土坯围护墙-木结构民居抗震加固振动台试验研究  

Shaking table test study on a seismic strengthening adobe-wall-shielding and timber-structure-bearing dwelling

作　　者：周铁钢[1] 朱瑞召 朱立新[2] 于文[2] 左德亮 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]中国建筑科学研究院,北京100013

出　　处：《西安建筑科技大学学报（自然科学版）》2016年第3期346-350,370,共6页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：国家科技支撑计划课题(2014BAL06B03);陕西省重点科技创新团队计划(2014KCT-31)

摘　　要：土坯围护墙-木结构传统民居在我国分布量大面广,实际震害表明该类型民居除木结构节点容易发生破坏外,围护墙体经常出现开裂、外闪,甚至倒塌现象.对此提出的加固措施包括:对木结构榫卯节点采用扁铁、薄钢片和角钢进行加固;在土坯墙体内外水平刻槽并设置配筋砂浆带,以增强土坯墙体水平抗剪能力,及与木结构之间可靠拉接.为验证以上措施的有效性,制作了单层两开间、1/2缩尺房屋加固模型,并进行了模拟地震振动台试验.试验结果表明:7度设防地震作用时墙体未见破坏,8度设防地震作用时墙体有轻微裂缝,8度罕遇地震作用时模型最大位移角达到1/61,墙体开裂较多,但由于约束较好,未有土坯剥落现象,并可以继续承载.试验过程中,加固后的木结构自始至终没有发生破坏,且与土坯围护墙体协同工作良好,总体上实现了"小震不坏、中震可修、大震不倒"的设防目标.The traditional dwelling of timber-structure-bearing and adobe-wall-shielding is widely distributed in our country. The practical earthquake damage shows that timber structure nodes are prone to damage and adobe wall to crack. Outside the wall, there are even collapse phenomenon. This paper puts forward the following reinforcement measures： reinforce the joints by using flat iron, thin plate and angle steel; notch horizontal groove both inside and outside the adobe wall and set the reinforced mortar in the groove to strengthen the adobe wall horizontal shear capacity and the wall is tied with the timber structure in a reliable way. In order to verify the effectiveness of the above measures, building reinforcement model of single-storey, two bays and 1/2 scale were made and a shaking table seismic simulated test was carried out. Shaking table test results show that： the walls are not damaged under the 7-intensity fortification earthquakes .Crack is slight under the Magnitude 8 fortification earthquake. The maximum displacement angle of the model is 1/61 and the wall cracks are more under the Magnitude 8 seldom occurred earthquake, but adobe don＇t appear peeling phenomenon and the wall can continue to load due to the constraint is better. During the test, the reinforced timber structure help didn＇t damage and worked well together with the wall. The reinforcement model can achieve the design objective of operational under small earthquakes, repairable damage under medium earthquakes, and collapse prevention under large earthquakes.

关 键 词：传统民居 土坯围护墙 木结构 抗震加固 振动台试验 

分 类 号：TU366.2[建筑科学—结构工程] TU317.1