摘要
砌体徐变导致结构内力重分布,甚至造成房屋倒塌。进行了2组共4个尺寸为290 mm×190 mm×600 mm的再生混凝土砖砌体试件分别在0.15fm和0.30fm的持续压应力作用下的徐变试验。为消除环境温度和湿度对测试数据的影响,在相同环境制作了1个相同尺寸的未受荷对比试件。研究了砖砌体竖向和横向徐变变化规律,得到了再生混凝土砖砌体徐变系数预测模型。试验结果表明,砖砌体徐变随应力增大呈线性增大,横向徐变略大于竖向徐变。
The creep of masonry structure causes the redistribution of internal force of the structure,and even causes the collapse of the building.Through the creep test of2groups of4recycled concrete brick masonry specimens of290mm x190mm x600mm respectively under sustained compressive stress of0.15fm and0.3fm In order to eliminate the influence of ambient temperature and humidity on the test data,1specimen with the same size and without load was fabricated in the same environment.The variation law of vertical and lateral creep of brick masonry was studied.The prediction model of creep coefficient of recycled concrete brick msonry was obtained.Test results show that creep of brick masonry increases linearly with the sustained compressive stress and the lateral creep is slightly larger than the vertical creep.
作者
梁建国
李诚鄀
胡地
LIANG Jianguo;LI Chengruo;HU Di(College of Civil Engineering,Changsha University of Science & Technology,Changsha 410114,China;Hunan Skyer Group Co.Ltd.,Changsha 410001,China)
出处
《四川建筑科学研究》
2018年第1期92-96,共5页
Sichuan Building Science
基金
国家自然科学基金(51678067)
关键词
砌体
再生混凝土
徐变
徐变系数
预测模型
masonry
recycled concrete
creep
creep coefficient
prediction model
