CAJ | 학술논문

文章将网架上弦用混凝土板代替、下弦用拉索代替并施加预应力，形成索一混凝_-kb~-N应力组合网架。利用ANSYS有限元软件建立该结构的模型，分别分析其基于结构最大位移和腹杆最大应力两种性能下的正常使用极限可靠度，其中建立模型时将结构离散成板单元、粱单元、杆单元和索单元，各单元之间通过节点彼此相连。经软件分析得出在所给几何尺寸、材料特性、预应力、恒荷栽以及活荷载等随机变量作用下，结构分别基于位移和腹杆应力正常使用极限状态下的可靠度都是良好的；对结构位移和腹杆应力影响最大的变量都是荷载，影响最小的变量都是混凝土板厚度以及肋的厚度与宽度；预应力荷栽和外荷栽对结构位移和腹杆应力起相反的影响作用。
문장장망가상현용혼응토판대체、하현용랍색대체병시가예응력，형성색일혼응_-kb~-N응력조합망가。이용ANSYS유한원연건건립해결구적모형，분별분석기기우결구최대위이화복간최대응력량충성능하적정상사용겁한가고도，기중건립모형시장결구리산성판단원、량단원、간단원화색단원，각단원지간통과절점피차상련。경연건분석득출재소급궤하척촌、재료특성、예응력、항하재이급활하재등수궤변량작용하，결구분별기우위이화복간응력정상사용겁한상태하적가고도도시량호적；대결구위이화복간응력영향최대적변량도시하재，영향최소적변량도시혼응토판후도이급륵적후도여관도；예응력하재화외하재대결구위이화복간응력기상반적영향작용。
Abstract: This paper presented a kind of nets forms. Its top boom of the nets was replaced by the concrete slab , and the bottom chord bar was replaced by pre-stressed cables. The structure model was framed with ANSYS element software. The reliability was analyzed when it was normal used with the largest displacement and belly bars stress as the limits. The structure was scattered into slab elements, beam elements, pole ele- ments and cable elements. And these elements were through the nodes connected to each other. The reliabilty meet the requirements when the structure was acted by presented random variables including geometry size,material properties, prestress, dead loads. The biggest variables that affect displacements and belly bars stress are cable prestress and external load ,and the least variables are concrete slab depth, rib depth and width. The displacement and slab's stress is adverse effect when the prestress and the external load acts respectively.