CAJ | 학술논문

对乐清市新体育馆采取的一种新型内外组合张弦网壳结构进行了断索分析.利用自编向量式有限元(VFIFE)程序模拟分析不同位置径向索相继断裂后该结构的内力重分布及节点变位情况,并和ANSYS生死单元法的计算结果进行比较.荷载态静力分析结果检验了向量式有限元程序在进行静力计算的正确性,而断索过程的模拟更展现了该方法在处理结构非线性动力问题的优越性.分析结果表明,内外组合张弦网壳结构在个别径向索发生断裂的情况下尽管稳定性能有所降低,依然能够继续承载,具有较好的抵抗连续破坏的能力.然而在动力效应的影响下,结构响应有一定程度的放大,断索附近的网壳相对容易出现局部失稳.本文工作为该结构的维护检修、拉索更换以及预应力空间结构的抗倒塌设计提供了参考.
대악청시신체육관채취적일충신형내외조합장현망각결구진행료단색분석.이용자편향량식유한원(VFIFE)정서모의분석불동위치경향색상계단렬후해결구적내력중분포급절점변위정황,병화ANSYS생사단원법적계산결과진행비교.하재태정력분석결과검험료향량식유한원정서재진행정력계산적정학성,이단색과정적모의경전현료해방법재처리결구비선성동력문제적우월성.분석결과표명,내외조합장현망각결구재개별경향색발생단렬적정황하진관은정성능유소강저,의연능구계속승재,구유교호적저항련속파배적능력.연이재동력효응적영향하,결구향응유일정정도적방대,단색부근적망각상대용역출현국부실은.본문공작위해결구적유호검수、랍색경환이급예응력공간결구적항도탑설계제공료삼고.
Post-damage behaviors of an inner-outer combined reticulated shell-string structure employed by Yueqing new gymnasium after cable ruptures are investigated.Analytical results such as redistributions of internal forces and nodal displacements of the structure after continuous ruptures in different cables are obtaind by developed VFIFE program and the birth-dead element method in ANSYS.Through static analyses of load state,the program of VFIFE is validated.Simulation of dynamic procedures after cable ruptures demonstrates the advantages of VFIFE in dealing with nonlinear structural dynamic problems.Numerical results show the inner-outer combined reticulated shell-string structure has good resistance against progressive damages in that it has adequate static load carrying capacity after individual cable rupture.However,the structural responses are amplified as a result of dynamic effects,which may lead to instability of the reticulated shell in local areas close to the ruptured cables.This study provides references for the future maintenance and cable exchange of the structure,as well as the collapse resistance design of pre-stressed spatial structures.