NO20005748L - Fremgangsmåte for å måle spenningen i en forspent bjelke - Google Patents

Fremgangsmåte for å måle spenningen i en forspent bjelke

Info

Publication number
NO20005748L
NO20005748L NO20005748A NO20005748A NO20005748L NO 20005748 L NO20005748 L NO 20005748L NO 20005748 A NO20005748 A NO 20005748A NO 20005748 A NO20005748 A NO 20005748A NO 20005748 L NO20005748 L NO 20005748L
Authority
NO
Norway
Prior art keywords
curve
constant
measuring
slope
determined
Prior art date
Application number
NO20005748A
Other languages
English (en)
Other versions
NO20005748D0 (no
Inventor
Bernard Basile
Bruno Lancia
Original Assignee
Freyssinet Int Stup
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Freyssinet Int Stup filed Critical Freyssinet Int Stup
Publication of NO20005748D0 publication Critical patent/NO20005748D0/no
Publication of NO20005748L publication Critical patent/NO20005748L/no

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/24—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for determining value of torque or twisting moment for tightening a nut or other member which is similarly stressed
    • G01L5/246—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for determining value of torque or twisting moment for tightening a nut or other member which is similarly stressed using acoustic waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/028—Material parameters
    • G01N2291/02827—Elastic parameters, strength or force

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

Måling in situ av restspenninga F, i en forspent bjelke støttet mellom to forankringspunkter måles ved å måle den toveise forplantningstida T, for ei ultralydsbølge mellom de to endene på bjelken, og F, evalueres utfra formelen F, = F0+ kb -(T, - T0). Gjennom en forhåndskalibrering utført uten demontering, utsettes bjelken for ei varierende trekk- kraft F. En kurve (C) tas opp som viser sammenhengen mellom krafta F og tida T, og konstanten T0 bestemmes til å være den toveise forplantningstida målt for F=O, kurven tilnærmes i nærheten av verdien F = 0 med ei første rette linje (D,) med stigning k,, en øvre del av kurven tilnærmes med ei andre rette linje (D^ med stigning kL, konstanten F0 tilnærmes til å være trekkrafta F tilsvarende til skjæringspunktet mellom den første og andre rette linja og konstanten kb bestemmes utfra l/kb = (1/kJ - (l/ka).
NO20005748A 1999-11-29 2000-11-14 Fremgangsmåte for å måle spenningen i en forspent bjelke NO20005748L (no)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9914989A FR2801670B1 (fr) 1999-11-29 1999-11-29 Procede pour mesurer par ultrason la tension residuelle d'une barre de precontrainte

Publications (2)

Publication Number Publication Date
NO20005748D0 NO20005748D0 (no) 2000-11-14
NO20005748L true NO20005748L (no) 2001-05-30

Family

ID=9552644

Family Applications (1)

Application Number Title Priority Date Filing Date
NO20005748A NO20005748L (no) 1999-11-29 2000-11-14 Fremgangsmåte for å måle spenningen i en forspent bjelke

Country Status (14)

Country Link
US (1) US6327912B2 (no)
EP (1) EP1103802B1 (no)
JP (1) JP3689636B2 (no)
KR (1) KR100512608B1 (no)
AU (1) AU771417B2 (no)
BR (1) BR0005660A (no)
CA (1) CA2326648C (no)
FR (1) FR2801670B1 (no)
HK (1) HK1039368A1 (no)
NO (1) NO20005748L (no)
PL (1) PL198451B1 (no)
SG (1) SG90202A1 (no)
TR (1) TR200003519A2 (no)
ZA (1) ZA200006945B (no)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2756916B1 (fr) * 1996-12-06 1999-02-12 Eurocopter France Appareil de mesure d'un jeu entre deux pieces
WO2003106992A2 (en) * 2002-06-17 2003-12-24 Swagelok Company Ultrasonic testing of fitting assembly
JP4205051B2 (ja) 2004-12-21 2009-01-07 仙之助 高橋 応力測定方法およびその装置
US8348628B2 (en) * 2006-08-15 2013-01-08 General Electric Company System and method for monitoring a reciprocating compressor
DE102007007333A1 (de) * 2007-02-14 2008-08-21 Wacker Chemie Ag Verfahren zur Reinigung von L-Cystein
GB0815038D0 (en) * 2008-08-18 2008-09-24 Seaman Peter Improvements in or relating to analysing structual memebers
CN103528720B (zh) * 2013-10-25 2015-04-01 交通运输部公路科学研究所 体外预应力钢束应力精确检测装置及方法
CN106770660A (zh) * 2017-01-20 2017-05-31 桂林电子科技大学 一种高精度的应力波信号采集方法及设备
CN106813819B (zh) * 2017-04-05 2019-06-25 西南交通大学 一种超声波法测量曲面工件残余应力的方法
CN109029840B (zh) * 2018-09-03 2020-11-06 杭州戬威机电科技有限公司 一种炸药残余应力超声检测法声弹系数标定方法
CN109186842A (zh) * 2018-10-17 2019-01-11 成都众柴科技有限公司 一种基于磁弹效应的钢缆索应力测量方法
CN111982677B (zh) * 2020-08-03 2022-05-10 重庆大学 一种预应力混凝土框架结构初始有效预压力现场检测方法
CN112683425A (zh) * 2021-01-21 2021-04-20 交通运输部公路科学研究所 一种桥梁体内纵向预应力筋有效应力的检测方法
CN114319880B (zh) * 2022-03-07 2022-05-27 四川交达预应力工程检测科技有限公司 预应力张拉限位装置的限位空间的确定方法及系统
CN114323389B (zh) * 2022-03-14 2022-05-17 四川交达预应力工程检测科技有限公司 预应力检测方法、不分级快速连续张拉方法及系统

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2750498A (en) * 1952-07-05 1956-06-12 Rca Corp Synchronization of television deflection systems
US4143518A (en) * 1976-10-19 1979-03-13 Kellogg Smith Ogden Internal combustion and steam engine
US4333351A (en) * 1980-02-25 1982-06-08 Raymond Engineering Inc. Method and apparatus for measuring the residual tension in a stud or a bolt
FR2507232A1 (fr) * 1981-06-09 1982-12-10 Freyssinet Int Stup Dispositif de mise en tension de barres de precontrainte et de determination de cette tension
US4485677A (en) * 1981-06-09 1984-12-04 Freyssinet International (Stup) Device for tensioning pre-stress bars and for determining this tension
US4413518A (en) * 1981-07-20 1983-11-08 Ndt Instruments, Inc. Apparatus and method for measuring the extension of bolts under stress
US4899591A (en) * 1987-09-11 1990-02-13 Sps Technologies, Inc. Ultrasonic load indicating member, apparatus and method
US5220839A (en) * 1990-08-27 1993-06-22 Ultrafast, Inc. Ultrasonic load measuring device with control feature
US5461923A (en) * 1994-05-16 1995-10-31 Raymond Engineering Inc. Acoustic transducer, transducerized fastener and method of manufacture
SE507466C2 (sv) * 1995-09-22 1998-06-08 Atlas Copco Controls Ab Metod för bestämning av axialkraften i en långsträckt kropp
FR2750498B1 (fr) * 1996-07-01 1998-09-04 Freyssinet Int Stup Procede pour mesurer par ultrasons la tension residuelle d'une barre de precontrainte metallique

Also Published As

Publication number Publication date
TR200003519A3 (tr) 2001-06-21
SG90202A1 (en) 2002-07-23
TR200003519A2 (tr) 2001-06-21
BR0005660A (pt) 2001-07-17
NO20005748D0 (no) 2000-11-14
EP1103802A1 (fr) 2001-05-30
PL198451B1 (pl) 2008-06-30
AU771417B2 (en) 2004-03-18
PL344177A1 (en) 2001-06-04
KR20010051933A (ko) 2001-06-25
JP3689636B2 (ja) 2005-08-31
US20010001929A1 (en) 2001-05-31
CA2326648C (fr) 2005-01-18
US6327912B2 (en) 2001-12-11
HK1039368A1 (en) 2002-04-19
JP2001174344A (ja) 2001-06-29
AU7189400A (en) 2001-05-31
KR100512608B1 (ko) 2005-09-06
FR2801670B1 (fr) 2002-02-01
FR2801670A1 (fr) 2001-06-01
ZA200006945B (en) 2001-05-28
CA2326648A1 (fr) 2001-05-29
EP1103802B1 (fr) 2006-02-08

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Legal Events

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