高强钢筋混凝土梁短期变形计算方法研究  

Calculation Methods of Short-term Deformation of Concrete Beams with High Strength Steel Bars

作　　者：周建民[1] 陈硕[1] 王晓锋[2] 赵勇[1] 

机构地区：[1]同济大学土木工程学院,上海200092 [2]中国建筑科学研究院,北京100013

出　　处：《同济大学学报（自然科学版）》2013年第4期503-509,共7页Journal of Tongji University:Natural Science

基　　金："十一五"国家科技支撑计划(2012BAJ06B01-01)

摘　　要：为推广和应用高强钢筋,对配置高强钢筋的混凝土梁和预应力钢筋混凝土梁进行了一系列单调加载试验.试验结果表明,新规范GB 50010—2010对配置高强钢筋的混凝土梁在短期的刚度计算上是适用的;影响混凝土梁变形性能的主要因素为初始刚度、配筋率与荷载.在此基础上,进一步推导出不仅适用于混凝土梁,也适用于预应力混凝土梁短期变形计算的简化公式.与国内外规范对比结果和试验结果表明,文中建议公式计算精度高,概念清晰,简单实用.Tests of reinforced concrete （RC） and prestressed reinforced concrete （PRC） beams with 500MPa steel bars were carried out in Tongji University in order to promote the application of high strength steel bar. The results verifies the equations from new code GB 50010-2010 on calculating short term flexural stiffness of concrete beams with high strength steel bars. The deformational response of beams is mainly influenced by three parameters including initial elastic flexural stiffness, longitudinal reinforcement ratio and load level. Based on the tests, a simplified formula is proposed on the basis of the theoreticai analyses of the prediction of the short term deformation of concrete beams with high strength steel bars. A comparison with the calculations of different codes at home and abroad exhibits that the proposed formula is precise and practical for both RC and PRC beams.

关 键 词：混凝土梁 高强钢筋 短期变形 计算方法 

分 类 号：TU378[建筑科学—结构工程]