Wu T.-L.,Engineering and Construction Co. |
Ou Y.-C.,National Taiwan University of Science and Technology |
Yen-Liang Yin S.,Ruentex Group |
Wang J.-C.,Engineering and Construction Co. |
And 2 more authors.
Journal of the Chinese Institute of Engineers, Transactions of the Chinese Institute of Engineers,Series A/Chung-kuo Kung Ch'eng Hsuch K'an | Year: 2013
This study investigates the behavior of transversely reinforced oblong and rectangular bridge columns under combined axial and flexural loading, including eccentric compression and lateral cyclic loading under constant axial load. The transverse reinforcement schemes include conventional tie and multi-spiral reinforcement. The multi-spiral reinforcement for the oblong column comprises two interlocking spirals and, for rectangular columns, comprises two interlocking large central spirals interlocked with four small spirals at the corners. The amount of transverse reinforcement for all of the columns conforms to the current seismic bridge design specifications. Test results indicate that all of the columns exhibit ductile behavior with ductility capacities significantly higher than the ductility capacity required by the design code. The oblong spiral column with an amount of transverse reinforcement 43% that of the corresponding tied column shows strength, ductility, energy dissipation, and over-strength similar to the tied column. Additionally, the rectangular spiral column with an amount of transverse reinforcement 59% that of the corresponding tied column exhibits strength, ductility, energy dissipation and over-strength superior to the tied column. Moreover, the code P-M interaction analysis method can provide a conservative means of estimating nominal moment strength. The two code methods to determine the maximum probable moment strengths may not provide conservative estimates. Results of this study demonstrate that the maximum probable moment of the columns examined can be estimated conservatively as 1.4 times the nominal moment strength. © 2013 The Chinese Institute of Engineers.
Xu Y.F.,Engineering and Construction Co.
Advanced Materials Research | Year: 2014
The structural stress analysis of concrete chimney is the basic security to ensure the safe operation. The Simulation analysis of fine modeling based on large finite element method can make the calculating result more real and reliable. Combined with some chimney project, the fine structural model is established, and stress and internal force’s distribution in different load conditions is analyzed in this paper, and results show that the condition of the worst internal forces should be chosed according to the calculation object. The analysis method based on the finite element can be a reference for other similar chimney. © (2014) Trans Tech Publications, Switzerland.