齿槽连接装配式钢筋混凝土剪力墙抗震性能研究

Seismic Performance Investigation of Prefabricated Shear Wall With Tooth-grooved Connection

利用ABAQUS有限元软件,采用有限元数值模拟方法,分析在低轴往复荷载下齿槽型连接的装配式钢筋混凝土剪力墙抗震性能。通过改变齿键高度、混凝土强度、轴压比、配筋率等参数,研究其对齿槽型连接的装配式钢筋混凝土剪力墙滞回性能的影响,并绘制骨架曲线,研究其对水平承载力和延性的影响。结果表明:随着齿键高度的提高,齿槽型连接的装配式钢筋混凝土剪力墙受力后期强度略有提高;当着轴压比增大,结构延性和耗能能力有所降低,承载力得到提高;随着混凝土强度的提高,结构承载能力提高比较明显,延性逐渐降低;当墙体纵向配筋率提高,结构承载能力提高显著,耗能能力逐渐增大,但过高的配筋率会降低结构的延性,过低的配筋率会使结构过早破坏。

By using ABAQUS finite element software,the seismic performance of prefabricated shear wall with tooth-grooved connection under the low cycle reciprocating loading was analyzes with the method of finite element numerical simulation.And by changing the parameters of prefabricated shear wall,such as the length of tooth-grooved,concrete strength,axial compression ratio,reinforcement ratio,the influences on the performances of hysteretic and energy dissipation were analyzed. What＇s more,the skeleton curves were derived for further analysis of the influence on the horizontal bearing capacity and ductility.The results demonstrate that increasing the length of tooth-grooved can improve the strength of specimens in later stages.Increasing the axial compression ratio can reduce the ductility and energy dissipation capacity of specimens,but improve the bearing capacity. Increasing concrete strength can improve the bearing capacity obviously but reduce the ductility gradually. When the longitudinal reinforcement ratio of the wall increases,the bearing capacity of the structure increases significantly,the energy dissipation capacity increases gradually,while the high reinforcement ratio will reduce the ductility of the structure,and the low reinforcement ratio will cause premature damage to the structure.