的变化,推导出预应力片材局部加固混凝土梁的跨中反拱和加载过程中的跨中挠度计算公式。采用文中推导的公式对预应力FRP薄板加固大比例混凝土梁在加载过程中的跨中挠度进行计算,预应力片材局部加固零载梁及局部加固负载梁的实测值与计算值吻合均较好。 |
| 关 键 词： | 混凝土梁桥 FRP 局部加固 二次效应 挠度 计算方法 |
Calculation of Midspan Deflection of RC Beams Locally Strengthened with Prestressed FRP Laminates |
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| WANG Xing-guo,GUO Da-zhou,ZHANG Chun-sheng,ZHOU Chao-yang.Calculation of Midspan Deflection of RC Beams Locally Strengthened with Prestressed FRP Laminates[J].Bridge Construction,2010(2). | |
| Authors: | WANG Xing-guo GUO Da-zhou ZHANG Chun-sheng ZHOU Chao-yang |
| Abstract: | The local strengthening method was used for a reinforced concrete(RC) beam bridge when it was strengthened with permanently end-anchored and prestressed fiber reinforced polymer(FRP) laminates.By determining the effective inertia moment of the beams of the bridge strengthened with the laminates after cracking occurs and taking the prestressing force as the external load,the changes of eccentricity of the FRP laminates of the strengthened beams under different loading from the stages of cracking to yielding ... |
| Keywords: | concrete beam bridge FRP local strengthening second-order effect deflection calculation method |
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