Details
| Original language | English |
|---|---|
| Pages (from-to) | 74-80 |
| Number of pages | 7 |
| Journal | Engineering Structures |
| Volume | 98 |
| Early online date | 27 Apr 2015 |
| Publication status | Published - 1 Sept 2015 |
| Externally published | Yes |
Abstract
Based on the accordant capacity models in American and Chinese design codes, a nonlinear failure function of reinforced concrete (RC) frame columns with tension failure is built under combined vertical and horizontal loads. Then, we identify that the interaction curve of ultimate vertical and horizontal loads shows special characteristics; it is a nonlinear curve with some positive correlation parts, which is largely different from the case of a simple linear failure function as adopted in codes. The ratio of the positive correlation part to the whole curve is also studied. Subsequently, a practical nonlinear failure function model is built with the series expansion technique. Numerical simulation proves that the proposed model can be used to obtain an accurate reliability result, an effective prediction of reliability variation and also a convenient prediction of low reliability cases. The results based on this model indicate that there is a strong difference in the reliability of RC columns designed with the same safety factor but with different design parameters, and the reliability would be lower when the eccentricity produced by vertical load is smaller.
Keywords
- Horizontal loads, Nonlinear failure function, RC frame columns with tension failure, Reliability, Series expansion, Vertical loads
ASJC Scopus subject areas
- Engineering(all)
- Civil and Structural Engineering
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In: Engineering Structures, Vol. 98, 01.09.2015, p. 74-80.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - A nonlinear model of failure function for reliability analysis of RC frame columns with tension failure
AU - Jiang, Youbao
AU - Sun, Guoheng
AU - He, Yihua
AU - Beer, Michael
AU - Zhang, Jianren
N1 - Funding Information: The research is supported by the National Key Basic Research Program of China (Grant No. 2015CB057705 ), China Scholarship Council (Grant No. 201308430311 ) and National Natural Science Foundation of China (Grant No. 11102029 ). This support is gratefully acknowledged.
PY - 2015/9/1
Y1 - 2015/9/1
N2 - Based on the accordant capacity models in American and Chinese design codes, a nonlinear failure function of reinforced concrete (RC) frame columns with tension failure is built under combined vertical and horizontal loads. Then, we identify that the interaction curve of ultimate vertical and horizontal loads shows special characteristics; it is a nonlinear curve with some positive correlation parts, which is largely different from the case of a simple linear failure function as adopted in codes. The ratio of the positive correlation part to the whole curve is also studied. Subsequently, a practical nonlinear failure function model is built with the series expansion technique. Numerical simulation proves that the proposed model can be used to obtain an accurate reliability result, an effective prediction of reliability variation and also a convenient prediction of low reliability cases. The results based on this model indicate that there is a strong difference in the reliability of RC columns designed with the same safety factor but with different design parameters, and the reliability would be lower when the eccentricity produced by vertical load is smaller.
AB - Based on the accordant capacity models in American and Chinese design codes, a nonlinear failure function of reinforced concrete (RC) frame columns with tension failure is built under combined vertical and horizontal loads. Then, we identify that the interaction curve of ultimate vertical and horizontal loads shows special characteristics; it is a nonlinear curve with some positive correlation parts, which is largely different from the case of a simple linear failure function as adopted in codes. The ratio of the positive correlation part to the whole curve is also studied. Subsequently, a practical nonlinear failure function model is built with the series expansion technique. Numerical simulation proves that the proposed model can be used to obtain an accurate reliability result, an effective prediction of reliability variation and also a convenient prediction of low reliability cases. The results based on this model indicate that there is a strong difference in the reliability of RC columns designed with the same safety factor but with different design parameters, and the reliability would be lower when the eccentricity produced by vertical load is smaller.
KW - Horizontal loads
KW - Nonlinear failure function
KW - RC frame columns with tension failure
KW - Reliability
KW - Series expansion
KW - Vertical loads
UR - http://www.scopus.com/inward/record.url?scp=84938513245&partnerID=8YFLogxK
U2 - 10.1016/j.engstruct.2015.04.030
DO - 10.1016/j.engstruct.2015.04.030
M3 - Article
AN - SCOPUS:84938513245
VL - 98
SP - 74
EP - 80
JO - Engineering Structures
JF - Engineering Structures
SN - 0141-0296
ER -