Effect of Bidirectional Quasi-static Loading Rule on Hysteretic Properties of Reinforced Concrete High Pier
双向拟静力加载规则对钢筋混凝土高墩滞回性能的影响

The influence of bidirectional quasi-static loading rule on the hysteretic properties of reinforced concrete high pier was preliminarily studied by bidirectional quasi-static test of four reinforced concrete high piers. The tested specimens design, loading devices, testing method and loading rules were firstly introduced in this paper. The bidirectional quasi-static test of reinforced concrete high piers was carried out with four different loading patters: diagonal loading patter, square loading patter, diamond loading patter and circle loading patter. Hysteretic characteristics, including load-displacement hysteretic curves, load-displacement skeleton curves, load degradation, rigid degradation as well as accumulative hysteretic dissipated energy were emphatically compared, and the relationship between hysteretic characteristics and load rules was analyzed. It is concluded that the bi-directional hysteretic properties were well obtained by using the diagonal loading rule, so this loading rule is available and recommended in bidirectional quasi-static test for reinforced concrete high pier.