带约束拉杆L形钢管混凝土短柱的偏压试验研究

对8个带约束拉杆L形钢管混凝土偏压短柱试件进行了试验研究,讨论其在不同约束拉杆设置、偏心率以及荷载角下的偏压性能.结果表明,约束拉杆的设置改变了钢管的屈曲模态,延迟了局部屈曲的发生,有助于L形钢管混凝土偏压短柱的承载力和延性的提高.在加载后期,处于加载肢的拉杆比处于非加载肢的拉杆对核心混凝土的约束作用明显,其中双列拉杆试件的肢端拉杆比肢内拉杆的约束作用更大.临近或达到极限承载力后,近力侧钢管壁对核心混凝土的约束作用较明显.利用纤维模型法计算的试件偏压极限承载力结果与试验结果吻合良好.

Experimental research on L-shape CFT stub columns with binding bars subjected to eccentric compression

Eight L-shape concrete-filled steel tubular(L-CFT) stub columns with binding bars subjected to eccentric compression were tested.The influences of the setting of binding bars,load eccentricity,and load angles on the behaviors of L-CFT stub columns with binding bars are investigated.The experimental results indicate that by setting the binding bars the buckling mode of the steel plates can be changed;the local buckling of the steel plates can be delayed and the bearing capacity and the ductility of eccentric...