Influence Analysis And Processing Of Reinforced Concrete Transfer Truss With Deviated Inclined Abdomen Stem

In recent years, settings conversion layers in high-rise building has become a trend of the modern architectur, and the beam-type conversion structure is the most commonly structure to achieve vertical conversion.In the beam-type conversion structure which support vertical members,when the span of the transfer beam is very large and supporting many layers,the vertical load passed down will be very big,so produce a big section size which against to the full use of the architectural space. So adopt a truss conversion layer can solve this problem cleverly.Baseed on the summarization of both at home and abroad achievements of the conversion buildings, this thesis focus on the deviation problem in construction process with open-web truss conversion layer.Firstly,the thesis elaborates the different types of conversion layers in high-rise buildings and their advatages and disadvantages,also the engineering application and some problems with the open-web truss transfer layer structrue.Secondly,the thesis summarized the principle of finite element analysis and made a detailed analysis and discussion of element choice, material constitutive relation,failure criteria,convergence criteria for finite element analysis.Thirdly,the thesis summarized the nonliner finite element theory,especially for unit selection,material constitutive relation,failure criteria,convergence criteria in masonry structure finite element anslysis.Then,the thesis analysis the mechanical characteristics of open-web truss and puts forward reasonable structure form of conversion truss.After analysis the stress characteristics of the oblique abdomen stem emerged deviation,the thesis puts forward the computation method of combining stem department finite element model and plane stress finite element model.Then analysis the open-web truss emerged deviation to guide the solution of practical engineering deviated oblique abdomen stem problem.This thesis focuses on the influence of deviated oblique abdomen stem in stem department model and ANSYS model.Through choosing a practical engineering open-web truss with a deviated oblique abdomen stem to establish a stem department model and a ANSYS model,then respectively analysis the conversion truss with three kinds of supports with both deviated and not deviated oblique abdomen stem.After compare the calculated results and make a conclusion,generalise this analysis and calculation method to other truss and provide references to other such projuects.