空间钢构架混凝土梁纯扭性能的有限元模拟分析  

Finite element analysis of the pure torsion behavior of spatial steel frame concrete beams

作　　者：张宇阳 唐兴荣[1] ZHANG Yuyang;TANG Xingrong(School of Civil Engineering,SUST,Suzhou 215011,China)

机构地区：[1]苏州科技大学土木工程学院,江苏苏州215011

出　　处：《苏州科技大学学报（工程技术版）》2021年第3期50-56,共7页Journal of Suzhou University of Science and Technology（Engineering and Technology Edition）

摘　　要：为进一步研究空间钢构架混凝土梁的纯扭性能,在已有试验的基础上,以空间钢构架抗扭弦杆配钢特征值、空间钢构架抗扭腹杆配箍特征值以及空间钢构架的配筋强度比等为参数,进行了32根空间钢构架混凝土梁和一根普通钢筋混凝土梁,以及一根设置斜缀条的空间钢构架混凝土梁有限元模拟分析。研究结果表明,空间钢构架混凝土梁较普通钢筋混凝土梁具有较好的纯扭性能,其极限扭矩与空间钢构架抗扭弦杆配钢特征值、空间钢构架抗扭腹杆配箍特征值成正比,另外,增设斜缀条可大幅度提升空间钢构架混凝土梁的纯扭性能。在试验研究和有限元计算结果的基础上,建立空间钢构架混凝土梁抗扭承载能力计算公式,公式计算结果与试验值和模拟值吻合较好,为空间钢构架混凝土梁的工程应用提供技术支撑。In order to further study the pure torsion behavior of spatial steel frame concrete beams,the finite element simulation of 32 spatial steel frame concrete beams,a common reinforced concrete beam and a space steel frame concrete beam with oblique bars is carried out,and the effects of various parameters,i.e.,the characteristic values for anti-torsion steel angles and anti-torsion strips of the spatial steel frame,reinforcement strength ratio of the spatial steel frame,were considered respectively on the basis of the experiment.The results show that the spatial steel frame concrete beam has better pure torsion behavior than the ordinary reinforced concrete beam,and its ultimate torque is proportional to the characteristic value of the space steel frame torsional chord and the space steel frame torsional joint.In addition,the pure torsion performance of spatial steel frame concrete beam can be greatly improved by setting up inclined abdomen pole.Based on the experimental research and finite element calculation results,a formula for calculating the torsional bearing capacity of spatial steel frame concrete beam is established.And the formula is in good agreement with the test value and the simulation value,which can provide technical support for the engineering application of the space steel frame concrete beam.

关 键 词：空间钢构架 混凝土梁 纯扭性能 承载力计算公式 有限元分析 

分 类 号：TU375.1[建筑科学—结构工程]