| 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) |
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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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