Shixiang Xiao, Xin Bu, Bing Shen, Lidan Fan, Yifei Chen, Xinwu Wang
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Seismic performance and damage characteristics evolution of spatial beam to corner column connection with T-stubs
This study systematically investigates the seismic performance and damage mechanisms of spatial corner column joints with T-stubs using integrated experimental, numerical, and theoretical approaches. Two spatial joint specimens were designed with distinct T-stubs configurations to evaluate their influence on seismic behavior and damage characteristics, followed by quasi-static tests. Experimental results indicate that the thickness of T-stub significantly influences seismic performance, with plastic hinges predominantly forming at the web-flange junctions of T-stub, where distinct plastic strain patterns are observed. Parametric finite element models were developed to analyze the effects of flange and web thickness on joint seismic performance and damage progression, confirming that thicker web-flange T-stub designs enhance seismic capacity. A theoretical calculation model based on component method principles accurately predicts initial rotational stiffness in both major-axis and minor-axis in-planes, showing excellent agreement with experimental data. Additionally, a comprehensive evaluation of six damage index models validates their effectiveness in predicting damage accumulation and failure patterns, providing theoretical support for engineering applications.
期刊介绍:
The Journal of Building Engineering is an interdisciplinary journal that covers all aspects of science and technology concerned with the whole life cycle of the built environment; from the design phase through to construction, operation, performance, maintenance and its deterioration.