CAJ | 학술논문

为保证桁架结构的安全性，在结构设计中进行可靠性计算是必要环节。桁架结构由于杆件截面各异，空间组成复杂，杆件连接焊缝多样，使原本困难的桁架结构可靠性计算变得更加复杂而繁琐。现有计算方法大多分别考虑杆件和连接焊缝的失效模式，再考虑各失效模式下桁架结构载荷的重分布影响，而忽略了杆件和焊缝各种失效模式之间的干涉关系。文中将杆件及其端部的连接焊缝作为一个单元，通过建立单元失效干涉数学模型，推导出受压弯载荷杆件和焊缝的失效干涉判定公式，计算各种失效模式的概率失效带，绘制单元失效干涉图，确定模糊可靠性的应用范围，得出杆件在缓慢加载失效模式不产生干涉的载荷变化幅度。
위보증항가결구적안전성，재결구설계중진행가고성계산시필요배절。항가결구유우간건절면각이，공간조성복잡，간건련접한봉다양，사원본곤난적항가결구가고성계산변득경가복잡이번쇄。현유계산방법대다분별고필간건화련접한봉적실효모식，재고필각실효모식하항가결구재하적중분포영향，이홀략료간건화한봉각충실효모식지간적간섭관계。문중장간건급기단부적련접한봉작위일개단원，통과건립단원실효간섭수학모형，추도출수압만재하간건화한봉적실효간섭판정공식，계산각충실효모식적개솔실효대，회제단원실효간섭도，학정모호가고성적응용범위，득출간건재완만가재실효모식불산생간섭적재하변화폭도。
In order to ensure the safety of structure,reliability calculation is necessary for the truss structure design. Since of truss number cross-section is different,spatial composition is complex,attachment weld is Diversity,so that the original is difficult to calculate the reliability of the truss structure becomes more complex and cumbersome.For effect on truss overall load redistribution,in the existing calculation method,all the failure modes of steel nmber and attachment weld are calculated.But the interference of stel nmber and attachment weld failure modes are igngred.Steel number and attachment weld are considered as a unit and the interference of unit failure modes figure are drew,through calculating the range of different failure modes and building interference model of unit failure modes.The judgment formula of interference of unit failure modes is deduced.The aplication conditions of the fuzzy reliability is obtained,the load range of slowly load-ing unit which does not produce interference of failure modes is obtained.