东南大学学报（自然科学版）Issue(4)：817-821,5.DOI:10.3969/j.issn.1001-0505.2014.04.024
民国时期混凝土建筑中钢筋的物理力学性能
Physical and mechanical performances of reinforcements in reinforced concrete buildings built during Republic of China
摘要
Abstract
The surface shape characteristics of the reinforcements in reinforced concrete buildings built during the period of the Republic of China are analyzed by the survey method.The tensile properties are also tested by universal testing machine.The chemical compositions are analyzed by combining the spark direct reading spectrograph method with the wet chemical analysis method.The metallographic microstructures are tested by metalloscope.The microstructure analysis is carried out by scanning electron microscope ( SEM) .The test results show that the heights of the transverse ribs of the reinforcements with square sections can meet the current requirements while the spacings be-tween the adjacent transverse ribs, the sums of the gaps between the transverse ribs and the relative rib areas cannot.The reinforcements with square section and those with circular section are low-car-bon hot-rolled steel.The average yield strengths of these two kinds of reinforcements are 278.60 and 350.65 MPa, respectively.The average ultimate tensile strengths are 375.86 and 464.37 MPa, re-spectively.The average ratios of the tensile strength to the yield strength are 1.35 and 1.32, respec-tively.The average elongations are 32.25%and 25.08%, respectively.关键词
民国混凝土建筑/钢筋/物理力学性能/应力-应变曲线/金相组织Key words
reinforced concrete buildings built during Republic of China/reinforcement/physical and mechanical performances/stress-strain curve/metallographic microstructure分类
建筑与水利引用本文复制引用
淳庆,王建国,冯世虎,吕伟..民国时期混凝土建筑中钢筋的物理力学性能[J].东南大学学报（自然科学版）,2014,(4):817-821,5.基金项目
国家自然科学基金重点资助项目（51138002）、中央高校基本科研业务费专项资金资助项目（2242013R30001）． （）
