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Elastic Plastic Analysis of Seismic Performances of the Special Shaped Reinforced Concrete Column Frame Structure

Author: HeZhenJin
Tutor: ZuoYueMei
School: Xi'an University of Science and Technology
Course: Structural Engineering
Keywords: Reinforced concrete Special-shaped columns Frame structure Finite Element Method Modal Analysis Response spectrum analysis Dynamic analysis
CLC: TU375.4
Type: Master's thesis
Year: 2005
Downloads: 171
Quote: 4
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Abstract


Special-shaped column frame structure is a new type of structural system developed on the basis of the framework structure system, side column using the T-shaped, corner posts, L-shaped, crisscross section column instead of the traditional rectangular column section; at home and abroad profiled the column members research more lack of complete system, but also on the overall seismic performance of special-shaped column frame structure; study the seismic performance of the overall framework of the special-shaped columns, has important theoretical significance and value of engineering applications. Shaped column frame modal analysis, response spectrum analysis, dynamic analysis, analysis of limb length and limb width ratio of the weight of the column of the structural layers, the stiffness of the column, layer structure frequency, and corresponding formula is obtained; enter the structure at the same time in different directions seismic response spectrum analysis of seismic performance changes, to study the structure of the layer between deformation, seismic force, the plastic deformation of the components, the main stress distribution; followed by study damping ratio on the seismic performance; Finally, through the power process analysis, the maximum displacement response of the structure, story drift and seismic reaction force, and the calculated results and the response spectrum calculated results were analyzed, too some design recommendations: ① structure frequency with the structure layers and reduce the frequency of special-shaped column frame structure than conventional rectangular column frame, according to the cycle of the rectangular column frame structure for the special-shaped column frame cycle formula multiplied by small 1 correction factor α, the size of the α values ??need to be further in-depth study; (2) due to the complexity of the corner posts force, corner posts should be full-length encryption torsion stirrups corner posts reinforcement ratio should be greater than the other column, while the special-shaped columns node structural measures should be strengthened; ③ from special-shaped column frame cracks distribution, making the design of engineering structures, in line with regulatory requirements meet the spacing of the conditions under should try using a smaller diameter reinforced to reduce the development of cracks; (4) from the stress distribution, the floors at the easy formation of stress concentration, such as limb length and limb width ratio is large, special-shaped column section corner of stress, and the uneven distribution prone to warping phenomenon warp on the corner posts maximum. ⑸ shaped column frame due to the complexity of the force, as well as the cross-sectional form, to cope with the special-shaped column frame structure shaped column frame seismic design, dynamic time-history supplement calculation. The research method is reliable, concluded force theoretical study of the performance of special-shaped column frame has a certain reference value has guiding significance for the engineering practice.

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CLC: > Industrial Technology > Building Science > Building structure > Concrete structure,reinforced concrete structure > Reinforced concrete structures > Frame
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