摘要
为了探讨轻骨料矩形钢管混凝土框架的抗震性能,以柱截面含钢率、梁截面形式为参数进行了4榀框架试件在恒定轴力与低周反复水平荷载共同作用下的试验研究.研究结果表明,轻骨料矩形钢管混凝土框架结构的滞回曲线较为饱满,没有明显的捏缩现象,表现出良好的抗震耗能能力;各试件位移延性系数在3.00~3.74之间,能量耗散系数在1.438-2.324之间,表明轻骨料矩形钢管混凝土框架结构具有良好的塑性变形能力和抗震耗能能力;随着柱含钢率的增大,框架的承载力、延性和耗能能力有不同程度的提高;在相同柱截面含钢率情况下,采用工字型钢梁的框架与采用轻骨料矩形钢管混凝土的框架相比,延性与耗能能力有小幅的提升,刚度退化较为平缓.
In order to realize the seismic behavior of lightweight aggregate concrete filled RST（rectangular steel tube）frames,four test specimens were experimentally studied under constant axial load and cyclical lateral load.The form of beam section and steel ratio of column section are considered as experimental parameters.The examination results show that the hysteretic curves of lateral load versus lateral displacement of the frames are of plump shuttle in shape,indicating that the frames have excellent seismic behavior.The deformation ductility coefficients are between 3.00 and 3.74;the energy dissipation coefficients are between 1.438 and 2.324,which explains the excellent ability of deformation ductility and energy dissipation of the frames.The capacity,ductility and energy dissipation have obvious exaltation with the increase of steel ratio of column section.The frames adopting steel beam have stable capactity and excellent deformability under the same steel ratio of column section.
出处
《内蒙古科技大学学报》
CAS
2010年第3期272-276,284,共6页
Journal of Inner Mongolia University of Science and Technology
关键词
轻骨料矩形钢管混凝土
框架
抗震性能
延性
耗能
lightweight aggregate concrete filled RST
frame
seismic behavior
ductility
energy dissipation
