Influence of long-term load and chlorine corrosion on reinforced concrete beam deflection

被引：0
|
作者：
He S. [1 ]
Cao Z. [1 ]
Liu W. [2 ]
Li P. [3 ]
机构：
[1] School of Civil Engineering, North China University of Technology, Beijing
[2] Beijing Fayan Engineering Technology Co., Ltd., Beijing
[3] School of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing
来源：
Qinghua Daxue Xuebao/Journal of Tsinghua University | 2019年 / 59卷 / 11期
关键词：
ACI209R prediction model; Chloride environment; Coupling effect; Long-term deflection; Long-term load; Reinforced concrete beams;
D O I：
10.16511/j.cnki.qhdxxb.2019.26.022
中图分类号：
学科分类号：
摘要：
This study predicts the long-term deformation of reinforced concrete (RC) beams in corrosive environments which is important for ensuring the long-term strength and durability of structures. The long-term deformation of RC beams was measured for the coupling action of the load level and chloride corrosion environment. The long-term deflection of the beams was compared with predictions of the ACI209R model. The results show that the beam deflection when affected by load-chloride corrosion can be divided into four stages: the deflection increased rapidly in the first 10 d, the growth rate slowed after 10 d, the growth rate further decreased after 150 d, and the deflection rate started to increase again after 300 d. Alternating dry and wet environments caused the deflection rates to go up and down. The load level has an evident influence on the RC beam deflection in the corrosive environment. The ACI209R prediction model does not accurately predict the test results because it does not consider the coupled effect of the reinforcement corrosion. © 2019, Tsinghua University Press. All right reserved.
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页码：902 / 909
页数：7
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