单层厂房扭转耦联振动分析方法的研究

Study on Coupled Torsional Aseismic Analysis Approaches for Unsymmetrical Single-Storey industrial Buildings

本文在理论上对两种分析单层厂房扭转耦联振动的不同方法进行了论证与对比分析。证明两法在各自假定屋盖为剪切杆及剪切板的不同基础上推导均是正确的，虽然其动力方程形式各异，动力自由度数亦不相同，但两法实质相同，其动力方程式可以相互沟通，两法的差别仅在于将屋盖分别假定为剪切杆和剪切权产生了剪切项的差异。本文为建筑抗震设计规范（ＧＢＪ１１—８９）今后的修订采用正确合理的计算方法提供了理论依据。

Verification and comparison of the analysis of two different current calculation methods under dispute for coupled torsional analysis of single-storey industrial buildings subjected to earthquake actions have been investigated theoretically in this paper.It is concluded that both methods are correct in their respective derivation and final expression based on their own assumptions. The authors prove that the two methods are substantially the same except that there is a difference in the shear deformation term of their fundamental vibration equations in which one method deals with the roof structure as a shear beam while the other as a shear slab.Since the dispute about the two methods has existed for a long time, this paper may not only clarify the confusion in seismic design and research circle, but,also provide a theoretical base for the future revision of this problem in seismic design code.