Anti-seismic performance simulation test method and system for concrete-filled steel tube structure

By employing a unified parametric finite element modeling, characteristic buckling mode tracking, and a coupling mechanism between local buckling and concrete crushing damage indices, combined with energy ratio-driven adaptive value stability control, the numerical solution stability and damage identification problems of steel-concrete composite structures under strong earthquakes were solved, achieving efficient and accurate seismic performance simulation.

CN121980877APending Publication Date: 2026-05-05QITAI COUNTY JIUHE WATER CONSERVANCY DEVELOPMENT INVESTMENT CO LTD
8 Cites 4 Cited by

Patent Information

Application Number
CN202610220816.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-02-24
Publication Date
2026-05-05

AI Technical Summary

Technical Problem

Existing technologies for simulating the strong seismic response of steel-concrete composite structures suffer from several problems: Newton iteration solutions are prone to divergence and have difficulty converging; they are also difficult to accurately identify buckling and crushing coupled instability; and computational efficiency and stability are difficult to balance.

Method used

A unified parametric finite element modeling, characteristic buckling mode tracking, and coupling mechanism of local buckling and concrete crushing damage index are adopted, combined with energy ratio-driven adaptive value stabilization control, to construct a set of stable parameters and perform nonlinear time history iterative solution for strong earthquakes.

Benefits of technology

Numerical stability control was achieved during the synergistic development stage of local buckling of the steel tube and crushing of the core concrete, which improved the accuracy of failure prediction and the stability of calculation, and enhanced the precision and reliability of seismic performance simulation.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention relates to the technical field of computer-aided anti-seismic analysis, and discloses an anti-seismic performance simulation test method and system for a concrete-filled steel tube structure, and the method comprises the steps: obtaining a parameter set of the concrete-filled steel tube structure; identifying a critical buckling mode and constructing a defect correction model; constructing a coupling damage index; constructing a numerical instability risk evaluation value based on the structure energy proportion; carrying out strong earthquake nonlinear time-history iterative solution; and outputting the anti-seismic performance index set and the coupling failure area. Compared with the prior art, the technical problem that Newton iteration divergence is prone to occurring in numerical solution under the coupling instability condition that traditional nonlinear finite element analysis is relied on for strong earthquake response calculation, especially when a steel pipe is subjected to local buckling and core concrete enters a high-pressure three-axis stress state is solved. Due to the fact that the local buckling and crushing damage coupling index and the self-adaptive time step length adjusting mechanism are constructed, the stability of the anti-seismic performance simulation result of the concrete-filled steel tube structure under the strong earthquake effect is improved.
Need to check novelty before this filing date? Find Prior Art