不同配箍形式型钢混凝土柱抗震性能试验研究

Experimental study on seismic behavior of SRC columns with different stirrup configuration

为研究不同配箍形式对型钢混凝土(SRC)框架柱抗震性能的影响,进行了8个1∶2比例SRC柱试件的低周反复加载试验。主要研究参数为配箍形式、体积配箍率和剪跨比。通过试验研究了各参数对试件强度衰减、延性、滞回特性和耗能能力等性能的影响。研究表明,试件变形能力随体积配箍率和剪跨比的增大而增大,强度衰减随配箍率的增大而减小,配箍率对试件刚度衰减影响不明显。配箍形式对SRC柱滞回性能有明显影响,八角复合箍优于井字复合箍,矩形箍增设角箍,可有效延缓纵筋压曲,提高试件的极限承载能和变形能力。研究成果可为SRC结构工程实践提供参考。

Eight steel reinforced concrete（SRC） columns were tested under cyclic loading to investigate the effect of stirrup configurations on the seismic performance of SRC columns.The main test parameters are stirrup configuration,stirrup ratio and shear span ratio of model columns.The effects of the parameters on the strength,ductility,hysteretic behavior and energy dissipation capacity of SRC columns are discussed based on test results.It is indicated that the deformation capacity of the model columns increased with the increase of stirrup ratio and shear span ratio.The strength deterioration is improved with the increase of stirrup ratio.Stirrup ratio has no obvious effect to the stiffness deterioration of specimens.The seismic performance of the specimens with octagonal overlapping stirrup is better than that with four-leg stirrups.The ultimate carrying capacity and deformation capacity can be improved when additive triangular stirrup is setup to the specimen with rectangular stirrup.