{"id":2129,"date":"2026-03-03T12:23:55","date_gmt":"2026-03-03T11:23:55","guid":{"rendered":"https:\/\/glassfiber.wpenginepowered.com\/?post_type=aktuelt&p=2129"},"modified":"2026-05-12T09:40:57","modified_gmt":"2026-05-12T07:40:57","slug":"trefjaplasts-staljarn","status":"publish","type":"aktuelt","link":"https:\/\/glassfiber.no\/is\/aktuelt\/armeringsjern-i-glassfiber\/","title":{"rendered":"Trefjaplasts st\u00e1lj\u00e1rn"},"content":{"rendered":"

Glertrefjastyrkt st\u00e1l (GFRP) getur komi\u00f0 \u00ed sta\u00f0 st\u00e1lstyrkingar \u00ed steinsteypuvirkjum. Notkun \u00feess getur veri\u00f0 t\u00edmabundin \u2013 e\u00f0a varanleg \u00fear sem kr\u00f6fur eru um mikinn styrk, h\u00e6tta er \u00e1 t\u00e6ringu e\u00f0a til a\u00f0 for\u00f0ast e\u00f0a koma \u00ed veg fyrir framk\u00f6llun strauma fr\u00e1 rafsegulsvi\u00f0um.<\/h4>\n\n\n\n

Varan er umhverfisv\u00e6n lausn sem dregur verulega \u00far vi\u00f0ger\u00f0ar- og vi\u00f0haldskostna\u00f0i.<\/p>\n\n\n\n

Styrktarj\u00e1rnin eru framleidd me\u00f0 pultruderingu \u00ed samfelldu framlei\u00f0sluferli. H\u00e1g\u00e6\u00f0a gler\u00fer\u00e1\u00f0ur me\u00f0 p\u00f3l\u00fdester- e\u00f0a v\u00edn\u00fdl ester plastefni er nota\u00f0ur til styrkingar. D\u00e6migert trefjainnihald 75%.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Styrktarefni \u00far GFRP hefur tv\u00f6falt meiri styrk (togstyrk) en st\u00e1l. Efni\u00f0 hefur l\u00ednulega teygjanleika upp a\u00f0 brotni \u2013 svok\u00f6llu\u00f0u broth\u00e6ttu brotni. \u00deyngdin er \u00bc mi\u00f0a\u00f0 vi\u00f0 st\u00e1lstyrkingu.<\/p>\n\n\n\n

GFRP armeringsj\u00e1rn er f\u00e1anlegt \u00ed nafn\u00feverm\u00e1lum fr\u00e1 8 mm upp \u00ed 38 mm.<\/p>\n\n\n\n

Horn \/ beygjur eru f\u00e1anlegar \u00ed \u00fdmsum \u00fatf\u00e6rslum \u00ed 2D e\u00f0a 3D formum, svipa\u00f0 og st\u00e1lj\u00e1rn.<\/p>\n\n\n\n

Styrktarefni \u00far GFRP hefur tv\u00f6falt meiri styrk (togstyrk) en st\u00e1l. Efni\u00f0 hefur l\u00ednulega teygjanleika upp a\u00f0 brotni \u2013 svok\u00f6llu\u00f0u broth\u00e6ttu brotni. \u00deyngdin er \u00bc mi\u00f0a\u00f0 vi\u00f0 st\u00e1lstyrkingu.<\/p>\n\n\n\n

GFRP armeringsj\u00e1rn er f\u00e1anlegt \u00ed nafn\u00feverm\u00e1lum fr\u00e1 8 mm upp \u00ed 38 mm.<\/p>\n\n\n\n

Horn \/ beygjur eru f\u00e1anlegar \u00ed \u00fdmsum \u00fatf\u00e6rslum \u00ed 2D e\u00f0a 3D formum, svipa\u00f0 og st\u00e1lj\u00e1rn.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n
<\/td>Eining<\/td> S<\/td>P<\/td><\/tr>
Trefjar<\/td><\/td>gler<\/td>gler<\/td><\/tr>
Res\u00edn<\/td><\/td>p\u00f3l\u00fdester<\/td>V\u00edn\u00fdlester<\/td><\/tr>
Ums\u00f3kn<\/td><\/td>t\u00edmabundi\u00f0<\/td>varanlega<\/td><\/tr>
Litak\u00f3\u00f0i<\/td><\/td>bl\u00e1r<\/td>gr\u00e1r<\/td><\/tr>
Togstyrkur<\/td>MPa<\/td>1,000<\/td>1,000<\/td><\/tr>
E-eining<\/td>GPa<\/td>50<\/td>60<\/td><\/tr>
Sj\u00e1lfs\u00feyngd<\/td>g\/cm\u00b3<\/td>2,1<\/td>2,1<\/td><\/tr>
\u00deverm\u00e1l<\/td>o.s.frv.<\/td>6-45<\/td>6-45<\/td><\/tr>
Lenging vi\u00f0 brot<\/td>2.1<\/td>2.1<\/td>2.1<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

GFRP-styrkingarj\u00e1rni\u00f0 hefur gengist undir \u00edtarlegar pr\u00f3fanir vi\u00f0 Sherbrooke-h\u00e1sk\u00f3lann \u00ed Kanada, sem er lei\u00f0andi stofnun \u00ed heiminum \u00ed ranns\u00f3knum \u00e1 GFRP-styrkingu \u00ed byggingari\u00f0na\u00f0inum. Byggt \u00e1 ni\u00f0urst\u00f6\u00f0um pr\u00f3fana er varan h\u00e6f sem varanleg styrking \u00ed steinsteypuvirkjum.<\/p>\n\n\n\n

Lei\u00f0beiningar\/sta\u00f0lar<\/h4>\n\n\n\n

\u2013 ACI 440.1R-15 \u2013 Lei\u00f0beiningar um h\u00f6nnun og sm\u00ed\u00f0i \u00e1 bur\u00f0arvirkjum \u00far steinsteypu styrktum me\u00f0 trefjastyrktum p\u00f3l\u00fdmerst\u00f6ngum (FRP)<\/p>\n\n\n\n

St\u00e6r\u00f0fr\u00e6\u00f0i<\/h4>\n\n\n\n

V\u00e9lr\u00e6nir eiginleikar FRP-styrktarj\u00e1rns eru fr\u00e1brug\u00f0nir hef\u00f0bundnum st\u00e1lstyrktarj\u00e1rnum \u00e1 nokkrum svi\u00f0um. \u00deetta skapar nokkrar \u00e1skoranir vi\u00f0 \u00fer\u00f3un h\u00f6nnunara\u00f0fer\u00f0a fyrir steinsteypubyggingar styrktar me\u00f0 trefjaplasti.<\/p>\n\n\n\n

Almennar h\u00f6nnunarlei\u00f0beiningar fyrir beygju steypueininga me\u00f0 GFRP-styrktarj\u00e1rnum eru gefnar \u00ed ACI 440.1R-06 (2006) Lei\u00f0beiningar um h\u00f6nnun og sm\u00ed\u00f0i steypustyrktrar mannvirkja me\u00f0 FRP-st\u00f6ngum, sem birtar voru af nefnd 440 hj\u00e1 bandar\u00edsku steypustofnuninni (ACI).<\/p>\n\n\n\n

Ums\u00f3knir<\/h4>\n\n\n\n
    \n
  • Berar mannvirki<\/li>\n\n\n\n
  • Framhli\u00f0arpl\u00f6tur<\/li>\n\n\n\n
  • Endurn\u00fdjun og styrking<\/li>\n\n\n\n
  • Bygging fyrir innvi\u00f0i<\/li>\n\n\n\n
  • \u00dej\u00f3\u00f0vegir<\/li>\n\n\n\n
  • H\u00e1hra\u00f0alestar<\/li>\n\n\n\n
  • Forsteypt steypa<\/li>\n\n\n\n
  • G\u00f6nghlutar<\/li>\n\n\n\n
  • N\u00e1muvinnsla<\/li>\n\n\n\n
  • St\u00edflur<\/li>\n<\/ul>\n\n\n\n

    Ums\u00f3knir<\/h4>\n\n\n\n
      \n
    • Spennist\u00f6\u00f0var<\/li>\n\n\n\n
    • \u00d6xulhringir<\/li>\n\n\n\n
    • Vatnalei\u00f0averkfr\u00e6\u00f0i<\/li>\n\n\n\n
    • T\u00edmabundin notkun (Soft Eye)<\/li>\n\n\n\n
    • J\u00e1rnbraut<\/li>\n\n\n\n
    • Ranns\u00f3knara\u00f0sta\u00f0a<\/li>\n\n\n\n
    • Grunnur<\/li>\n\n\n\n
    • I\u00f0na\u00f0arverksmi\u00f0jur<\/li>\n\n\n\n
    • Svalir<\/li>\n\n\n\n
    • Gangst\u00e9tt<\/li>\n<\/ul>\n\n\n\n
      \n
      \"\"<\/figure>\n\n\n\n
      \"\"<\/figure>\n\n\n\n
      \"\"<\/figure>\n<\/figure>\n\n\n\n
      \n
      \"\"<\/figure>\n\n\n\n
      \"\"<\/figure>\n\n\n\n
      \"\"<\/figure>\n<\/figure>\n\n\n\n

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