王振宇  刘晶波    （清华大学土木工程系  北京100084）

  彭敏文       （广播电影电视总局设计院  北京 100866）

[提要]  探讨具有水平连接刚度突变特征的钢筋混凝土结构的一般力学特点与动力反应分析方法。以莆田市广播电视中心工程结构为例，揭示结构因水平连接刚度突变而导致的复杂振型、地震作用下局部动应力集中等特点。通过有限元法模拟了水平连接刚度突变处不同的连接方案对结构动力特性与地震反应的影响。
[关键词]  混凝土结构  水平连接刚度突变  动力特性  地震反应  动应力集中

General mechanic differences and methods of dynamic response analysis of RC structure characterized by abrupt change in horizontal connection stiffness are discussed. For structure of Putian Center of Radio, Film and TV, complicated modals and stress concentration resulted from abrupt change in horizontal connection stiffness are revealed by FEM.Different connective plans located in place of abrupt change in horizontal connection stiffness have effects on structural dynamic properties and seismic response.
Keywords: abrupt change; horizontal connection stiffness; dynamic properties; seismic response; stress concentration