阀厅结构屋架与防火墙连接部位非线性有限元分析

摘要

Basedonasteelroofandreinforcedconcretestructureconnectednodeofanactualvalvehallofconvertor stationisaprototype,thisstudyadoptsthree-dimensionalelementtoestablishthemodelofconnectednodebetween steelroofandfirewall,andconsideringthefrictionalcontactbetweentheroofsoleplateandthetopoffirewallandnon-linearcharacteristicsofreinforcedconcrete.Wecarryonthenonlinearfiniteelementanalysisofsteelroofandreinforced concretestructureconnectednodeundertwoconditionsofdifferentboltdiameteranddifferentfrictioncoefficient.Dis-cussingthechangeruleoftheshearconnectioninternalforceofembeddedboltandthedisplacement,masteringthelev-elbearingcapacitycalculationmethodsofsteelroofandreinforcedconcretestructureconnectednode,putforwardthe reasonablestructuralmeasuresofsteelroofandreinforcedconcretestructureconnectednode,itprovidesbasisforthe designofsteelroofandreinforcedconcretestructureconnectednode.%　　以某实际换流站阀厅结构的钢屋架与钢筋混凝土结构连接节点为原型，采用三维实体单元建立钢屋架与防火墙连接节点的模型，并考虑屋架底板与支座的摩擦接触和钢筋混凝土的非线性特性，分别对不同螺栓直径和不同摩擦系数的钢屋架与钢筋混凝土结构连接节点进行了非线性有限元分析。探讨了预埋螺栓抗剪连接内力和位移变化规律，掌握钢屋架与钢筋混凝土结构连接节点的水平承载力的计算方法，提出了合理的钢屋架与钢筋混凝土结构连接节点构造措施，为钢屋架与钢筋混凝土结构连接节点设计提供了依据。