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樊禹江*,余滨杉,鲁元龙,吴强峰,孙克清.修正的Park-Ang性能增强再生混凝土框架中节点地震损伤模型[J].实验力学,2020,35(1):159~166
修正的Park-Ang性能增强再生混凝土框架中节点地震损伤模型
Study on Modified Park-Ang seismic damage model for interior joints of enhanced recycled aggregate concrete frame
投稿时间:2018-06-17  修订日期:2018-09-14
DOI:10.7520/1001-4888-18-146
中文关键词:  性能增强再生混凝土(EC-RAC)  框架中节点  损伤模型  误差分析
英文关键词:enhanced recycled aggregate concrete(EC-RAC)  frame interior joint  damage model  error analysis
基金项目: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)
作者单位
樊禹江* 长安大学 建筑学院, 陕西西安 710061 
余滨杉 西北工业大学 力学与土木建筑学院, 陕西西安 710072 
鲁元龙 西安建筑科技大学 土木工程学院, 陕西西安 710065 
吴强峰 西安建筑科技大学 土木工程学院, 陕西西安 710065 
孙克清 长安大学 建筑学院, 陕西西安 710061 
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中文摘要:
      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。
英文摘要:
      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 100mm. 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.
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