Seismic Sensitivity Optimization Method of Structure Based on Interstory Displacement Angle Constraint

Abstract

The invention relates to a structure seismic sensitivity optimization method based on story drift angle constraint. The method includes the steps that 1, lateral load resisting members are set into multiple optimization groups; 2, modal analysis is conducted, the number of modes of vibration needing to be considered is determined and analyzed, and all orders of modal amplitude are calculated; 3, response spectrum analysis is conducted, and a maximum story drift angle and a modal story drift angle on the same layer are obtained; 4, virtual unit horizontal force is applied to all floors and defined as a working condition 1 to a working condition M (M is the sum of the floors), and virtual unit torque is applied to the layer where the story drift angle is maximum and defined as a working condition M+1; 5, the sensitivity coefficients of the sizes or material cost of all the members to the maximum story drift angle are calculated; 6, all the optimization groups are subjected to size weighted averaging, and the sensitivity coefficients of all the optimization groups to the maximum story drift angle are obtained; 7, the sizes of all the members in the optimization groups with the large sensitivity coefficients are increased, and the sizes of all the members with the small sensitivity coefficients are reduced. Compared with the prior art, the method has the advantages of reducing cost and the like.

Description

technical field [0001] The invention relates to the technical field of structural engineering, in particular to a structural seismic sensitivity optimization method based on interstory displacement angle constraints. Background technique [0002] Due to the demand for saving land in urban construction, the development of high-strength and lightweight materials, the improvement of design and construction technology, and people's desire for super-high landmark buildings, more and more super high-rise buildings appear. The structure of super high-rise buildings is slender and has the characteristics of high and flexible. Due to the high and flexible overall structure, the design of the main components is usually controlled by stiffness. Under the action of wind load or earthquake, super high-rise buildings need to control excessive deflection or deformation of structures or components to avoid damage to exterior walls and exterior decoration materials caused thereby. At presen...

AI Technical Summary

Problems solved by technology

However, under the response spectrum condition, the sensitivity analysis of component volume and component material cost to the maximum interstory displacement angle is relatively complicated, and it is necessary to consider the combination of seismic action effects

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