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我们在设计工作中经常遇到的单层厂房排架,多层框架以及烟囱、水塔等构筑物其自振周期T常在0.5秒以上。诚如原文指出的对于这类低频结构其延性如何,对于在地震力作用下结构物的安全影响最大。故结构延性的研究在目前就有其现实意义。原文根据国外文献介绍了结构延性的基本概念,结合我国现行规范导出了弯曲和偏压截面延伸系数的计算方法,这一工作值得重视。我们在学习原文之后觉得有以下几个问题可以讨论: 1.对于弯曲延伸系数计算中K_y值原文未考虑受压区配筋的影响,有时这一因素对
The vibration period T of single-storey factory buildings, multi-story frames, chimneys, and water towers that we often encounter in design work often exceeds 0.5 seconds. As the original text points out, how is the ductility of this type of low-frequency structure? It has the greatest impact on the safety of structures under the action of seismic forces. Therefore, the study of structural ductility has its practical significance at present. The original text introduces the basic concept of structural ductility according to foreign literature, and it also derives the calculation method of the extension coefficient of bending and bias cross section combined with the current Chinese norms. This work deserves attention. After studying the original text, we felt that the following problems could be discussed: 1. The original K_y value in the calculation of the bending elongation factor did not consider the influence of reinforcement in the compression zone, and sometimes this factor was