Structural raft polyurethane vibration isolation optimization design method based on uneven distribution of bearing capacity

Abstract

The invention provides a structural raft polyurethane vibration isolation optimization design method based on uneven distribution of bearing capacity, and the method is characterized in that the method comprises the following steps: (a) determining a preliminary design scheme of a polyurethane vibration isolation layer according to a design scheme of a building structure; (b) utilizing a finite element analysis method to carry out structure raft bearing capacity fine calculation on the building structure, including raft deformation rigidity calculation under block column nodes; (c) determining the thickness of the urethane vibration isolation layer of each block area according to the calculation result of the step (b); and (d) further optimizing the preliminary design scheme in the step (a) based on the thickness determined in the step (c), so that the preliminary design scheme meets the vibration isolation requirement. Based on the principle of uneven distribution of bearing capacity of a building structure, the size, thickness and layout of the polyurethane vibration isolation pad are optimized and adjusted by considering the consistent condition of vertical deformation of raft construction, so that the vibration isolation measures of the building are more economical and reasonable.

Description

technical field [0001] The invention belongs to the technical field of vibration control of building structures, and in particular relates to a structural raft polyurethane vibration isolation optimization design method based on uneven distribution of bearing capacity. Background technique [0002] At present, in actual engineering, when the raft foundation is used for the superstructure of the subway, polyurethane vibration isolation pads are often used. When using this method, most of them rely on experience to adopt uniform polyurethane thickness layout, but the bearing capacity distribution of different positions in actual engineering Uneven, and at the same time, most of the polyurethane is too thick, and there is still a lot of waste for vibration reduction, or after using a uniform polyurethane thickness, it will inevitably lead to local locations that cannot meet the anti-vibration requirements due to insufficient polyurethane thickness. Therefore, traditional enginee...

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Problems solved by technology

[0006] Aiming at the problems of performance mismatch and material waste in the current method of lowering the polyurethane vibration isolation pads on the raft foundation to reduce the vibration hazards of the subway superstructure, through optimization calculations, the vibration isolation pads are thickened under the foundation with large force, and the force is small The thickness of the vibration isolation pad is reduced on the basis of the same thickness, which avoids the problem of large economic losses caused by all polyurethane vibration isolation pads of the same thickness, and improves the economy of this method.

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