CAJ | 학술논문

为明确纤维模型和分离式模型在应用于桥梁抗震分析中的差异,本文利用通用有限元软件ABAQUS,采用混凝土弹塑性损伤模型,对某连续刚构桥建立了分离式模型.考虑桥墩高宽比变化,进行了罕遇地震下的弹性与弹塑性动力时程分析,并将结果与纤维模型分析的结果进行对比研究.分析表明:在弹性状态,两种模型的分析结果受桥墩高宽比影响较小,能得到较一致的解答;在弹塑性阶段,纤维模型具有更高的计算效率,但对于弯曲破坏不明显的桥梁结构其分析结果并不能反应桥墩的真实损伤情况,对于弯曲破坏显著的桥梁结构却不失为一种有效的工程分析方法;应用分离式模型进行弹塑性动力分析,能够直观地反映桥梁结构的损伤分布,是一种更为合理更为精细的弹塑性动力分析方法.
위명학섬유모형화분리식모형재응용우교량항진분석중적차이,본문이용통용유한원연건ABAQUS,채용혼응토탄소성손상모형,대모련속강구교건립료분리식모형.고필교돈고관비변화,진행료한우지진하적탄성여탄소성동력시정분석,병장결과여섬유모형분석적결과진행대비연구.분석표명:재탄성상태,량충모형적분석결과수교돈고관비영향교소,능득도교일치적해답;재탄소성계단,섬유모형구유경고적계산효솔,단대우만곡파배불명현적교량결구기분석결과병불능반응교돈적진실손상정황,대우만곡파배현저적교량결구각불실위일충유효적공정분석방법;응용분리식모형진행탄소성동력분석,능구직관지반영교량결구적손상분포,시일충경위합리경위정세적탄소성동력분석방법.
To find out the differences between fiber model and separate model in bridge seismic analysis, a separate model is built for a continuous rigid frame bridge in ABAQUS by making use of concrete plastic damage model. Considering the change of depth-width ratio of pier,elastic and elastoplastic dynamical analysis is carried out,and the results are compared with the fiber model. Analysis shows that: In elastic state, the depth-width ratio has little influence to the two models, and the two models get a closer result; the separated model gives a more reasonable result, and it is a effective elastic to plastic dynamical analyzing method; In elustoplustic state, the fiber model has a higher calculating efficiency, but for the bridge with shearing destroy model it cannot reflect the actual damage, for these bridges with bending destroy model it is still a effective method; Using separate model in dynamic analysis gives a intuitive damage distribution, and it is a more reasonable and meticulous method.