CAJ | 학술논문

为研究粘结滑移对型钢轻骨料混凝土梁受力性能的影响，对型钢轻骨料混凝土梁进行了非线性有限元模拟，并且和试验结果进行了比较。基于型钢和混凝土界面存在的粘结力，引入局部粘结滑移本构关系，对型钢应力分布、裂缝形态、荷载一挠度曲线进行了分析。分析中考虑了剪跨比、型钢放置情况等影响因素。分析结果表明：型钢轻骨料混凝土梁受力性能和型钢普通混凝土梁相似，随剪跨比增大，逐渐由斜剪破坏过渡到弯曲破坏。荷载一挠度曲线可明显地划分为三个阶段。考虑粘结的有限元分析结果和试验结果吻合较好，未考虑粘结的有限元计算承载力和刚度均比试验值大。
위연구점결활이대형강경골료혼응토량수력성능적영향，대형강경골료혼응토량진행료비선성유한원모의，병차화시험결과진행료비교。기우형강화혼응토계면존재적점결력，인입국부점결활이본구관계，대형강응력분포、렬봉형태、하재일뇨도곡선진행료분석。분석중고필료전과비、형강방치정황등영향인소。분석결과표명：형강경골료혼응토량수력성능화형강보통혼응토량상사，수전과비증대，축점유사전파배과도도만곡파배。하재일뇨도곡선가명현지화분위삼개계단。고필점결적유한원분석결과화시험결과문합교호，미고필점결적유한원계산승재력화강도균비시험치대。
Nonlinear finite element simulation is conducted for steel reinforced lightweight concrete beams to investigate the bond-slip influence on their mechanical properties compared with the experimental results. The steel stress distribution, cracks form, load-deflection curve are analyzed through introducing the local bond-slip constitutive relationship based on the existing bond force between the section steel and concrete interface. Influence factors involving shear span ratio and steel placing situation are considered. Analysis results show that the mechanical properties of the steel reinforced lightweight concrete beams are similar with that of the steel reinforced normal concrete beams. Diagonal shear failure are gradually transformed to flexural failure with the shear span ratio increasing. Loaddeflection curve is obviously divided into three stages. Finite analysis results considering the bond agree well with the test results, while the capacity and stiffness without considering the bond are bigger than the experimental values.