论文部分内容阅读
本文讨论多自由度刚构在被迫振动下的计算问题。以往计算刚构的振动问题时,常假定横梁远较直柱刚劲,因而每层剪力只和上下节间的相对位移有关。本文指出这个假定并非必需,而可在考虑刚构整体连续性的基础上进行计算,并给出准确计算自然振週的公式。以后主要陈述多自由度刚构在折线加速度作用下之振动,包括阻尼影响在内,本文所述方法可用来计算刚构的地震应力,因地震加速度图谱常可近似地用折线来表示。
This paper discusses the computational problem of multi-degree-of-freedom rigid frame under forced vibration. In the past, when calculating the vibration problems of rigid structures, it was often assumed that the beams were far more rigid than the straight columns, so that the shear force of each layer was only related to the relative displacement between the upper and lower nodes. This article points out that this assumption is not necessary, but can be calculated on the basis of considering the overall continuity of the rigid frame, and the formula for accurately calculating the natural vibration cycle is given. After that, it mainly states the vibration of the multi-degree-of-freedom rigid frame under the action of the polygonal line acceleration, including the damping effect. The method described in this paper can be used to calculate the seismic stress of the rigid frame structure. The earthquake acceleration spectrum can often be approximated by a polygonal line.