基于ABAQUS的SRC梁受剪承载力预测及连续梁数值研究  

Prediction of shear capacity of SRC beam and numerical study of continuous beam based on ABAQUS

作　　者：姚刚峰 熊学玉[2] 肖启晟 YAO Gangfeng;XIONG Xueyu;XIAO Qisheng(School of Civil Engineering,Suzhou University of Science and Technology,Suzhou 215011,China;College of Civil Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]苏州科技大学土木工程学院,苏州215011 [2]同济大学土木工程学院,上海200092

出　　处：《建筑结构》2024年第22期86-92,共7页Building Structure

基　　金：国家自然科学基金面上项目(51578400)。

摘　　要：为准确预测型钢混凝土(SRC)梁的受剪承载力及深入认识SRC连续构件的受剪性能,首先,利用ABAQUS建立了适用于SRC梁受剪分析的数值模型,同时考虑了箍筋及型钢对混凝土的约束效应;利用57根SRC梁的受剪承载力试验数据,验证了模型的合理性;通过进一步分析混凝土强度等级、含钢量、配箍率等设计参数对承载力预测精度的影响,探究了模型的适用范围。其次,研究了混凝土损伤塑性(CDP)模型中膨胀角及粘性系数这两个参数的影响,发现,膨胀角和粘性系数对小剪跨比试件的影响较为敏感,建议粘性系数可取0.0001~0.0005,非强约束区膨胀角可取35°~40°,强约束区取为56°。最后,利用所建模型探究了SRC连续梁的受剪机理及剪跨比对其承载力的影响。In order to achieve an accurate prediction of shear capacity of steel reinforced concrete(SRC)beams and deeply understand the shear behavior of SRC continuous members,a numerical model suitable for shear analysis was firstly established with ABAQUS,which considered the concrete-confined effect by stirrups and steel.The rationality of the model was validated using the data from fifty-seven SRC shear beams.To explore the application scope of the model,the influences of design parameters,such as concrete strength grade,steel shape ratio,stirrup ratio,etc.,were studied in further.Then,the effects of two parameters,including dilation angle and viscosity coefficient,in the CDP model were also researched.It is found that the influences of dilation angle and viscosity coefficient are more sensitive to the specimens with lower shear-span ratios.It is suggested that the viscosity coefficient is taken as 0.0001~0.0005 and the dilation angle is taken as 35°~40°for non-strong-confined zone and 56°for strong-confined zone.Finally,the shear mechanism of SRC continuous beams and the influence of shear-span ratio on the shear capacity were studied with the established model.

关 键 词：型钢混凝土 受剪承载力 约束混凝土本构 CDP模型 连续梁 

分 类 号：TU398[建筑科学—结构工程]