In order to study the effect of replacing 20%cement with mass such as glass powder and 30%natural sand with mass such as wind-deposited sand on the seismic performance of concrete columns,this paper designed and produced 4 concrete column specimens.The first one is an ordinary concrete column,the second one is a concrete column with 20%of cement replaced by glass powder and other mass,the third one is a concrete column with 30%of river sand replaced by windy sand and other mass,and the fourth one is also made of glass powder.Concrete columns that replace 20%cement and 30%river sand with equal mass and aeolian sand respectively.Through the low-cycle reciprocating load test,the failure form,bearing capacity,hysteretic performance,skeleton curve,energy dissipation capacity,ductility coefficient,stiffness degradation law and deformation characteristics of each specimen were comparatively analyzed.The results show that:replacing cement with 20%substitution rate of glass powder and replacing natural river sand with 30%substitution rate of aeolian sand can improve the seismic performance of concrete columns and reduce the degree of component damage;based on the test results and the method proposed by Fajfar and Park-Ang For the earthquake damage model,the energy dissipation factor"β"was corrected,and the modified Park-Ang damage model was obtained,which was in good agreement with the test process of the abandoned glass powder aeolian sand concrete columns.
关键词
玻璃粉/风积沙/混凝土柱/抗震性能/损伤模型
Key words
glass powder/aeolian sand/concrete column/seismic performance/damage model
维普
万方数据