摘要
通过对3个足尺性能增强再生混凝土(EC-RAC)框架中节点进行低周反复加载试验,分析其结构模型地震损伤演化过程,确定其震后实际损伤状态与损伤指标。同时,针对传统钢筋混凝土Park-Ang双参数损伤模型无法准确描述加载位移大于100mm后EC-RAC框架节点模型的损伤演化与累积行为的缺点,本文提出了一种修正的Park-Ang双参数损伤模型,并基于前述试验结果,拟合了纤维项系数、位移项系数、能量项系数。最后,利用所提出的损伤模型,以HF-RAC2为例进行损伤指标误差分析,结果表明:平均误差在6%以内,即所提出的双参数损伤模型能够适用于EC-RAC框架节点地震损伤与评估分析。
Three full-featured reinforced interior joints of enhanced recycled aggregate concrete(EC-RAC) frame were considered in the low-cyclic loading test. The evolution process of seismic damage was studied, in which actual damage state and damage index were also determined. Meanwhile, a modified Park-Ang dual-parameter damage model was proposed, since the traditional model could not accurately describe the damage evolution and cumulative behavior of the EC-RAC frame joints after loading displacement greater than 100 mm. The coefficients of fiber term, displacement term and energy term were fitted based on the above test results. Finally, taking HF-RAC2 as an example, the error of the damage index was analyzed based on the developed model. The results show that the average error is within 6%, which means the damage model can be applied to the EC-RAC frame joints for seismic damage and evaluation analysis.
作者
樊禹江
余滨杉
鲁元龙
吴强峰
孙克清
FAN Yu-jiang;YU Bin-shan;LU Yuan-long;WU Qiang-feng;SUN Ke-qing(Chang'an University,School of Architecture,Xi'an 710061,Shannxi,China;Northwestern Polytechnical University School of Mechanics,Civil Engineering and Architecture,Xi'an 710072,Shannxi,China;Xi'an University of Architecture and Technology,School of Civil Engineering,Xi'an 710065,Shannxi,China)
出处
《实验力学》
CSCD
北大核心
2020年第1期159-166,共8页
Journal of Experimental Mechanics
基金
国家自然科学青年基金(51808046)
陕西省自然科学青年基金(2017JQ5061)
中央高校基金科研业务费(310841171001)
陕西省博士后基金(SX2014120057)
