CAJ | 학술논문

对钢筋混凝土框架整体结构中梁、柱、板构件截面进行离散，并对高温损伤后构件(梁、板)截面中的纤维赋予相应温度的材性，对板采用分层壳单元模型，并赋予每层单元相应温度的材性，使受损构件和非受损构件结合组成整体框架结构。利用 SAP2000方便快速的建模功能，然后导入 ABAQUS中，利用其强大的非线性分析功能进行高温后框架整体力学性能的分析。通过对比发现：荷载—位移曲线、应变等与试验结果吻合较好，表明该方法可靠。借助这种方法，进一步进行了悬臂梁、框架梁火后的应变比较和荷载位移曲线比较并探究其规律，结果表明：翼缘对悬臂梁的承载力和刚度的提高幅度较大，翼缘对框架梁的影响较小。
대강근혼응토광가정체결구중량、주、판구건절면진행리산，병대고온손상후구건(량、판)절면중적섬유부여상응온도적재성，대판채용분층각단원모형，병부여매층단원상응온도적재성，사수손구건화비수손구건결합조성정체광가결구。이용 SAP2000방편쾌속적건모공능，연후도입 ABAQUS중，이용기강대적비선성분석공능진행고온후광가정체역학성능적분석。통과대비발현：하재—위이곡선、응변등여시험결과문합교호，표명해방법가고。차조저충방법，진일보진행료현비량、광가량화후적응변비교화하재위이곡선비교병탐구기규률，결과표명：익연대현비량적승재력화강도적제고폭도교대，익연대광가량적영향교소。
A frame structure with damaged and undamaged members was modelled by assembling the rein-forced concrete beam, column, floor members. Material properties of the damaged members after high temper-ature were considered. By using the convenient and fast modeling function of SAP2000, beams and columns were modeled by fiber elements and the layered shell elements were used to model the floor. This model was then imported into the ABAQUS for nonlinear analysis. It was found that the load-displacement curves and strain curves are in good agreement with experiment results. Based on this method, further investigations were made to compare the strain curves and load displacement curves of cantilever beams and frame beams after fire. The results shows that the bearing capacity and stiffness of the cantilever beam increase more than those of the frame beam with the flange contributions.