Drift behaviour of lightly reinforced concrete columns and structural walls for seismic design applications

摘要

This paper presents the findings of a research project investigating the lateral load drift behaviour of lightly reinforced concrete columns and structural walls. Such columns and walls are common in regions of low-moderate seismicity, and although their strength properties are well defined, the drift performance is less understood. A detailed and simplified model for predicting the load-drift behaviour of reinforced concrete columns and structural walls is described in this paper. The results of a case study example are presented and clearly indicate the dramatic impact that the axial load ratio has on the drift performance of lightly reinforced columns, particularly the significantly lower drift capacities that are available in compression dominated columns. The detailed model for both columns and wall specimens provided very good load-drift correlation with an extensive database of experimental tests. In contrast, the simplified model provided a quick, useful, conservative and approximate guide for estimating the drift capacities of reinforced concrete and structural wall specimens for design purposes.