신뢰도 기반 활하중모델에 의한 강합성 사장교의 충격계수 평가 (Evaluation of Impact Factor in Composite Cable-Stayed Bridges under Reliability-based Live Load Model)
| Author(s): |
Jae Bong Park
Yong Myung Park Dong Hyun Kim Jong Han Lee |
|---|---|
| Medium: | journal article |
| Language(s): | Korean |
| Published in: | Journal of Korean Society of Steel Construction (한국강구조학회 논문집), August 2013, n. 4, v. 25 |
| Page(s): | 335-346 |
| DOI: | 10.7781/kjoss.2013.25.4.335 |
| Abstract: | AASHTO LRFD and Korean Bridge Design Code (Limit State Design) specify to consider Truck and Lane load simultaneously determined from reliability-based live load model, and impact shall be applied to the truck load while it shall not be applied to the lane load. In this paper, vehicle-bridge interaction analysis under moving truck and lane loads were performed to estimate impact factor of the cables and girders for the selected multi-cable-stayed composite bridges with 230m, 400m and 540m main span. A 6-d.o.f. vehicle was used for truck load and a series of single-axle vehicles was applied to simulate equivalent lane load. The effect of damping ratio on the impact factor was estimated and then the essential parameters to impact factor, i.e., road surface roughness and vehicle speed were considered. The road surface roughness was randomly generated based on ISO 8608 and it was applied to the truck load only in the vehicle-bridge interaction analysis. The impact factors evaluated from dynamic interaction analysis were also compared with those by the influence line method that is currently used in design practice to estimate impact factor in cable-stayed bridge. |
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10326434 - Published on:
19/11/2019 - Last updated on:
19/11/2019
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