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摘要
One prefabricated concrete pure frame and two prefabricated concrete frames-cold-formed thin-walled steel composite (CTSC) walls were designed and tested under cyclic loadings to study their seismic behaviors and failure mechanism. The failure modes and load-displacement relationships, stiffness degradation, ductility performance, energy dissipation mechanism and strain variation characteristics of key positions were analyzed comprehensively. In the analysis above, the seismic performance of prefabricated concrete frames was studied in terms of the effect of embedded or external connections of CTSC walls. The results indicate that both the embedded and external connections between prefabricated concrete frame and CTSC wall panels can effectively guarantee the cooperative work of the prefabricated frame and the CTSC panels under earthquakes. Compared with the concrete pure frame, the bearing capacity of frame embedded CTSC wall panels and external CTSC wall panels is respectively increased by 28. 3% and 15. 0%, and the initial stiffness is improved by 38. 4% and 16. 8%, respectively. Based on the principle of equivalent tension-compression bar, a simplified formula of the prefabricated concrete frame embedded CTSC walls was proposed, which could calculate the lateral stiffness. And the accuracy of the calculation results was verified. ? 2023 Science Press.
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