|Table of Contents|

Study on Seismic Damage Model of Square Steel Tubular Reactive Powder Concrete Columns(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2022年03期
Page:
165-172
Research Field:
Publishing date:

Info

Title:
Study on Seismic Damage Model of Square Steel Tubular Reactive Powder Concrete Columns
Author(s):
HAO Wen-xiu;  WEI Xing-na;  XU Xiao;  YU Wan-li
(School of Urban and Rural Construction, Hebei Agricultural University, Baoding 071001, Hebei, China)
Keywords:
square steel tube;  reactive powder concrete column;  seismic damage model;  seismic performance
PACS:
TU398.9
DOI:
10.19815/j.jace.2021.07044
Abstract:
In order to study the seismic performance and seismic damage model of reactive powder concrete(RPC)filled square steel tubular columns under horizontal low cyclic loading, 125 models of square steel tubular RPC columns with different parameters(steel ratio, axial compression ratio and slenderness ratio)were established by ABAQUS finite element software, and the hysteresis curve, skeleton curve, ductility and energy dissipation capacity were analyzed. Referring to Park damage model and Fu effective energy consumption hypothesis, a two-parameter damage model based on deformation and effective cumulative hysteresis energy consumption was proposed, and the damage parameters α=0.851 and β=-0.508 were obtained by nonlinear fitting. The study results show that the shapes of the hysteresis curves are regular and full, indicating that the square steel tubular RPC columns has good deformation capacities and energy dissipation capacities. The finite element analysis results are in good agreement with the experimental results, verifying the correctness of the establishment of the square steel tubular RPC column models. According to the results of deformation and effective cumulative hysteresis energy consumption of square steel tubular RPC columns, the damage variable D value calculated by damage model is close to 1. The final failure mode of the specimen and its damage variable D value are basically consistent with the damage phenomenon and its corresponding damage variable D value in the seismic damage level specified in Classification of Earthquake Damage to Buildings and Special Structures(GB/T 24335—2009)in the damage assessment, indicating that the damage model can better reflect the seismic damage state of square steel tubular RPC column.

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Last Update: 2022-05-30