钢筋碱式硫酸镁水泥混凝土柱受压性能试验研究  

Experimental study on compression behavior of reinforced basic magnesium sulfate cement concrete column

作　　者：曾翔超[1] 余红发[1] 吴成友[2] ZENG Xiangehao;YU Hongfa;WU Chengyou(Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;Department of Civil Engineering, Qinghai University, Xining 810016, China)

机构地区：[1]南京航空航天大学土木工程系,江苏南京210016 [2]青海大学土木工程学院,青海西宁810016

出　　处：《建筑结构学报》2018年第2期88-96,共9页Journal of Building Structures

基　　金：国家自然科学基金项目(21276264);江苏省普通高校研究生科研创新计划项目(PAPD)

摘　　要：与硅酸盐水泥混凝土相比,碱式硫酸镁水泥混凝土具有快凝、早强、高强、抗水、抗腐蚀等优点,为了探索碱式硫酸镁水泥混凝土柱与普通混凝土柱在基本力学性能上的差异,进行了16个试件的受压静载试验。试验结果发现,碱式硫酸镁水泥混凝土大偏心受压柱的开裂弯矩、承载力比普通混凝土柱高约20%,碱式硫酸镁水泥混凝土小偏心受压柱性能和普通混凝土相当。偏心距较大时,碱式硫酸镁水泥混凝土柱的承载能力也随混凝土强度的提高小幅度增大;现行混凝土规范GB 50010—2010中普通混凝土偏心受压柱承载力计算公式不适用于碱式硫酸镁水泥混凝土偏心受压柱,需要修正。Basic magnesium sulfate cement（BMS） has many advantages such as fast-setting,early strength,high strength,resistance to water and corrosion resistance,and so on. In order to explore the difference in performance between BMS concrete and conventional RC large eccentric column,the static experiments of sixteen BMS concrete columns were conducted. The results show that large eccentricity compression column of BMS has 20% higher values of cracking moment and the ultimate capacity compared with conventional RC column. There is no difference in terms of failure mode observed between the BMS concrete columns and the conventional RC columns under eccentric compression. In addition,when the eccentricity of BMS concrete column is large,the bearing capacity of BMS concrete columns can be improved with the increase of the compressive strength of BMS concrete. It is also found that the existing empirical equations in GB 50010—2010 are not suitable for the large-eccentric BMS concrete columns. So the calculation formula is modified.

关 键 词：混凝土柱 碱式硫酸镁水泥 偏心受压 静载试验 开裂荷载 承载力 挠度 

分 类 号：TU375[建筑科学—结构工程]