预应力钢筋混凝土梁挠度计算研究  

Study on Deflection Calculation of Prestressed Reinforced Concrete Beams

作　　者：张耀庭[1] 孙尧州[1] 张正哲[2] 

机构地区：[1]华中科技大学土木工程与力学学院,湖北武汉430074 [2]辽宁省水利水电科学研究院,辽宁沈阳110033

出　　处：《华中科技大学学报（城市科学版）》2006年第4期27-30,共4页Journal of Huazhong University of Science and Technology

基　　金：华中科技大学博士后基金项目

摘　　要：对预应力钢筋混凝土梁挠度的计算,国内外提出了很多计算方法和公式,但这些公式的适用性和准确性值得进一步探讨.对5根预应力钢筋混凝土梁进行静力试验,并将试验结果与我国GB 50010-2002《混凝土结构设计规范》和美国AC I318-99规范中公式的计算结果进行了对比分析.结果表明,GB 50010-2002规范公式的计算结果与梁未开裂时的试验结果比较吻合,AC I318-99的计算公式对开裂后的计算相对准确,但两种规范对处于开裂荷载附近的计算均不是很理想.Many methods and formulas on the deflection calculation of prestressed reinforced concrete beams have been proposed at home and abroad, but the accuracy and application of these formulas is an issue which is necessary for further study. This paper carried out static experiments of five prestressed reinforced concrete beams, then the comparative analysis of the test results to the calculation results of formulas specified in both the Chinese Concrete Design Code （GBS0010-20） and ACI318-99 were put forward. It is found that, the calculation results from formulas specified in GB50010-20 agree with the test results on untracked prestressed concrete beams to great extent, and formulas specified in ACI318-99 are more suitable for calculation of those postcracked prestressed concrete beams, but formulas in both codes are not ideal for the calculation when loads near the crack ones.

关 键 词：预应力混凝土 挠度 短期刚度 规范 

分 类 号：TU317.3[建筑科学—结构工程]