CAJ | 학술논문

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.
대8개대약속랍간L형강관혼응토편압단주시건진행료시험연구,토론기재불동약속랍간설치、편심솔이급하재각하적편압성능.결과표명,약속랍간적설치개변료강관적굴곡모태,연지료국부굴곡적발생,유조우L형강관혼응토편압단주적승재력화연성적제고.재가재후기,처우가재지적랍간비처우비가재지적랍간대핵심혼응토적약속작용명현,기중쌍렬랍간시건적지단랍간비지내랍간적약속작용경대.림근혹체도겁한승재력후,근력측강관벽대핵심혼응토적약속작용교명현.이용섬유모형법계산적시건편압겁한승재력결과여시험결과문합량호.
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-loaded specimens are improved.At the late loading stage,binding bars set in the loading side have more obvious effect on constraining the core concrete than that set in the non-loading side,and the binding bars set close to the end of loading side have more restriction effect than that set inside in the case of specimens with two columns of binding bars.Steel plates close to the end of loading side have obvious effect on constraining the core concrete when approaching or reaching the ultimate bearing capacity.The predicted results by the fiber model method agree well with experimental ones.