Title:
Study on Seismic Damage Model of Fly Ash Foamed Concrete Wall
Author(s):
Yunhong Hao, Hongze Wang, Yupeng Zhao, Chakelehan, and Yong Shi
Publication:
Structural Journal
Volume:
121
Issue:
5
Appears on pages(s):
89-98
Keywords:
axial compression ratio; damage parameter; fly ash foamed concrete; seismic damage model; shear wall; steel ratio.
DOI:
10.14359/51740855
Date:
9/1/2024
Abstract:
Firstly, the proposed static test was carried out on eight fly ash
foamed concrete walls with different axial compression ratios μ
and steel ratios ρ. Secondly, the quantitative analysis method of
wall damage was proposed based on the crack development theory,
and the real damage index was proposed. Then, through theoretical
analysis and curve fitting, two kinds of seismic damage models—
energy method and Park-Ang-W—were proposed, and the damage
values were calculated to compare with the real damage values.
Finally, the Park-Ang-W model was used to analyze the parameter
expansion of 16 Abaqus wall models with different axial compression ratios μ and steel ratios ρ. The results show that the damage evaluation index based on crack development theory can effectively reflect the damage of fly ash foamed concrete walls. The accuracy of the energy method model is not high at the low number of cycles, and the error is less than 20% at the high number of cycles. The Park-Ang-W model has an error of approximately 10% at a high number of cycles, which better reflects the true damage of the specimen. The axial compression ratio μ has little effect on the wall
damage, with a maximum effect range of 6.7%. Increasing the
reinforcement ratio can effectively reduce the wall damage, with
a maximum effect range of 12.6%. The results of the study provide
a theoretical basis for the future application of fly ash foamed
concrete in construction projects.