空心普通和再生钢管混凝土柱抗震性能研究Ⅰ:试验与有限元研究

Seismic Behavior Study of Hollow Ordinary Concrete and Recycled Aggregate Concrete Filled Steel Tubular (CFST) Columns Ⅰ:Experimental and FEM Study

目前,空心钢管混凝土结构被大量应用和推广,但对其抗震性能的研究却比较少,制约了其在实际工程中的进一步应用。对空心普通和再生钢管混凝土柱的抗震性能进行了试验与有限元研究,首先介绍了3根空心圆钢管混凝土柱在定轴力和水平反复荷载作用下的滞回性能试验,分析了不同混凝土和空心率对试件耗能能力及位移延性等抗震性能的影响,研究表明再生混凝土构件的抗震性能要差于相应普通混凝土,而空心率越大,构件的延性和耗能能力越小。其次,采用有限元软件ABAQUS对空心钢管混凝土压弯构件的荷载-位移骨架曲线进行了大量数值计算,分析了各参数对构件骨架曲线及延性的影响。

At present, hollow concrete filled steel tubular （CFST） structure has been extensively applied, but there is little research on the seismic behavior of it. The paper mainly introduce the experimental studies on the seismic behavior of hollow ordinary concrete and recycled aggregate CFST columns under axial load and cyclic horizontal load. The paper analyzes the seismic behavior like energy dissipation and ductility under different kinds of concrete and hollow ratios. The results show that the seismic behavior of recycled components are worse than the ordinary ones. The greater the hollow ratio is,the smaller the ductility and energy dissipation capacity of members are. Second, extensive FEA has been conducted using software ABAQUS to obtain the load-displacement skeleton curves of hollow CFST components under compression and bending. Then the influence of the parameters on the skeleton curves is investigated.