型钢活性粉末混凝土柱耐火极限数值分析

打开文本图片集

中图分类号：TU375.3；TP391.99 文献标志码：B

Numerical analysis on fire resistance of steel-reinforced reactive powder concrete column

ZHOU Yang，ZHENG Xiaohua （College of Civil Engineering，Shandong Jianzhu University，Jinan 25O1O1，China）

Abstract： To study the fire resistance of steel-reinforced reactive powder concrete（SRRPC）columns， the SRRPC columns with diffrent section sizes，eccentricity，stirrup ratio and axial compression ratio is simulated and analyzed by the finite element analysis software Abaqus，and the changes in temperature distribution，axial displacement and fire resistance limit isexplored.The results show that：the temperature of SRRPC columns distributed radially under high temperature；the axial displacement of the component increases slowly in the early stage，but accelerates in the later stage；with the increase of section size and stirrup ratio，the fire resistance limit of the component increases，and the fire resistance limit of the column decreases with the increase of eccentricity and axial compression ratio，and the influence of section size，eccentricity and axial compresson ratio on the fire resistance limit is significantly greater than that of the stirrup ratio.Based on the results of the parameter analysis，the formula of fire resistance limit of the SRRPC column is suggested according to the regression analysis， which can provide a reference for the engineering application of SRRPC structure.

Key words： steel-reinforced reactive powder concrete；fire resistance limit； parameter analysis ；regression analysis； finite element

0引言

型钢活性粉末混凝土（steel-reinforcedreactivepowderconcrete，SRRPC）结构是一种新型组合结构，其既具有活性粉末混凝土强度高和体积稳定的特点，又具有型钢混凝土的延性和韧性。（剩余9338字）