李升才，李涛

（华侨大学土木工程学院，厦门 361021）

 

［摘要］通过节能砌块隐形密框结构3层楼房1/2模型振动台试验，用白噪声测定了各工况下结构的动力特性，并分析了其变化规律。结果表明：结构的刚度较大，在振动台输入峰值加速度达到0.82g时，模型结构基本上仍处于弹性阶段，结构自振频率没有急剧下降，结构的耗能性能较好，初始阻尼比较高。随着输入峰值加速度的上升，内部裂缝发展，结构的自振频率逐渐下降，周期逐渐增大，阻尼有所增长。

［关键词］节能砌块隐形密框结构；振动台试验；白噪声；动力特性

中图分类号：TU317+.1，TU398+.9文献标识码：A文章编号：1002-848X(2012)09-0131-03

 

Li Shengcai, Li Tao

( School of Civil Engineering, Huaqiao University, Xiamen 361021, China)

 

Abstract: By means of shaking table test of 1/2 scaled three-storey building model of energy saving block & invisible multi-ribbed frame structure, dynamic characteristics of the structure were measured by white-noise excitation under various operation conditions and its variation law was analyzed. The results show that structural stiffness is higher, and the structure is still in an elastic stage when the seismic excitations peak acceleration of shaking table reached 0.82g. Natural frequency does not decrease sharply, and the structure has better energy dissipation ability and higher initial damping ratio. With the rise of the seismic excitations peak acceleration, inner crack developes, natural frequency gradually decreases, natural vibration period gradually increases, and structure damping gradually increases.

Keywords: energy-saving block & invisible multi-ribbed frame structure; shaking table test; white-noise; dynamic characteristic

*国家自然科学基金资助项目（50948036），福建省自然科学基金计划项目（E0810022），福建省科技计划重点项目（2012H0028）。

作者简介：李升才，博士，教授，Email: lsc50605@hqu.edu.cn。

 

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