Research on the seismic behaviour of hollow prefabricated square column with high-strength reinforcement using UHPC grouting materials

Abstract

In this study, a hollow prefabricated square column with high-strength reinforcement is developed to realise optimum seismic performance and promote the application of high-performance materials in columns. A column and cap constructed for testing using the ultrahigh-performance concrete grouting material are connected using grouted sleeves. The seismic performance of the proposed column is evaluated by comparing and analysing the responses of the proposed column and that of two other types of columns under cyclic load. Further, the effects of the longitudinal steel bars strength and volume of the hollow part of the column on the seismic performance of the proposed column are studied. The experimental results shown that the configuration of the high-strength reinforcement in the column positively influence its seismic performance. The modification of the reinforcement strength and hollowing rate of the column have some degree of influence on the structural response of the proposed column under cyclic loading, which lay a foundation for optimal design of the structure of the proposed column.