钢骨高强混凝土叠合柱抗震性能试验研究

STUDY ON ASEISMATIC BEHAVIOR OF STEEL-ENCASED HIGH?STRENGTH CONCRETE LAMINATED-COLUMN UNDER CYCLIC LOADING

通过对五根钢骨高强混凝土叠合柱进行了往复荷载作用下的试验 ,对其破坏形态、变形能力、耗能性能和应变分布等进行了探讨 ,考察了叠合的方法对柱抗震性能的改善程度。

A partial load by the designed laminated?ratio is loaded on the steel?encased concrete column while the designed concrete strength is reached. Then the outside layer concrete of column is poured. The remained axial load is added after reaching the designed strength of the outside concrete. This is so?called the laminated?column. Tests on five pieces of steel?encased high?strength concrete laminated?columns under cyclic loading are carried out in the paper. The influences of nominal axial?compression?ratio, laminated?ratio, and concrete strength on the failure modes, deformation, dissipation energy, and strain distribution are also discussed. Some useful conclusions are obtained from the study.