木框架结构震动台实验研究
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摘要
为了研究木结构抗震性能、地震反应特征和破坏特征,将带消能节点的两层木框架结构模型进行模拟地震振动台实验。此模型为上下2层,层高均为1 m,平面尺寸为3m×3m,总高度为2m。实验结果及理论分析表明:模型结构的自振频率随着地震强度的增加而降低;模型结构的加速度、位移以及阻尼比随着地震强度的增加而逐渐增大;结构在受到较大强度的地震作用后进入塑性阶段;模型结构的阻尼比较弹性状态有大幅度的提高,耗能能力显著增强。
In order to study the seismic performance of wooden structures,seismic response and failure characteristics,we take the energy dissipation of nodes in the two-story wood frame structure model simulating seismic experiment.This model has upper and lower levels,the story height is 1 m,plane size is 3m × 3m and the total height is 2 m.Experiment results and theoretical analysis show that: the model structure of the natural vibration frequency decreases with the increasing seismic intensity;The acceleration,displacement and the damping ratio of the model structure increase gradually with the increasing seismic intensity;structure subject to greater strength earthquake the plastic stage role;the damp of the model structure greatly improved compared with under the elastic state,and energy dissipation capacity significantly enhanced.
In order to study the seismic performance of wooden structures,seismic response and failure characteristics,we take the energy dissipation of nodes in the two-story wood frame structure model simulating seismic experiment.This model has upper and lower levels,the story height is 1 m,plane size is 3m × 3m and the total height is 2 m.Experiment results and theoretical analysis show that: the model structure of the natural vibration frequency decreases with the increasing seismic intensity;The acceleration,displacement and the damping ratio of the model structure increase gradually with the increasing seismic intensity;structure subject to greater strength earthquake the plastic stage role;the damp of the model structure greatly improved compared with under the elastic state,and energy dissipation capacity significantly enhanced.
引文
[1]吕西林,程海江,卢文胜,倪春.两层轻型木结构足尺房屋模型模拟地震振动台实验研究[J].土木工程学报,2007,40(10).
[2]GB50005-2003木结构设计规范[S].北京:中国建筑工业出版社,2003.
[3]张敏政.地震模拟实验中相似律应用的若干问题[J].地震工程与工程振动,1997(2).
[4]李国强,李杰.工程结构动力检测理论与应用[M].北京:科学出版社,2002.
[5]GB50009-2012建筑荷载规范[S].北京:中国建筑工业出版社,2012.
[6]GB50011-2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2012.
[2]GB50005-2003木结构设计规范[S].北京:中国建筑工业出版社,2003.
[3]张敏政.地震模拟实验中相似律应用的若干问题[J].地震工程与工程振动,1997(2).
[4]李国强,李杰.工程结构动力检测理论与应用[M].北京:科学出版社,2002.
[5]GB50009-2012建筑荷载规范[S].北京:中国建筑工业出版社,2012.
[6]GB50011-2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2012.
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