Title: Study on Seismic Damage Model of Fly Ash Foam Concrete Wall

Author(s): Yunhong Hao, Hongze Wang, Yupeng Zhao, Chakelehan, Yong Shi

Publication: Structural Journal

Volume:

Issue:

Appears on pages(s):

Keywords: axial compression ratio; damage parameter; fly ash foamed concrete; seismic damage model; shear wall; steel ratio

DOI: 10.14359/51740855

Date: 6/3/2024

Abstract:
Firstly, the proposed static test was carried out on 8 fly ash foam concrete walls with different axial compression ratios μ and steel ratio 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, the energy method and Park-Ang-W, were proposed respectively, 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 ratio ρ. The results show that the damage evaluation index based on crack development theory can effectively reflect the damage of fly ash foam 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 about 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 foam concrete in construction projects.