摘要
空斗墙承重民居广泛分布在我国南方农村地区,由于其抗震性能较差,遭遇地震作用时极易发生破坏甚至失稳倒塌。基于实地调查与分析,针对此类民居,考虑风貌保护提出了采用高延性纤维增强水泥基复合材料（ECC）对空斗墙体进行加固的方法。该方法在房屋墙体内侧采用ECC面层加固、外侧采用ECC条带加固。设计并制作了单层足尺房屋模型,对其进行振动台试验研究,分析模型结构的动力特性、加速度放大系数与位移反应以及损伤情况,验证ECC加固空斗墙房屋的有效性。试验结果表明：ECC加固技术能够有效延缓墙体裂缝开展,减小空斗墙承重结构的刚度退化,显著提高了空斗墙体的抗震承载能力与强震作用下房屋的抗倒塌性能。
Various cavity-wall houses are built in the south rural areas of China. Because of their poor seismic performance, this kind of buildings are likely to be damaged seriously and even collapse under earthquake actions. For the sake of protection of the style and feature of the cavity-wall buildings, a strengthening method using engineered eementitious composite （ECC） was proposed. With the proposed method, the wall of the house was retrofitted by ECC splints internally and ECC stripes externally. To verify the effectiveness of the strengthening technique, a shaking table test of a full-scale cavity-wall house model was carried out, and the dynamic properties, acceleration magnification factor, displacement response and damage condition were analyzed. The test results show that, the ECC strengthening technique can effectively delay the crack development in the wall, reduce the stiffness degradation of the bearing structure, improve the seismic carrying capacity of the cavity-wall, and thus enhance its anti-collapse performance under rare earthquakes.
作者
周铁钢
田鹏
邓明科
赵祥
张浩
梁增飞
ZHOU Tiegang;TIAN Peng;DENG Mingke;ZHAO Xiang;ZHANG Hao;LIANG Zengfei(School of Civil Engineering,Xi＇an University of Architecture and Technology,Xi＇an 710055,China)
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2018年第12期147-152,共6页
Journal of Building Structures
基金
国家科技支撑计划(2014BAL06B03)
陕西省重点科技创新团队计划(2014KCT-31)
