论文部分内容阅读
为研究考虑损伤退化的钢材等效本构模型在整体框架中的应用及其用于强震作用下钢框架结构弹塑性时程分析的可行性,选取已有典型钢框架静力及动力试验,对其分别采用等效本构模型和传统的两折线模型进行计算,并与试验结果进行对比分析,验证等效本构模型的可靠性和对计算精度的提高作用。在此基础上,将等效本构模型应用于10层钢框架结构抗震性能分析中,采用增量动力分析法,研究损伤累积退化对多高层钢框架结构强震作用下动力响应的影响,并与不考虑损伤退化的模型计算结果进行对比分析。分析结果表明:累积损伤退化的发生会加剧结构的动力响应,若不考虑此影响,会低估结构变形,导致结构存在一定的安全隐患。采用等效本构模型的增量动力分析能够较为合理地反映结构在强震作用下的承载性能退化现象,但不同地震波作用下的计算结果差异较大。
In order to study the application of steel equivalent constitutive model considering damage degradation in the whole frame and the feasibility of elastoplastic time-history analysis of steel frame structure under strong earthquake, the static and dynamic tests of the typical steel frame are selected, Equivalent constitutive model and traditional two-fold model are used respectively to calculate and compare with the experimental results to verify the reliability of the equivalent constitutive model and improve the calculation accuracy. On the basis of this, the equivalent constitutive model is applied to the seismic performance analysis of 10-story steel frame structure. The incremental dynamic analysis method is used to study the effect of damage accumulation degeneration on the dynamic response under the strong earthquake of multi-level steel frame structures. The results of the model calculation are compared with those without considering the damage degradation. The analysis results show that the occurrence of cumulative damage degeneration will aggravate the dynamic response of the structure. If this effect is not taken into account, the structural deformation will be underestimated, resulting in some potential safety hazard. The incremental dynamic analysis based on the equivalent constitutive model can reasonably reflect the bearing capacity degradation of the structure under the action of strong earthquakes. However, the calculation results under different seismic waves are quite different.