钢筋对结构安全的影响——汶川震害中钢筋的表现

THE EFFECT OF STEEL BAR ON THE SAFETY OF BUILDING STRUCTURE——THE PERFORMANCE OF THE STEEL BARS IN WENCHUAN EARTHQUAKE

通过对汶川地震中建筑结构震害现象的观察,分析了钢筋在结构承载受力中的作用。对比了钢筋的脆性、延性对结构破坏形态的影响,说明了钢筋变形性能对于结构安全的重要性。还通过对比圈梁-构造柱对砖砌墙体破坏形态的影响,分析了配筋对于维护墙体整体稳固性的作用。通过对比不同配箍对构件破坏的影响,探讨了箍筋约束对提高混凝土抗力的作用;同时介绍了改进的配箍方式。

Based on the observation of the damages to the building structures in Wenchuan Earthquake,the function of the steel bars on carring capacity of the structures is analysed.The effect of the brittleness and ductility of the steel bars on the failure modes of structure was compared,showing that the performance of the steel bars play an important part in the structural safety.According to the comparing of the influence of structural concrete columns and ring beams on the failure modes of masonry structure,the f...