Numerical Analysis of S-Shape Curved Continuous Rigid-Frame Bridges with High Piers under Earthquakes

2010 ◽  
Author(s):  
Yunjie Dai ◽  
Hongping Zhu
Keyword(s):  
Numerical Analysis ◽  
Rigid Frame

Safety Assessment of Slant Legged Rigid Frame Bridge Based on Field Testing

2013 ◽  
Vol 574 ◽  
pp. 163-175
Author(s):  
Yan Li ◽  
Hong Tao Bi ◽  
Bing Han Li ◽  
Yong Jun Wang
Keyword(s):  
Finite Element ◽  
Numerical Analysis ◽  
Bearing Capacity ◽  
Field Testing ◽  
Control Measures ◽  
Original Design ◽  
Loading Test ◽  
Element Analysis ◽  
Rigid Frame ◽  
Rigid Frame Bridge

The safety and load-bearing capacity of an in-service urban reinforced concrete slant leg rigid frame bridge over railway is assessed by field testing and finite element analysis. The bridge is located in Qitaihe city, the northeastern of China. The two heavy trucks and three different loading test configurations are used in experiment. The three load figuration is set up and performed based on the result of technical condition investigation and finite element numerical analysis. The vertical displacement and key section strain response are recorded during experiment. Loading-bearing capacity and safety performance of the bridge is analyzed and evaluated according to measured data combining with numerical analysis. The testing result shows that structural stiffness and strength of the bridge do not satisfy the requirements of the original design. Based on the assessment result, some proposals are proposed to the management office. A moderate maintenance and reinforcement treatment should be carried out for this bridge to improve the bearing capacity and ensure safety operation. Before that completed some traffic control measures should be taken to avoid aggravating diseases and damages of the bridge due to passing heavy vehicle.

scholarly journals Numerical Analysis of Rigid Frame Joint with Textile Carbon Reinforcement

2019 ◽  
Vol 292 ◽  
pp. 159-163
Author(s):  
Jiří Žalský ◽  
Tomáš Vlach ◽  
Lenka Laiblová ◽  
Zuzana Jirkalová ◽  
Jakub Řepka ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Crack Opening ◽  
Experimental Tests ◽  
Concrete Cover ◽  
Concrete Slabs ◽  
Textile Reinforced Concrete ◽  
Load Bearing ◽  
Rigid Frame ◽  
Rigid Frames ◽  
2D Model

Benefit of textile reinforced concrete (TRC) is absent of necessary concrete cover because of the durabulity. It allows creating concrete slabs only about 10 mm thick. Therefore, TRC going to be very popular, and more often used in design and load-bearing structures. Big problem in designing of load-bearing structures are rigid frames. The aim of this paper is clarify behavior of thin concrete rigid frames with carbon textile reinforcement by numerical analysis and influences of carbon reinforcement anchoring to the crack opening. Model was created in Atena Science as 2D model and necessary parameters were determined by experimental tests.

Study on Seismic Failure Mode of a Rigid Frame Bridge with Super High-Rise Piers

2012 ◽  
Vol 256-259 ◽  
pp. 1458-1461
Author(s):  
Zhen Hua Fan ◽  
Xie Dong Zhang ◽  
Hang Zhang
Keyword(s):  
Numerical Analysis ◽  
Failure Mode ◽  
Plastic State ◽  
Mountainous Areas ◽  
Analysis Model ◽  
High Rise ◽  
Rigid Frame ◽  
History Analysis ◽  
Bridge Type ◽  
Rigid Frame Bridge

Recently rigid-frame bridges have been built for only twenty years in China and they have been used as the preferred bridge type in complicated terrain mountainous areas. Based on the fiber model in Opensees, the typical nonlinear numerical analysis model of a rigid frame bridge with super high-rise piers is presented. IDA method is adopted for the nonlinear dynamic history analysis for the structure. The failure mode and the characteristic of plastic development are investigated under longitudinal seismic actions. The results show that multiple key sections of the piers enter the plastic state simultaneously and the structure will become dynamic instable inevitably.

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