不同弹塑性分析软件在超限高层建筑抗震性能分析中的联合应用研究

基于性能的设计方法很难将结构整体与局部关键构件的性能用一种结构分析软件全面把握,联合使用目前成熟的动力弹塑性分析软件PERFORM-3D和ABAQUS,可以利用各自特点对结构的抗震性能进行全面评价。以某超限高层结构为例,首先建立该结构在大震作用下所需达到的抗震性能目标,在PERFORM-3D软件中对整体结构在不同水准下的性能目标直接进行定义,使用ABAQUS软件对关键构件的钢骨、钢筋等局部应力状态进行分析。通过对结构构件性能水准的整体判定和关键构件的局部分析,全面评价了该超限高层结构的抗震性能,从而确定其是否达到预期的抗震性能目标。结果表明,两种软件的联合应用既可以反映结构的整体抗震承载力及抗侧刚度,又能够很好地把握结构关键构件的局部应力状态,可以更为全面且可靠地反映结构的抗震性能。

Combined application of different elasto-plastic software on performance-based seismic analysis of tall building structures beyond code-specification

The performance-based seismic design can hardly reflect the changes of global structure and local components performance by single software. Combined application of PERFORM-3D and ABAQUS can use their characteristics to make a comprehensive assessment of the structure seismic performance. Taking a tall building beyond code-specification as an example, performance levels and performance goals of tall buildings beyond the code-specification under major earthquake were established. The performance goals of all components under different levels can be defined in PERFORM-3D, and the stress-strain state of the steel in important components can be analyzed by ABAQUS. A comprehensive assessment of the structure seismic performance can be obtained by judging the global performance goals and the local stress-strain state. The result shows that combined using of these two kinds of software can reflect the seismic resistance of the structure, and the stress-strain state of local components. The assessment of seismic performance of the structure is more comprehensive and reliable by the combined application of the two kinds of software.