木板夹芯房屋抗震性能试验研究  

Experimental study on seismic performance of wooden sandwich farmhouse

作　　者：张再昱 周铁钢[1] ZHANG Zaiyu;ZHOU Tiegang(School of Civil Engineering,Xi’an University of Architecture&Technology,Xi’an 710055,China)

机构地区：[1]西安建筑科技大学土木工程学院,西安710055

出　　处：《建筑结构》2021年第24期103-108,共6页Building Structure

基　　金：国家科技支撑计划项目(2014BAL06B03);陕西省重点科技创新团队计划项目(2014KCT-31);乡村既有农宅安全宜居性能改造关键技术研究与示范项目(2020ZDLNY06-03)。

摘　　要：新疆是我国地震频发地区,在历次地震中当地的传统民居会遭受不同程度的损坏。为了解当地木板夹芯房屋的抗震性能,设计了一个1/4缩尺比例的单层木板夹芯房屋模型振动台试验,研究模型结构在各个工况作用下的结构动力特性、加速度和位移反应等。试验结果表明:在8度多遇地震(加速度峰值110gal)时,模型门窗洞口薄弱位置开裂,自振频率和刚度明显下降;在9度罕遇地震(加速度峰值620gal)时,模型上下两道木圈梁出现了明显的开裂,但木柱与墙体的横向木板连接稳固,结构整体性完好,此时模型的位移角为1/23。由此可知,木板夹芯房屋满足新疆大部分地区"大震不倒"的8度抗震设防要求。Xinjiang is a region with frequent earthquake disasters in China.In each earthquake,the local traditional houses suffered varying degrees of damage.In order to understand the seismic performance of local wooded sandwich house,a shaking table test of a one-story wooded sandwich house model with 1/4 scale was designed to study the dynamic characteristics,acceleration and displacement response of the model structure under various working conditions.The experimental results show that the crack occurs at the weak position of the model door and window,and the natural vibration frequency and stiffness decrease obviously when the earthquake is 8 degrees frequent earthquake(peak acceleration of 110 gal).In the case of the 9 degree rare earthquake(peak acceleration of 620 gal),the upper and lower wooden ring beams of the model appear obvious cracks,but the transverse wooden columns are firmly connected to the wooden board of the wall,and the integrity of the structure is intact.At this time,the displacement angle of the model was 1/23.It can be seen that the wooded sandwich houses meet the requirement of 8 degrees seismic fortification of ‘not collapse under the rare earthquake’ in most areas of Xinjiang.

关 键 词：振动台试验 木板夹芯房屋 自振频率 抗震性能 加速度反应 

分 类 号：TU398.7[建筑科学—结构工程]