前言久已认为,在强烈地震作用下,应预期钢筋混凝士结构具有非弹性效应。现行的美国建筑规范和设计规程承认这一要求,并载有保证构件在重复的非弹性反复荷载下具有延性性状的条款。在过去的讨论中仅简短地提到的构件 Foreword has long believed that under strong earthquakes, it should be expected that the structure of reinforced concrete has inelastic effects. The current U.S. building codes and design rules recognize this requirement and contain provisions that ensure that the component has a ductile character under repeated non-elastic repeated loads. In the past discussion only briefly mentioned components