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[1] Ma Wenjie, Wang Binglong, Wang Xu, et al. Prediction of a maximum pull-out load of anchor boltsusing an optimal combination model [J]. Journal of Southeast University (English Edition), 2021, 37 (2): 199-208. [doi:10.3969/j.issn.1003-7985.2021.02.010]
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Prediction of a maximum pull-out load of anchor boltsusing an optimal combination model()
基于最优组合模型预测锚杆极限抗拔承载力的方法
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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:
37
Issue:
2021 2
Page:
199-208
Research Field:
Civil Engineering
Publishing date:
2021-06-20

Info

Title:
Prediction of a maximum pull-out load of anchor boltsusing an optimal combination model
基于最优组合模型预测锚杆极限抗拔承载力的方法
Author(s):
Ma Wenjie1;  2;  Wang Binglong1;  2;  Wang Xu3;  Wang Bolin3
1Key Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji University, Shanghai 201804, China
2Shanghai Key Laboratory of Rail Infrastructure Durability and System Safety, Tongji University, Shanghai 201804, China
3School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
马文杰1;  2;  王炳龙1;  2;  王旭3;  王博林3
1同济大学道路与交通工程教育部重点实验室, 上海 201804; 2同济大学上海市轨道交通结构耐久与系统安全重点实验室, 上海 201804; 3兰州交通大学土木工程学院, 兰州 730070
Keywords:
anchor bolt;  maximum pull-out load;  mixed model of improved exponential and power function(MIEPF)model;  unequal interval gray GM(1;  1)model;  optimal combination model
锚杆;  最大抗拔荷载;  改进指-幂混合模型;  不等间距灰色GM(1;  1)模型;  组合预测模型
PACS:
TU433
DOI:
10.3969/j.issn.1003-7985.2021.02.010
Abstract:
The mixed model of improved exponential and power function and unequal interval gray GM(1, 1)model have poor accuracy in predicting the maximum pull-out load of anchor bolts. An optimal combination model was derived using the optimally weighted combination theory and the minimum sum of logarithmic squared errors as the objective function. Two typical anchor bolt pull-out engineering cases were selected to compare the performance of the proposed model with those of existing ones. Results showed that the optimal combination model was suitable not only for the slow P-s curve but also for the steep P-s curve. Its accuracy and stable reliability, as well as its prediction capability classification, were better than those of the other prediction models. Therefore, the optimal combination model is an effective processing method for predicting the maximum pull-out load of anchor bolts according to measured data.
针对改进指-幂混合模型和不等间距灰色GM(1, 1)模型对锚杆极限抗拔承载力预测精度较差的问题, 基于最优加权组合建模理论, 以组合模型的最小对数误差平方和为目标函数求解最优加权系数, 推导出最优加权几何平均组合预测模型, 以提高锚杆极限抗拔承载力预测精度的置信度.选取2个典型锚杆拉拔工程实例(锚杆P-s曲线分别为缓变型和陡变型)用以验证各预测模型的精度和可靠度.计算结果表明:该组合预测模型不仅适合缓变型曲线, 而且也适合陡变型曲线, 其精度和可靠性均优于其他预测模型, 预测精度等级划分为优秀, 可作为锚杆抗拔承载力实测资料的一种有效分析模型.

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Memo

Memo:
Biographies: Ma Wenjie(1993—), male, Ph.D. candidate; Wang Binglong(corresponding author), male, doctor, professor, wangbl8@163.com.
Foundation item: The National Natural Science Foundation of China(No. 51778485).
Citation: Ma Wenjie, Wang Binglong, Wang Xu, et al. Prediction of a maximum pull-out load of anchor bolts using an optimal combination model[J].Journal of Southeast University(English Edition), 2021, 37(2):199-208.DOI:10.3969/j.issn.1003-7985.2021.02.010.
Last Update: 2021-06-20