Numerical Study on the Seismic Performance of a Demountable Friction-Damped Beam-to-Column Connection for Precast Concrete Moment-Resisting Frames
Bibliographic record
Abstract
To enhance the sustainability and resilience of precast concrete structures, this study adopts a Design for Disassembly (DfD) approach to develop a damage-controlled connection that enables post-earthquake repair and structural component reuse.A Demountable Frictional Energy-Dissipative Beam-to-Column Connection (DFED-BCC) is proposed as a friction-based solution for precast beam-to-column assemblies.The DFED-BCC incorporates a friction damper at the beam end and employs high-strength bolts and angle steel to provide moment resistance, while corbels and shear bolts are designed to transfer shear forces.The connection features a clear load transfer path and a straightforward assembly process.Under cyclic loading, the response initiates with elastic and minor inelastic deformation in the angle steel, resulting in limited energy dissipation and small residual displacements.As displacement increases, frictional sliding occurs, significantly enhancing energy dissipation while localizing damage within demountable components, thereby protecting the concrete elements and embedded reinforcement.At large displacements, prying action induces plastic deformation in the bolts, leading to irreversible damage.The slot length can be adjusted to control behavioral transitions, providing a means to optimize seismic performance.Finite element analysis (FEA) was conducted to evaluate the seismic behavior of the proposed connection, focusing on initial stiffness, stiffness degradation, and energy dissipation, while examining the influence of bolt preloads and material properties.The results were compared with those of a monolithic connection.Findings indicated that bolt preloading significantly affects the mechanical response, with the proposed connection exhibiting superior performance, particularly in terms of energy dissipation.At an equivalent design load, the energy dissipation of the monolithic connection was only 39.72% of that of the DFED-BCC.In conclusion, the DFED-BCC provides a constructible, demountable, and seismically resilient alternative to conventional precast beam-to-column connections.Its ability to simplify II construction, enable post-earthquake repair, and facilitate component reuse highlights its potential for advancing the sustainability and resilience of precast concrete systems.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.002 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.005 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".