TY  - EJOU
AU  - Yue, Hongtao 
AU  - Yu, Xiang 
AU  - Wang, Chenghu 
AU  - Kou, Xiaona 
AU  - Liu, Zhongyuan 
AU  - Ou, Manli 

TI  - Dynamic Elastoplastic Analysis of a Long-Span Composite Structure Based on Cross-Platform Collaborative Modeling: A Case Study of a University Sports Building
T2  - Structural Durability \& Health Monitoring

PY  - 
VL  - 
IS  - 
SN  - 1930-2991

AB  - Dynamic elastoplastic time history analysis is a critical methodology for evaluating the seismic performance and damage evolution mechanisms of complex long span structures. To address the modeling challenges inherent in hybrid frame space grid systems, this study implemented an efficient collaborative workflow utilizing the data interface between YJK and ABAQUS. A long span sports training building served as the research prototype for systematic multidimensional elastic and elastoplastic dynamic evaluations. The results indicate that under frequent earthquakes, the structure exhibits pronounced sensitivity to broadband excitations, with the artificial wave R1 inducing a maximum elastic inter story drift ratio of 1/605 and a peak base shear of 2442 kN. This response reveals a strong spatial torsional coupling effect triggered by the abrupt stiffness mutation at the corbel-truss interface. Under rare earthquakes, the maximum elastoplastic drift ratio reaches 1/159, remaining significantly below the code mandated collapse limit of 1/50. A hierarchical damage evolution mechanism was elucidated, where localized yielding at 270.7 MPa in the mid span top chords and corbel supports effectively functions as a structural fuse to dissipate seismic energy. Crucially, the maximum compressive strain in the concrete columns is maintained at 0.0019, which mobilizes the ultimate material strength while avoiding the strain softening region. This ensures the stability of the vertical load transfer path and demonstrates high seismic resilience as the structure remains repairable after extreme events. Furthermore, by extracting the three dimensional dynamic ultimate reaction forces, a shear dominated asymmetric loading characteristic was identified at the connection hubs, where the horizontal shear (681 kN) significantly exceeded the vertical reactions. Supplementary performance based verifications for the shear and sliding capacities of the corbels and truss supports were conducted to eliminate the risks of joint failure and roof unseating. The analytical framework of macroscopic overall evaluation, microscopic damage revelation, and critical joint verification established in this study provides a robust theoretical and engineering reference for the seismic design of similar complex spatial structures.
KW  - Collaborative modeling; long span hybrid structure; dynamic elastoplastic analysis; seismic resilience; multidimensional seismic excitation

DO  - 10.32604/sdhm.2026.082850