Dynamic Amplification of Tied-Arch Girder due to Variations of Rise Ratio and Vehicle Moving Speed

• DOI: 10.9798/kosham.2014.14.5.49
• Publication Date: 2014-11-28T16:08:44Z
• Authors: Sanghyun Hong; Jong Seh Lee; Kyung-Hoon Park; Hwasung Roh
• Keywords: 02 engineering and technology; 7. Clean energy; 0201 civil engineering

In this paper the effect of rise ratio on the dynamic amplification (DA) of the tied-arch girder is investigated through a finite element analysis. Equivalent nodal loads are considered for the modeling of moving vehicle loads, and several vehicle speeds ranged between 60 km/hr and 120 km/hr are applied for the DA investigation. For detailed investigation, the relationship between the first mode frequency of the girder and the DA at the middle of the girder is investigated. The results show that the DA of the girder sensitively varies according to the rise ratio; especially when the rise ratio is more than 0.03, the maximum DA is relatively larger than the cases of the smaller rise ratio. Such result is appeared since the girder becomes more flexible and the developing time of the maximum DA is close to the first natural period of the girder.