Seismic Design of Tied Arch Bridge in High Earthquake Region Based on Friction Pendulum Seismic Isolation Bearing

To study the mechanical performance and stability of tied-arch bridge under structural defects and damages, limited element modal of Panzhihua Luoguo Jinshajiang Bridge was established and analyzed. Firstly, some typical damage models and their influence factors were presented. Then, based on the model established, change of suspender force caused by arch rib lineation defect, hanger lineation defect and boom failure was calculated respectively. The stability safety factor under the load group composed of dead load, live load and wind was calculated as well as the second-class nonlinear stability safety factor under structural initial defect. Calculation results shows that, suspender forces were more sensitive to archs vertical defect than to transverse defect. While, short hangers were more sensitive to lineation defect than long ones, and secondary inner force in short booms were bigger than in long ones. The result also tells that lateral wind is bad to lateral stability. Lift wind, somehow, makes positive contribution to structures in-plane stability. Structural initial defect can draw down the second-class stability safety factor under geometric nonlinear condition.

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A comparative study of base isolation devices in light rail transit structure featured with lead rubber bearing and friction pendulum system

MATEC Web of Conferences ◽

10.1051/matecconf/201819502013 ◽

2018 ◽

Vol 195 ◽

pp. 02013

Author(s):

Santi Nuraini ◽

Asdam Tambusay ◽

Priyo Suprobo

Keyword(s):

Seismic Isolation ◽

Time History ◽

Light Rail ◽

Rail Transit ◽

Light Rail Transit ◽

Pendulum System ◽

Rubber Bearing ◽

Lead Rubber Bearing ◽

Friction Pendulum ◽

Friction Pendulum System

Advanced nonlinear analysis in light rail transit (LRT) structures has been undertaken to examine the influence of seismic isolation devices for reducing seismic demand. The study employed the use of two types of commercially available bearings, namely lead rubber bearing (LRB) and friction pendulum system (FPS). Six LRT structures, designed to be built in Surabaya, were modelled using computer-aided software SAP2000, where each of the three structures consisted of three types of LRB and FPS placed onto the pier cap to support the horizontal upper-structural member. Nonlinear static pushover and dynamic time history analysis with seven improved ground motion data was performed to gain improved insights on the behavioural response of LRT structures, allowing one to fully understand the supremacy of seismic isolations for protecting the structure against seismic actions. It is shown that both devices manage to isolate seismic forces, resulting in alleviation of excessive base shear occurring at the column. In addition, it is noticeable that the overall responses of LRB and FPS shows marginal discrepancies, suggesting both devices are interchangeable to be used for LRT-like structures.

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Construction Monitoring Technology Research on Large-Span V Structure Tied Arch Bridge

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.351-352.1240 ◽

2013 ◽

Vol 351-352 ◽

pp. 1240-1243 ◽

Cited By ~ 1

Author(s):

Ting Yin ◽

Wei Zhang ◽

Yan Bo Zhao ◽

Xiao Long Sun

Keyword(s):

Actual State ◽

Construction Process ◽

Bridge Construction ◽

Monitoring Point ◽

Monitoring Technology ◽

Construction Monitoring ◽

Arch Bridge ◽

Large Span ◽

Long Span ◽

Tied Arch Bridge

Large-span V structure tied arch bridge structure system is complex. In order to make the actual state of the bridge into the ideal state of maximum close to the design, we must make real-time monitoring in the key parts of the structure, and adjust to the design of the data by analysis calculated, to ensure the safety and reliability of arch bridge in the course of construction and into stress after the completed bridge. Combined with the construction monitoring of the main Xinglong Bridge on Si River, this paper introduces the main bridge construction process measurement a preliminary study on the large span V configuration basket tied arch bridge construction monitoring technology. Based on the construction monitoring of Xinglong Bridge on Si River, this paper introduces the main contents and methods of monitoring point location, monitoring control of construction process, and discussed the construction monitoring technology of long-span X-style tied arch bridge V structure.

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