高钛重矿渣骨料钢筋混凝土柱大偏压试验研究

摘要

The mechanical behaviors of 12 steel reinforced columns with various aggregate types and eccentricities were tested under large eccentric compression loads ( e0/h=0.32, 0.40 and 0.48 ). The failure mode, cracking strength, ultimate strength and deformation of the columns with high titanium heavy slag aggregate are evaluated and compared with those of conventional steel reinforced concrete columns. The test results indicate that the failure pattern of the columns with high titanium heavy slag aggregate is similar to that of conventional concrete columns. The strength and stiffness of the column with coarse aggregate of high titanium heavy slag aggregate gravel and fine aggregate of natural sand are superior to those of conventional concrete columns. The cracking strength, load carrying capacity and stiffness of the columns with totally high titanium heavy slag aggregate or coarse aggregate of natural gravel and fine aggregate of high titanium heavy slag sand are close to those of conventional concrete columns. Based on the test results, the load-deformation curves of all specimens were numerical calculated by finite element method. The simulated results are found to be in good agreement with test data, which indicates that the theoretical model can be used to predict the load-deformation response of the columns with high titanium heavy slag aggregate.%与普通钢筋混凝土对比研究了渣砂渣石、渣砂普石和普砂渣石三种高钛重矿渣钢筋混凝土试件在三种大偏心率(e0/h=0.32、0.40和0.48)荷载作用下的力学性能，对试件的破坏形态、开裂荷载、极限承载力和最大挠度进行了分析，发现三种高钛重矿渣钢筋混凝土柱的大偏压破坏形态与普通钢筋混凝土柱相似，普砂渣石高钛重矿渣钢筋混凝土试件的强度、刚度优于普通骨料钢筋混凝土，渣砂渣石和渣砂普石这两种高钛重矿渣钢筋混凝土试件的开裂荷载、极限承载力以及刚度与普通钢筋混凝土试件接近。此外，在试验的基础上采用有限元法对所有试件的极限荷载-挠度曲线进行计算，并将计算与试验进行对比分析。结果表明，采用有限元法能够较好地预测三种高钛重矿渣钢筋混凝土试件在大偏压作用下的极限承载能力。