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空间桁架结构中的细长杆件在发生屈曲后会经历应力下降的阶段,这一现象会削弱结构的整体性能并导致当结构受到地震等其他突发外荷载时,结构的实际性能低于评估性能。为此,提出一种新的评估细长杆件后屈曲行为对结构整体影响的近似方法,并用此方法来分析结构承载力控制设计方法得到的优化结果,详细讨论考虑受压杆件后屈曲行为发生前后整体空间桁架结构性能的变化,对于结构的实际性能做出正确评估。
Slender members in space truss structures experience a stage of stress reduction after buckling, a phenomenon that weakens the overall performance of the structure and results in the actual performance of the structure being lower than that of the assessment when the structure is subjected to other unexpected loads, such as earthquakes performance. Therefore, a new method to evaluate the effect of the post-buckling behavior of the slender members on the whole structure is proposed. By using this method, the optimization results obtained by the design method of the structural bearing capacity control are analyzed. The post-buckling behavior of the slender members is discussed in detail. Before and after the occurrence of the overall space truss structure performance changes, the actual performance of the structure to make the right assessment.