EXPERIMENTAL STUDY ON THE STRENGTH, STIFFNESS AND DEFORMATION CAPACITY OF EXPOSED CFT COLUMN BASE

为明确钢管混凝土半嵌套柱脚的弹塑性性能，对其进行了单调加载试验和反复加载试验。试验参数为埋设长度(4种)和加载方式(单调加载和循环加载)，试验结果表明：1)埋设长度越小，刚度越小；2)埋设长度越小，刚度越小；3)用锚杆、埋设钢管和钢筋提供的强度之和来评价强度。

In order to clarify the elastic-plastic behavior of CFT half-embedded column base, which was newly developed to improve the performance of the conventional exposed column base, the monotonic and the cyclic loading tests were carried out. The test parameters were the embedded length (4 kinds) and loading method (monotonic and cyclic loading).It is concluded that i) three kinds of failure modes were observed, ii) the shorter embedded length causes smaller stiffness, and iii) the strength was well evaluated by the sum of the strengths provided by anchor bolts, embedded steel tube and reinforcing bars.