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RISS 인기검색어
- 검색키워드
- 저자 : Gaolin Zhufu (검색결과 2 건)
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Mechanical Behavior of Laminated Rubber Isolation Bearing with Buckling Steel Plate
Jianpeng Sun,Gaolin Zhufu 한국강구조학회 2022 International Journal of Steel Structures Vol.22 No.4
To improve the ability of disaster prevention and mitigation of bridges and realize the seismic resilience of traffi c, this paper combines the elastic buckling characteristics of steel plates with the mechanical properties of laminated rubber bearings based on the principle of seismic isolation, and proposes a steel plate-laminated rubber composite seismic isolation bearing. The mechanical properties of steel plates were analyzed by ABAQUS software, and it was found that the shear stiff ness of the steel plates before and after buckling had bilinear characteristics. The stiff ness of the steel plate, the stiff ness ratio before and after buckling, and the critical buckling load decreased with the increase of height-width ratio. According to the numerical regression, the precise formulas of the initial shear stiff ness, the stiff ness ratio before and after buckling, and the critical buckling load of the steel plate are proposed. Finally, by studying the seismic performance parameters of the alternative seismic isolation bearing, such as dissipation energy, shear stiff ness, and equivalent viscous damping coeffi cient, the results show that the outer steel plate of the alternative type of bearing is in parallel with the rubber. The peripheral steel plate improves the overall energy dissipation capacity of the bearing. Under reciprocating load, the bearing exhibits threestage characteristics, which can meet the performance requirements of bridge earthquake prevention and disaster reduction.
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Key Construction Technology and Monitoring of Long-Span Steel Box Tied Arch Bridge
Jianpeng Sun,Jinbin Li,Yingbiao Jiang,Xiaogang Ma,Zihan Tan,Gaolin Zhufu 한국강구조학회 2023 International Journal of Steel Structures Vol.23 No.1
As a composite system bridge, half-through steel box tied arch bridge combines the arch mainly bearing pressure and the beam mainly bearing bending moment, gives full play to their respective advantages, and has the two characteristics of large span capacity of arch bridge and strong adaptability of simply supported beam bridge to foundation. However, in the construction process, due to the complex construction technology and structural stress behavior, the hoisting of arch rib, the tensioning of tie rod and suspender are accompanied by the change of internal load, which is a challenge for bridge construction. Taking the Lancang River Liming Bridge in Xishuangbanna, Yunnan Province as an example, this paper introduces a new construction scheme of arch bridge, introduces the structural characteristics of cable hoisting system, and puts forward the construction monitoring method. The response of arch rib, suspender, tie rod and main beam is monitored by health monitoring system and compared with the analysis results of finite element model to ensure that the stress and deformation of the structure under various working conditions are in a reasonable state. The results show that the proposed construction scheme can meet the safety and quality requirements of bridge construction, and the finite element model can reasonably predict the bridge behavior in construction. This study is expected to promote the construction of long-span half through steel box tied arch bridge.
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