Study on Suspender’s Fatigue Performance of Half-through CFST Arch Bridge due to Vehicular Loads

Due to the repeated action of vehicular loads, fatigue failure of suspenders of half-through arch bridge is main failure type. Usually the stress history of suspender is relevant with the vehicle load, dynamic property of structure and so on. In this paper, the traffic load spectrum investigation of Ha-Tong road is constructed through a 24-hour traffic flow investigation; And the space FEM established to get the stress response；Assume the fatigue performance of suspender as stochastic variable, the stress history of suspender is a stochastic process which changes with time, fatigue reliability analysis model is suggested based on accumulated damage model；Taking YIlan bridge as an example, the study on the effect of suspenders’ length and deck type are carried out. The research method and results can be referenced while designing or evaluating the same bridge type.

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Reliability Assessment of Fatigue Life of Hangers in Large-Span Suspension Bridges

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.147.149 ◽

2011 ◽

Vol 147 ◽

pp. 149-152

Author(s):

Yong Zeng ◽

Hong Mei Tan

Keyword(s):

Time History ◽

Public Confidence ◽

Suspension Bridges ◽

Fatigue Reliability ◽

Load Spectrum ◽

Accurate Analysis ◽

Vehicle Load ◽

History Of ◽

Vehicle Loads ◽

Main Cables

Hangers are very important components for suspension bridges, which link main cables and stiffening girders. When in service, hangers are much vulnerable to fatigue loads due to kinds of traffic flows, which may reduce the remaining life of the hangers and increase the risk of losing public confidence in cable supported bridges. In order to quantify the reliability of hangers under vehicle loads, fatigue reliability formula of hangers is proposed in this paper. Based on the accurate analysis of vehicle load spectrum, the time history of hangers is simulated and maintenance strategy is proposed.

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Statistical Analysis of Loader’s Drive Axle Housing Random Load Spectrum

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.338.456 ◽

2011 ◽

Vol 338 ◽

pp. 456-459 ◽

Cited By ~ 1

Author(s):

Bu Zheng Wen ◽

Jian Min Li ◽

Zhong Tao Pei ◽

Sheng Yu ◽

Cuan Yang Sun ◽

...

Keyword(s):

Statistical Analysis ◽

Weibull Distribution ◽

Fatigue Reliability ◽

Load Spectrum ◽

Distribution Fitting ◽

Random Load ◽

Structural Fatigue ◽

History Of ◽

Drive Axle ◽

Drive Axle Housing

Statistical analysis of load spectrum is an important part on structural fatigue life and reliability research, it is generally considered that axle’s load spectrum follows Weibull distribution. This paper tested ZL50 loader’s loading history of different working conditions , and obtained the corresponding load spectrum by rain-flow counting method, then analyzed three distributions’ (normal distribution, lognormal distribution, Weibull distribution) fitting degree of load spectrum and effect on the fatigue reliability. Results show that the highest fitting degree of distribution function should be used to fit load spectrum, which can reduce the error in structural fatigue reliability prediction.

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SEJARAH KONFLIK KEBANGKITAN ISLAM DI MINANGKABAU: Sebuah Tinjauan Awal Terhadap Proses Kemunculannya

Khazanah : Jurnal Sejarah dan Kebudayaan Islam ◽

10.15548/khazanah.v0i0.13 ◽

2018 ◽

pp. 33-48

Author(s):

Ihsan Sanusi

Keyword(s):

Human Life ◽

Initial Period ◽

Analysis Model ◽

Islamic Revival ◽

Religious Texts ◽

Interactive Analysis ◽

The Past ◽

The Reformation ◽

History Of ◽

Correct Understanding

This article in principle wants to examine the history of the emergence of the conflict of Islamic revival in Minangkabau starting from the Paderi Movement to the Youth in Minangkabau. Especially in the initial period, namely the Padri movement, there was a tragedy of violence (radicalism) that accompanied it. This study becomes important, because after all the reformation of Islam began to be realized by reforming human life in the world. Both in terms of thought with the effort to restore the correct understanding of religion as it should, from the side of the practice of religion, namely by reforming deviant practices and adapted to the instructions of the religious texts (al-Qur'an and sunnah), and also from the side of strengthening power religion. In this case the research will be directed to the efforts of renewal by the Padri to the Youth towards the Islamic community in Minangkabau. To discuss this problem used historical research methods. Through this method, it is tested and analyzed critically the records and relics of the past. In analyzing the data in this research basically used approach or interactive analysis model by Miles and Huberman. In this analysis model, the three components of the analysis are data reduction, data presentation, and conclusion drawing or verification, the activity is carried out in an interactive form with the process of collecting data as a process that continues, repeats, and continues to form acycle.

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Stress history of folding and cleavage development, Baraboo syncline, Wisconsin

Geological Society of America Bulletin ◽

10.1130/0016-7606(1975)86<1671:shofac>2.0.co;2 ◽

1975 ◽

Vol 86 (12) ◽

pp. 1671 ◽

Cited By ~ 7

Author(s):

I.W.D. DALZIEL ◽

G. L. STIREWALT

Keyword(s):

Stress History ◽

History Of

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Improved numerical model for fatigue cumulative damage of mechanical structure considering load sequence and interaction

Advances in Mechanical Engineering ◽

10.1177/1687814021995309 ◽

2021 ◽

Vol 13 (2) ◽

pp. 168781402199530

Author(s):

Bixiong Huang ◽

Shuci Wang ◽

Shuanglong Geng ◽

Xintian Liu

Keyword(s):

Fatigue Life ◽

Theoretical Basis ◽

Life Prediction ◽

Damage Model ◽

Cumulative Damage ◽

Load Spectrum ◽

Random Load ◽

Mechanical Parts ◽

Proposed Model ◽

Load Sequence

To more accurately predict the fatigue life of components under the action of random loads, it is necessary to explore the influence of the interaction between the load sequence and the load on the life prediction. Based on the Manson-Halford method and Corten-Dolan model, this paper establishes a fatigue cumulative damage model that takes into account both the load order and the interaction between loads, and also takes into account the loads near the fatigue limit. The fatigue life of mechanical parts under random load can be calculated through this model, which provides a theoretical basis for life prediction under random load spectrum. The fatigue life of mechanical parts under random load can be calculated through this model, which provides a theoretical basis for life prediction under random load spectrum. Comparing the calculation results of the proposed model with the results of Palmgren Miner, Manson-Halford method, and Corten-Dolan model, it is found that the fatigue damage model established can reasonably predict the fatigue life of parts. Comparison and verification of examples further prove the accuracy and reliability of the proposed model.

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A Damage Model Containing Delamination in Composite Laminates

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.324-325.43 ◽

2006 ◽

Vol 324-325 ◽

pp. 43-46

Author(s):

Yu Pu Ma ◽

Xin Zhi Lin ◽

Qing Fen Li ◽

Zhen Li

Keyword(s):

Composite Laminates ◽

Damage Model ◽

Laminated Composite ◽

Shear Lag ◽

Analysis Model ◽

Transverse Cracks ◽

Transverse Cracking ◽

Stiffness Reduction ◽

Laminated Composite Materials ◽

Modulus Reduction

When stress is high, delaminate damage can be induced by transverse cracks. A complete parabolic shear-lag damage model containing delamination induced by transverse cracks is therefore proposed and applied to predict the stiffness reduction by transverse cracking in cross-ply laminated composite materials. The predictions of the complete parabolic shear-lag analysis model, the incomplete parabolic shear-lag analysis model, and the complete parabolic shear-lag damage model containing delamination proposed in this paper have been compared. Results show that the young’s modulus reduction values obtained by our analysis model are better agreement with the experimental ones than other models.

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Fatigue Damage Accumulation under the Complex Varying Loading

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.617.187 ◽

2014 ◽

Vol 617 ◽

pp. 187-192 ◽

Cited By ~ 8

Author(s):

Boris Melnikov ◽

Artem Semenov

Keyword(s):

Damage Accumulation ◽

Low Cycle Fatigue ◽

Damage Model ◽

Hysteresis Loops ◽

Fatigue Analysis ◽

Wave Loads ◽

Fatigue Damage Accumulation ◽

History Of ◽

Strain Stress ◽

Irregular Loading

Fatigue analysis of steel parts of structures, which are subjected to complex irregular loading programs caused by wind, thermal, wave loads, earthquakes and combined imposed actions, requires in some cases using special methods of stress-strain evaluation. The model of the low cycle fatigue nonlinear damage accumulation is developed with taking into account the history of the deformation process. The damage is defined on the base of considering the quasi-static accumulation of maximal strain (stress) and hysteresis loops. The identification of material constants of the model is discussed. Application of the damage model for fatigue analysis of the antennas, pipelines, basements and fasteners units is considered and a comparison with experiments is given.

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Cost-Effectiveness of Universal Prophylaxis in Pregnancy with Prior Group B Streptococci Colonization

Infectious Diseases in Obstetrics and Gynecology ◽

10.1155/2009/934698 ◽

2009 ◽

Vol 2009 ◽

pp. 1-11 ◽

Cited By ~ 7

Author(s):

Mark A. Turrentine ◽

Mildred M. Ramirez ◽

Joan M. Mastrobattista

Keyword(s):

Early Onset ◽

Positive Culture ◽

Cost Effective ◽

Decision Analysis Model ◽

Analysis Model ◽

Group B Streptococci ◽

Neonatal Deaths ◽

History Of ◽

Group B ◽

Universal Treatment

Objective. To estimate the costs and outcomes of rescreening for group B streptococci (GBS) compared to universal treatment of term women with history of GBS colonization in a previous pregnancy.Study Design. A decision analysis model was used to compare costs and outcomes. Total cost included the costs of screening, intrapartum antibiotic prophylaxis (IAP), treatment for maternal anaphylaxis and death, evaluation of well infants whose mothers received IAP, and total costs for treatment of term neonatal early onset GBS sepsis.Results. When compared to screening and treating, universal treatment results in more women treated per GBS case prevented (155 versus 67) and prevents more cases of early onset GBS (1732 versus 1700) and neonatal deaths (52 versus 51) at a lower cost per case prevented ($8 805 versus $12 710).Conclusion. Universal treatment of term pregnancies with a history of previous GBS colonization is more cost-effective than the strategy of screening and treating based on positive culture results.

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