Characterization of superload traffic for bridge safety evaluation

2021 ◽  
pp. 1381-1385
Author(s):  
Dan Su ◽  
Julian Jesso ◽  
Yingjie Wang
Keyword(s):  
Safety Evaluation ◽  
Bridge Safety

scholarly journals Genetic Diversity of Leuconostoc mesenteroides Isolates from Traditional Montenegrin Brine Cheese

2021 ◽  
Vol 9 (8) ◽  
pp. 1612
Author(s):  
Werner Ruppitsch ◽  
Andjela Nisic ◽  
Patrick Hyden ◽  
Adriana Cabal ◽  
Jasmin Sucher ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Safety Evaluation ◽  
Gene Clusters ◽  
Northern Region ◽  
Genomic Diversity ◽  
High Genetic Diversity ◽  
Pathogenic Factors ◽  
Flavor Development ◽  
Genomic Characterization

In many dairy products, Leuconostoc spp. is a natural part of non-starter lactic acid bacteria (NSLAB) accounting for flavor development. However, data on the genomic diversity of Leuconostoc spp. isolates obtained from cheese are still scarce. The focus of this study was the genomic characterization of Leuconostoc spp. obtained from different traditional Montenegrin brine cheeses with the aim to explore their diversity and provide genetic information as a basis for the selection of strains for future cheese production. In 2019, sixteen Leuconostoc spp. isolates were obtained from white brine cheeses from nine different producers located in three municipalities in the northern region of Montenegro. All isolates were identified as Ln. mesenteroides. Classical multilocus sequence tying (MLST) and core genome (cg) MLST revealed a high diversity of the Montenegrin Ln. mesenteroides cheese isolates. All isolates carried genes of the bacteriocin biosynthetic gene clusters, eight out of 16 strains carried the citCDEFG operon, 14 carried butA, and all 16 isolates carried alsS and ilv, genes involved in forming important aromas and flavor compounds. Safety evaluation indicated that isolates carried no pathogenic factors and no virulence factors. In conclusion, Ln. mesenteroides isolates from Montenegrin traditional cheeses displayed a high genetic diversity and were unrelated to strains deposited in GenBank.

Design Optimization and Safety Evaluation of Cross-Sea Bridge Barrier

2011 ◽  
Vol 97-98 ◽  
pp. 100-107
Author(s):  
Lei Fang ◽  
Liang Zhang ◽  
Shu Ming Yan ◽  
Ning Jia ◽  
Min Jing ◽  
...  
Keyword(s):  
Design Optimization ◽  
Impact Test ◽  
Safety Evaluation ◽  
Full Scale ◽  
Finite Elements Analysis ◽  
Acceptance Criteria ◽  
Analysis And Design ◽  
Bridge Safety ◽  
Study Results ◽  
New Type

By comprehensive analysis and design optimization of barrier structure parameters, a new type of beam-and-post steel barrier was invented according to impact test condition and acceptance criteria of cross-sea bridge barrier. Full-scale impact tests and finite elements analysis were conducted to do safty evalution of the barrier. The results show that, ASI value is 1.62 for test and that is 1.67 for FEA, THIV is 30.7km/h for test and that is 31.2km/h for FEA. Working width is 0.88m for test and that is 0.62m for FEA. Occupant risk evaluation index can meet the requirements of level B and the working width can meet the requirements of level W3. Both of tracking and posture of vehicles are well. The study results above show that safety performance of cross-sea bridge barrier can meet or exceed the acceptance criteria. FEA results are consistent with Full-scale impact test, which validate the reliability of FEA. cross-sea bridge barrier can meet the highest test level for beam-and-post steel barrier, which can defend the out-of-control vehicles effectively and help to ensure the bridge safety.

scholarly journals Mechanical and Typological Characterization of Traditional Stone Masonry Walls in Old Urban Centres: A Case Study in Viseu, Portugal

Buildings ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 18 ◽  
Author(s):  
José Carlos Domingues ◽  
Tiago Miguel Ferreira ◽  
Romeu Vicente ◽  
João Negrão
Keyword(s):  
Safety Evaluation ◽  
Stone Masonry ◽  
Masonry Walls ◽  
Masonry Buildings ◽  
Existing Buildings ◽  
Urban Center ◽  
In Situ Characterization

Essential for any intervention in existing buildings, a thorough knowledge of both structural and material characteristics is even more important in the case of traditional stone masonry buildings, due both to the variability of this technology’s properties and the degradation buildings might have sustained. In Portugal, a number of in situ and laboratory experimental campaigns has allowed us in recent years to expand the knowledge on the mechanical properties of stone masonry walls. Nevertheless, the existence of different wall typologies built with the same material necessitates that this characterization takes into account the various regional constructive cultures. This paper presents the results obtained through an in-situ characterization campaign carried out in the old urban center of Viseu, for which there is no information available in the literature. Granite stone masonry walls of two different buildings were analyzed and characterized considering their geometrical and material features, contributing to the identification of stone masonry typologies present in the city’s old urban center. Flat-jack testing yielded resistance and deformability parameters to be used both in safety evaluation and intervention design. The properties obtained can be said to be consistent with those deriving from other experimental campaigns, conducted in granite walls of different typologies, throughout the country. Simultaneously, relevant conclusions about the use of flat-jacks to characterize this type of stone masonry were drawn.

scholarly journals Mechanochemical Synthesis, In vivo Anti-malarial and Safety Evaluation of Amodiaquine-zinc Complex

2017 ◽  
Vol 34 (3) ◽  
pp. 221-233 ◽  
Author(s):  
Rotimi Olusanya Arise ◽  
Sunday-Nwaso Elizabeth ◽  
Samuel Tobi Farohunbi ◽  
Mikhail Olugbemiro Nafiu ◽  
Adedibu Clement Tella
Keyword(s):  
Mechanochemical Synthesis ◽  
Plasmodium Berghei ◽  
Zinc Complex ◽  
Safety Evaluation ◽  
Synthesis And Characterization ◽  
Treatment Groups ◽  
Repeated Use ◽  
Small Intestinal

Summary So far, some prospective metal-based anti-malarial drugs have been developed. The mechanochemical synthesis and characterization of Zn (II) complex with amodiaquine and its anti-malarial efficacy on Plasmodium berghei-infected mice and safety evaluation were described in this study. Solvent-free mechanochemical synthesis and characterization of Zn (II) complex with amodiaquine as well as its anti-malarial efficacy on NK-65 Plasmodium berghei-infected mice and safety were evaluated. Derivatization of amodiaquine with zinc (II) ion enhanced the activity of the drug through significant (p < 0.05) enhancement of parasitemia suppression in established malaria infection in comparison with the controls, while its capacity to clear malaria parasite was similar to that of chloroquine. A significant reduction in the liver, kidney and small intestinal activities of alkaline phosphatase, lactate dehydrogenase and alanine and aspartate aminotransferases was observed, while their levels increased significantly in the plasma. Levels of PCV, Hb, RBC and lymphocytes were significantly reduced (p < 0.05), and significant elevation (p < 0.05) in WBC and neutrophil concentrations across all the treatment groups when compared with control was observed. The result indicates that coordination of zinc (II) to amodiaquine by mechanical induction improved its anti-malarial activity, while the alterations in the investigated biochemical parameters suggest functional and structural toxicity. Thus, Zn (II) complex with amodiaquine may not be completely safe for prolonged and repeated use as an oral anti-malarial remedy.

Experimental study on the method of bridge safety evaluation

2008 ◽  
Author(s):  
Bong Chul Joo ◽  
Ki Tae Park ◽  
Woo Sang Lee ◽  
Hwang Yoon Koog
Keyword(s):  
Experimental Study ◽  
Safety Evaluation ◽  
Bridge Safety

scholarly journals Detection and characterization of the novel bacteriocin entomocin 9, and safety evaluation of its producer, Bacillus thuringiensis ssp. entomocidus HD9

2003 ◽  
Vol 95 (5) ◽  
pp. 990-1000 ◽  
Author(s):  
A. Cherif ◽  
S. Chehimi ◽  
F. Limem ◽  
B.M. Hansen ◽  
N.B. Hendriksen ◽  
...  
Keyword(s):  
Bacillus Thuringiensis ◽  
Safety Evaluation ◽  
The Novel

scholarly journals Research Strategies for Safety Evaluation of Nanomaterials. Part VI. Characterization of Nanoscale Particles for Toxicological Evaluation

2006 ◽  
Vol 90 (2) ◽  
pp. 296-303 ◽  
Author(s):  
Kevin W. Powers ◽  
Scott C. Brown ◽  
Vijay B. Krishna ◽  
Scott C. Wasdo ◽  
Brij M. Moudgil ◽  
...  
Keyword(s):  
Safety Evaluation ◽  
Research Strategies ◽  
Toxicological Evaluation ◽  
Nanoscale Particles

Research on Multi-Level Fuzzy Evaluation for Safety of Floating Bridge in Complicated Engineering Environment

2013 ◽  
Vol 312 ◽  
pp. 928-933
Author(s):  
Yin Zhi Zhou ◽  
Jian Ping Wang
Keyword(s):  
Risk Factors ◽  
Evaluation Model ◽  
Safety Evaluation ◽  
Fuzzy Evaluation ◽  
Factors Affecting ◽  
Evaluation Indexes ◽  
Bridge Safety ◽  
Engineering Environment ◽  
Floating Bridge ◽  
Floating Bridges

In this paper, according to the characteristics such as great traffic throat role, obvious target and easy-to-expose, and poor protection ability of the floating bridges established in wartime and on the basis of comprehensively analyzing all risk factors affecting the floating bridges, a floating-bridge safety evaluation indexes system and a grey matter-element evaluation model 41 specific factors in the complex environment containing are established using enemy's threat, commanding decision, river environment, personnel's operation, equipment's quality, load passing and other risk factors encountered by the floating bridges as the primary indexes. Then, a safety evaluation is made in combination with a floating bridge setting-up case, thus drawing up a conclusion that the safety of this floating bridge is in a moderate state. Meanwhile, the main factors affecting the safety of the floating bridges are determined, thus providing certain references for the safety evaluation of other engineering.

Application of Multi-Monitoring Information for Bridge Safety Evaluation

2012 ◽  
Vol 479-481 ◽  
pp. 493-496
Author(s):  
Yen Jen Lee ◽  
Jet Chau Wen ◽  
Chern Hwa Chen ◽  
Yuh Yi Lin
Keyword(s):  
Structural Damage ◽  
Safety Management ◽  
Safety Evaluation ◽  
Structural Safety ◽  
Bridge Health Monitoring ◽  
Stay Cables ◽  
Bridge Safety ◽  
Wind Vibration ◽  
Main Girder

Due to large flexibility in cable-stayed bridges, vibrations induced by seismic, traffic and wind loads are more significant than those in other types of bridges. These vibrations may cause structural damage, such as fatigue in stay cables, large deflection in main girder, etc. The objective of this paper is to investigate long-term dynamic characteristics of the Kao Ping Hsi cable-stayed bridge subjected to different external force conditions by using a bridge health monitoring system (BHMS). The bridge has been bearing the loads of traffic for more than a decade. To ensure the safety of the Bridge, the Bureau has developed a BHMS for the long-term monitoring of the overall structural safety over the entire operation stage in terms of seismic response, wind resisting response and cable vibration, as well as travel comfort. The BHMS will provide multi-alarm information for the study of bridge safety management and maintenance in relation to seismic activities, wind vibration and traffic.

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