Performance-based aseismic design method for hybrid connection prefabricated pier

Through the performance-based seismic design method, combined with the lateral deformation analysis model and the machine learning prediction model, the structural design parameters of prefabricated assembled bridge piers are adjusted, and the problem of insufficient seismic performance of bridge piers in medium and high intensity areas is solved, and the stability and easy repair of the bridge piers are achieved.

CN119740295AActive Publication Date: 2025-04-01HEBEI XIONGAN RAILWAY EXPRESS LINE CO LTD +1
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Patent Information

Application Number
CN202411819326.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-11
Publication Date
2025-04-01
Estimated Expiration
2044-12-11

AI Technical Summary

Technical Problem

The seismic resistance of existing prefabricated assembled bridge piers in medium and high intensity zones is difficult to meet the design requirements, especially in the hybrid connection mode. Inadequate lateral constraints lead to excessive residual displacement after earthquake, making it difficult to achieve structural stability and easy repairability.

Method used

The performance-based seismic design method is adopted, by establishing a lateral deformation analysis model, calculating yield displacement and displacement ductility coefficients, using machine learning prediction models to predict the maximum displacement and residual displacement, and adjusting structural design parameters based on the prediction results until the target performance indicators are met.

Benefits of technology

The seismic resistance performance of the prefabricated prefabricated bridge piers is realized in the medium and high intensity zone, ensuring that the bridge piers have the advantages of stable structural performance after strong earthquakes and easy to repair after earthquakes.

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Abstract

The invention provides a performance-based aseismic design method for a hybrid connection prefabricated assembled pier, and relates to the technical field of aseismic design of assembled piers, the method comprises the following steps: determining initial design parameters, expected structural performance indexes (including target maximum displacement and target residual displacement) and structural design parameters of the pier; establishing a lateral deformation analysis model, calculating target equivalent single-degree-of-freedom restoring force model parameters based on the lateral deformation analysis model, predicting the maximum displacement and residual displacement of the pier under the actual earthquake action by using a preset machine learning prediction model, and adjusting the structural design parameters of the hybrid connection prefabricated pier according to the prediction result. And calculating the design force and the design bending moment of the pier until related requirements are met. By means of the method, the mixed connection prefabricated assembly type pier suitable for the medium-high intensity area is obtained, and the pier has the advantages of being stable in structural performance, capable of being recovered after an earthquake and easy to repair.
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