ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1979.tb00268.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1979.tb00269.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1979.tb00270.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

摘要:

As part of continuing research on steel bearing piles, an investigation was carried out by British Steel Corporation in an attempt to gather data which will illuminate the areas of contention for limiting stress levels to be raised, thereby allowing economies to be made and customers' confidence to be increased in selecting steel bearing piles for a particular application.To assess the characteristics of dynamic and static loading, a strain gauge measurement technique was used. Blow by blow stress analyses were carried out. In total 700 blows were examined. The full record of 700 blows and static observations can be obtained from The We/ding Research Department, of BSC's Teeside Laboratories, Middlesbrough.The results reveal that during the course of driving the pile through hard strata, the impact stresses were 0.6 to 0.7 times the minimum yield stress, at the last blow. These impulsive stresses had no discernable effect on the structure of the piles. Results obtained suggest that considerable increase in design stresses might safely be adopted for steel bearing piles. One of the aims of this long term research is to produce a dynamic testing system which gives more accurate results than can be obtained from traditional methods.

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1979.tb00271.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

摘要:

This note describes practical uses of high quality slip rings for strain gauge measurements on rotating machinery. The advantages and disadvantages of various circuits are discussed and recommendations made for the best performance. Consideration is given to the most efficient use of the number of slip rings in a given system for the maximum data which can be obtained avoiding errors caused by slip ring noise. Other parameters which are considered are: the voltage applied to the bridge; the number of rings used to deliver power to the strain gauges and the gauge resistance. Some practical information on slip ring noise, life and cross talk and how to reduce it in the Chevron Bridge Circuit is also discussed.

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1979.tb00272.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1979.tb00273.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1979.tb00274.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

摘要:

Book reviewed in this article:Non‐Linear Problems in Stress Analysis, by P. StanleyNumerical Methods in Offshore Engineering, Edited by O. C. Zienkiewicz, R. W. Lewis, K. G. Sta

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1979.tb00275.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1979.tb00276.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY