Structural Engineering

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Browsing Structural Engineering by Author "Abayneh, Abnet"

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    A Case Study of Space Frame Member's Deflection at the Addis Ababa International Airport
    (Addis Ababa University, 2010-09) Abayneh, Abnet; Taye, Shifferaw (PhD)
    Space frame structures are nowadays widely used in large span and short span structures. The case of assembly and simplicity has made such structures popular particularly in public buildings, including airports. Addis Ababa International Airport Ethiopia Passengers Terminal is one of such building in Ethiopia. Despite their simplicity however, space frame structure have been noted to exhibit failure. Some of the failure of space frame traced back to inaccuracy in assembling, design and material property. This thesis is concerned with the deflection analysis of Addis Ababa International Airport Ethiopia Passengers Terminal. The method of assembly or erection of AAIAEPT depends on space frame behavior of load transmission and construction details. Scale of the structure, method of jointing, strength and rigidity are the objective function of deflection problems. The module dimension, depth and jointing system have been taken as design variables. Laboratorial research is not performed on the material property of member. Deflection analysis has been carried out on geometrical and material non-linearity. Factors influence load carrying capacity, data for analysis and confirmation of theoretical values have been calculated. Using this data redesigning has been made. The relationships between temperature and deflection are presented graphically to show the performance of the structure. The analysis results are found to be in agreement with some of the approximate analysis models except joint rigidity and temperature. The carrying capacity of AAIAEPT space frame is on the safe or conservative side. Finally, propose possible procedures that will help to stop further deformation and provide recommendation on certain precaution to be taken during space frame design and construction. Provide proposals as curative measures to be taken based on the findings.