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Lateral Force Resistance Performance Of Steel Keel Braced Steel Frame System Based On Semi-rigid Connection

Posted on:2015-03-05Degree:MasterType:Thesis
Country:ChinaCandidate:R L GuoFull Text:PDF
GTID:2252330428984270Subject:Structural engineering
Abstract/Summary:PDF Full Text Request
In the traditional design of steel frame, rigid nodes are more commonly adopted,we less consider whole structural ductility. Semi-rigid nodes are the simple structure,the high construction efficiency, the good ductility. Combining with light steel keelbraced in the application of building system, the paper puts forward the semi-rigidsteel frame-light steel keel braced structure system. Skin panels and light steel keelare the main and energy dissipation component to resist lateral force. Under the actionof the low level of reciprocating load, five steel frame of light steel keel braced wallare researched for lateral force resistance. We analyze the form of light steel keelbraced and beam-column connection nodes impact on wall body resistance to lateralforce. Based on the experimental study, steel frame-shear failure mode of the lightsteel keel braced and hysteretic performance of reciprocating under horizontal load isanalyzed, and the corresponding calculation formula is deduced. It puts forward thesuggestions of how to design and engineering application. Paper mainly completedthe following content:(1) By changing the form of light steel keel braced and beam-column connectionnode form, there are5groups: hinged steel frame filled light steel keel, hinged steelframe filled nodes to strengthen the light steel keel, hinged steel frame filled lightsteel keel, semi-rigid steel frame filled light steel keel and the semi-rigid steel. Byapplying low reciprocating horizontal cyclic loading, test process of deformation anddamage characteristics of light steel keel are observed; Light steel keel braced wallfailure process and failure mode are analyzed; Bearing capacity, displacement of thespecimens and hysteretic curve and deformation pattern are compared.(2) Destruction of light steel keel braced mode are analyzed, and according to themechanical characteristics of the light steel keel braced wall and the boundaryconditions, the various factors influencing the performances of light steel keel bracedwall stress are analyzed, including light steel keel partition internals of the connectedcomponent and form, light steel keel to strengthen the node processing, light steel keel braced wall is equipped with skin, etc.(3) Models which are equipped with skin are suffered relevant assumptions andforce analysis according to the literature. The calculation formula of bearing capacityby the control of the nail is deduced.Based on analysis of the conclusion is as follows:(1) The presence of light steel keel increases the partition wall of the lateralbearing capacity, increases its initial stiffness, and enhanced the hysteretic propertiesof the structure.(2) Strengthen to somehow the keel nodes to improve the bearing capacity of thestructure is not very obvious, but can effectively improve the ductility of structure andhysteretic performance.(3) The semi-rigid node contributes to resist lateral force for the whole structure.The ductility of the semi-rigid nodes has stronger, and it can avoid brittlenessstructure under horizontal reciprocating load damage. It can keep nodes aftercomponent to resist lateral force failure of integrity.(4) The existence of light steel keel braced wall skin enhances the wholestructure of the lateral force resistance, and obviously improves the bearing capacityof the structure and lateral stiffness.(5) A simplified calculation formula and decisive about composite wall shearbearing capacity and nail shear bearing capacity of is derived on the basis ofpredecessors’ research paper.
Keywords/Search Tags:Steel frame, Semi-rigid connection, Light steel keel, Skin effect, Hysteretic performance, Shear capacity
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