曹资  薛素铎  刘景园
    （北京工业大学土木系  100022）

[提要]  本文充分考虑了悬索结构大挠度变形几何非线性反应特征，在动力反应有限元理论分析中完善了索单元刚度和拟荷载项表达式，优化了计算方法。对与动力分析直接相关的索网阻尼特性及其对地震反应影响做了深入研究，并给出了常见索网屋盖结构地震反应及主要参数影响规律。在以上研究基础上，对悬索结构地震反应分析与设计提出几点新建议。
[关键词]  悬索结构 几何非线性 地震反应  阻尼特性

The finite element analysis method of dynamic response for cable suspended structures was further improved in this paper. The geometrically nonlinear characteristic is fully taken into account in the derivation of expressions of the stiffness matrix for a cable element and the pseudo loading vector. The damping behavior and the influense of parameters on seismic response of cable networkes were made a thorough investigation and study.Some useful conclusions for aseismlc analysis were given.
Keywords: suspended cable  structure; geometrical  nonlinearity; seismic  response; damping charac-
teristics