摘要
利用有限元软件ABAQUS数值模拟了圆中空夹层钢管混凝土柱受剪切作用时剪应力与剪应变的关系曲线,并通过对大量算例的分析,确定了构件不同破坏形式的剪跨比范围,研究了内外钢管屈服强度、截面名义含钢率、内管径厚比、空心率及混凝土强度对剪应力-剪应变关系曲线的影响规律。研究结果表明:剪跨比不大于0.1时,圆中空夹层钢管混凝土柱抗剪承载力可按纯剪构件计算,并给出了抗剪承载力的简化计算公式。公式计算结果与有限元计算结果吻合较好。
When concrete- filled double- skin circular steel tubular columns were subjected to shear, the relationshipsbetw een the shear stress and the shear strain w ere numerically simulated by the finite element softw are ABAQU S.T hrough the analysis of a large number of calculation examples, the shear span ratio ranges of components indifferent failure modes were determined, and the inf luence law s of yield strengths of inner steel tube and outer steeltube, section nominal steel ratio, diameter thickness ratio of inner tube, hollow ratio and concrete strength on shearstress- strain relation curves w ere studied. The results show that when shear span ratio is not more than 0. 1, the shearbearing capacity of a concrete- filled double- skin circular steel tubular column could be calculated as a pure shearbearing component. A simplif ied calculation formula of shear bearing capacity was put forw ard. The calculationresults using the formula are in good agreement with that using finite element simulation.
出处
《铁道建筑》
北大核心
2017年第8期45-49,共5页
Railway Engineering
基金
国家自然科学基金(51378206
51608199)
江西省研究生创新基金(YC2016-S250)
关键词
圆中空夹层钢管混凝土柱
纯剪
试验研究
数值模拟
抗剪承载力
C oncrete- filled double- skin circular steel tubular column
Pure shear
Experimental study
Numericalsimulation
Shear bearing capacity
