{"id":34031,"date":"2023-03-23T10:48:44","date_gmt":"2023-03-23T09:48:44","guid":{"rendered":"https:\/\/strusoft.com\/?p=34031"},"modified":"2024-05-20T10:43:38","modified_gmt":"2024-05-20T08:43:38","slug":"sekundsnabba-analyser-pa-bifrost-innovativ-trabro","status":"publish","type":"post","link":"https:\/\/strusoft.com\/sv\/blog\/fem-design-sv-2\/sekundsnabba-analyser-pa-bifrost-innovativ-trabro\/","title":{"rendered":"Sekundsnabba analyser p\u00e5 innovativ tr\u00e4bro"},"content":{"rendered":"<p><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"max-width:1424.8px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-text fusion-text-1\" style=\"--awb-text-transform:none;\"><p><strong>P\u00e5 kort tid har den innovativa tr\u00e4bron BIFROST uppm\u00e4rksammats i byggbranschen. Den kreativa broid\u00e9n togs fram av ett team av ingenj\u00f6rer, arkitekter och offentliga akt\u00f6rer och vann en innovationst\u00e4vling. <a href=\"\/software\/3d-structural-analysis-software-fem-design\/\">FEM-Design<\/a> var ett av verktygen f\u00f6r att kunna realisera id\u00e9n till t\u00e4vlingsbidraget d\u00e4r analyserna p\u00e5 brokonstruktionen gick mycket snabbt.<\/strong><\/p>\n<p>Hur kan man bygga en g\u00e5ng- och cykelbro i l\u00e4ttviktsmaterial och som passar i det allm\u00e4nna rummet och har minimal milj\u00f6p\u00e5verkan? Den fr\u00e5gan st\u00e4llde innovationst\u00e4vlingen <a href=\"https:\/\/www.infralighterawards.se\/\" target=\"_blank\" rel=\"noopener\">InfraLIGHTer Awards<\/a> f\u00f6rra \u00e5ret.<\/p>\n<p>Ett av bidragen var BIFROST, en nyskapande brol\u00f6sning i tr\u00e4 som var ett samarbete mellan ingenj\u00f6rer, arkitekter, h\u00f6gskola och Stockholms stad. BIFROST vann ocks\u00e5 t\u00e4vlingen. En av deltagarna i det vinnande teamet var konsultf\u00f6retaget <a href=\"https:\/\/www.linkedin.com\/company\/tbs-timber-bridge-specialists-ab\/\" target=\"_blank\" rel=\"noopener\">TBS Timber Bridge Specialists<\/a>.<\/p>\n<blockquote>\n<p>Vi tog fram en modul\u00e4r tr\u00e4brokonstruktion d\u00e4r varje del \u00e4r omkring fyra meter, ber\u00e4ttar Kristoffer Ekholm p\u00e5 TBS. D\u00e5 underl\u00e4ttas b\u00e5de ink\u00f6p och transporten till byggplatsen och konstruktionen blir ocks\u00e5 materialeffektiv. Vid en eventuell reparation byter man ut de skadade delarna utan att riva bron och det beh\u00f6vs inga specialmaskiner. Livsl\u00e4ngden f\u00f6rl\u00e4ngs och minskar resursutnyttjandet av naturtillg\u00e5ngen tr\u00e4, som ocks\u00e5 \u00e4r klimatsmart och ger en estetisk tilltalande form.<\/p>\n<\/blockquote>\n<p><img decoding=\"async\" class=\"lazyload aligncenter wp-image-34033\" src=\"https:\/\/strusoft.com\/wp-content\/uploads\/2023\/03\/BIFROST-i-FEM-Design.jpg\" data-orig-src=\"https:\/\/strusoft.com\/wp-content\/uploads\/2023\/03\/BIFROST-i-FEM-Design.jpg\" alt=\"Rendering av ber\u00e4kningsmodell f\u00f6r BIFROST i FEM-Design. Bild: TBS.\" width=\"907\" height=\"526\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%27907%27%20height%3D%27526%27%20viewBox%3D%270%200%20907%20526%27%3E%3Crect%20width%3D%27907%27%20height%3D%27526%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/strusoft.com\/wp-content\/uploads\/2023\/03\/BIFROST-i-FEM-Design-300x174.jpg 300w, https:\/\/strusoft.com\/wp-content\/uploads\/2023\/03\/BIFROST-i-FEM-Design-768x445.jpg 768w, https:\/\/strusoft.com\/wp-content\/uploads\/2023\/03\/BIFROST-i-FEM-Design.jpg 907w\" data-sizes=\"auto\" data-orig-sizes=\"(max-width: 907px) 100vw, 907px\" \/><\/p>\n<p style=\"text-align: center;\">Rendering av ber\u00e4kningsmodell f\u00f6r BIFROST i FEM-Design. Bild: TBS.<\/p>\n<h3><strong>Sinnrik konstruktion<\/strong><\/h3>\n<p>Sedan BIFROST kammade hem vinsten arbetar Kristoffer och hans tre medarbetare med att realisera konceptet till en s\u00e4ljbar produkt. Bron \u00e4r 40 meter l\u00e5ng och best\u00e5r till st\u00f6rsta delen av tr\u00e4, limtr\u00e4balkar, och resterande delar av st\u00e5l. Farbanan best\u00e5r av trapetsprofilerad st\u00e5lpl\u00e5t, ocks\u00e5 i fyra meters l\u00e4ngder, och \u00e4r tr\u00e4bekl\u00e4dd. F\u00f6r att stabilisera konstruktionen finns ett antal detaljer i st\u00e5l, till exempel vindkryss och dragstag. Valet av pl\u00e5t i farbanan minskar brons vikt och klarar l\u00e5nga sp\u00e4nnvidder och h\u00f6ga laster med liten m\u00e4ngd st\u00e5l.<\/p>\n<p>F\u00f6r att ber\u00e4kna lastp\u00e5verkan analyserade Kristoffer konstruktionen i FEM-Design, till exempel statiska ber\u00e4kningar av snittkrafter och dynamiska analyser av brons egenfrekvens, som anv\u00e4nts till underlag f\u00f6r dimensionering och kontroll mot standarder och normer.<\/p>\n<p>P\u00e5 en bro med trafik uppst\u00e5r hela tiden r\u00f6rliga laster d\u00e4r varje element p\u00e5verkas olika mycket och uts\u00e4tts f\u00f6r en varierande m\u00e4ngd drag- och trycklaster samt b\u00f6jmoment. D\u00e4rf\u00f6r m\u00e5ste analysen ske av hela konstruktionen och inte varje del f\u00f6r sig.<\/p>\n<blockquote>\n<p>Jag har skapat egna unika sammansatta tv\u00e4rsnitt i FEM-Design, ber\u00e4ttar Kristoffer. D\u00e5 f\u00e5r jag ett effektivt s\u00e4tt att bygga upp modellen med hj\u00e4lp av tv\u00e4rsnitten, till exempel av sammansatta limtr\u00e4balkar i olika konfigurationer.<\/p>\n<\/blockquote>\n<h3><strong>Sekundsnabb FEM-analys<\/strong><\/h3>\n<p>Det leder till ett effektivare arbetsfl\u00f6de. Men det \u00e4r ocks\u00e5 sj\u00e4lva analysen som gav tidsvinster.<\/p>\n<blockquote>\n<p>Det g\u00e5r v\u00e4ldigt, v\u00e4ldigt fort att k\u00f6ra analyser p\u00e5 bron, konstaterar Kristoffer. En analys med r\u00f6rliga fordonslaster tog bara 37 sekunder!<\/p>\n<\/blockquote>\n<p>Men s\u00e5 arbetade han inte med en s\u00e4rskilt komplicerad konstruktion med en m\u00e4ngd detaljer som fj\u00e4drar, kopplingar eller olinj\u00e4ra materialegenskaper.<\/p>\n<blockquote>\n<p>Med den nya versionen, <a href=\"\/sv\/blog\/blog-sv\/fem-design-22-upptack-de-manga-forbattringar-i-analys-och-design\/\">FEM-Design 22<\/a>, har ber\u00e4kningstiden f\u00f6rkortats markant. Vi l\u00e5g i startgroparna och inv\u00e4ntade den nya funktionen, att l\u00e4gga till och ta bort element i \u201dConstruction stages\u201d, som vi skulle anv\u00e4nda i ett projekt d\u00e4r vi arbetar med gamla h\u00e4ngkabelbroar i Dalarna.<\/p>\n<\/blockquote>\n<p>Ett projekt \u00e4r Sveriges l\u00e4ngsta h\u00e4ngbro i tr\u00e4 med ett spann p\u00e5 126 meter, kyrkbron i Dala-Floda, som Kristoffer och hans medarbetare analyserar inf\u00f6r kommande reparationer. Vad h\u00e4nder med bron om n\u00e5gon tr\u00e4del plockas bort och ska ers\u00e4ttas med en ny, vad h\u00e4nder i sp\u00e4nnkablarna, med farbanan, kommer den att glida is\u00e4r? N\u00f6dv\u00e4ndiga fr\u00e5gor som ger v\u00e4gledande svar i programmet f\u00f6r Kristoffer och en av medarbetarna som k\u00f6r analyserna.<\/p>\n<p><img decoding=\"async\" class=\"lazyload aligncenter wp-image-34042\" src=\"https:\/\/strusoft.com\/wp-content\/uploads\/2023\/03\/BIFROST-i-FEM-Design-2-1024x532.jpg\" data-orig-src=\"https:\/\/strusoft.com\/wp-content\/uploads\/2023\/03\/BIFROST-i-FEM-Design-2-1024x532.jpg\" alt=\"Normalkraftsf\u00f6rdelning av ber\u00e4kningsresultat f\u00f6r BIFROST i FEM-Design. Bild: TBS.\" width=\"907\" height=\"471\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%27907%27%20height%3D%27471%27%20viewBox%3D%270%200%20907%20471%27%3E%3Crect%20width%3D%27907%27%20height%3D%27471%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/strusoft.com\/wp-content\/uploads\/2023\/03\/BIFROST-i-FEM-Design-2-300x156.jpg 300w, https:\/\/strusoft.com\/wp-content\/uploads\/2023\/03\/BIFROST-i-FEM-Design-2-768x399.jpg 768w, https:\/\/strusoft.com\/wp-content\/uploads\/2023\/03\/BIFROST-i-FEM-Design-2-1024x532.jpg 1024w, https:\/\/strusoft.com\/wp-content\/uploads\/2023\/03\/BIFROST-i-FEM-Design-2.jpg 1383w\" data-sizes=\"auto\" data-orig-sizes=\"(max-width: 907px) 100vw, 907px\" \/><\/p>\n<p style=\"text-align: center;\">Normalkraftsf\u00f6rdelning av ber\u00e4kningsresultat f\u00f6r BIFROST i FEM-Design. Bild: TBS.<\/p>\n<h3><strong>Enkelt ta fram kundanpassade brovarianter med API<\/strong><\/h3>\n<p>BIFROST \u00e4r en modul\u00e4r brol\u00f6sning som kan utformas p\u00e5 olika s\u00e4tt efter kundens behov, lyfter Kristoffer fram. Brons b\u00e5ge kan placeras under eller \u00f6ver farbanan i en under- eller \u00f6versp\u00e4nd konstruktion, bron kan ha olika l\u00e4ngd, bredd och h\u00f6jd och farbanan kan ha annat material \u00e4n st\u00e5lpl\u00e5t och liknande egenskaper. D\u00e5 uppst\u00e5r en m\u00e4ngd varianter d\u00e4r ingenj\u00f6rerna p\u00e5 TBS kommer att dra nytta av FEM-Designs API.<\/p>\n<blockquote>\n<p>Vi arbetar nu med att parametrisera BIFROST-projektet f\u00f6r att vi l\u00e4ttare kan ta fram en kundspecifik l\u00f6sning med Grashopper, Rhino och API:et. D\u00e5 kommer vi erbjuda v\u00e5r brol\u00f6sning till marknaden p\u00e5 ett l\u00e4tthanterligt s\u00e4tt. Vi ser en j\u00e4ttepotential att kunna parametrisera p\u00e5 det h\u00e4r s\u00e4ttet.<\/p>\n<\/blockquote>\n<p>\u00c4ven om TBS inte har haft FEM-Design s\u00e4rskilt l\u00e4nge i sitt programbibliotek, har de p\u00e5 kort tid f\u00e5tt god kontakt med StruSofts programutvecklare.<\/p>\n<blockquote>\n<p>De \u00e4r lyh\u00f6rda och lyssnar till v\u00e5ra f\u00f6rb\u00e4ttringsf\u00f6rslag, till exempel tolkning av l\u00e5ngtidsdeformationer i tr\u00e4.<\/p>\n<\/blockquote>\n<p>En god relation som bidrar till att FEM-Design blir ett \u00e4nnu effektivare redskap f\u00f6r anv\u00e4ndarna och f\u00f6r TBS p\u00e5 sin resa f\u00f6r att cyklister och fotg\u00e4ngare, \u00e4ven bilister och kollektivresen\u00e4rer, l\u00e4ttare ska kunna ta sig fram p\u00e5 vackra och funktionella tr\u00e4broar.<\/p>\n<h3><strong>Kundportr\u00e4tt<\/strong><\/h3>\n<p><img decoding=\"async\" class=\"lazyload wp-image-34051 size-medium alignnone\" src=\"https:\/\/strusoft.com\/wp-content\/uploads\/2023\/03\/Kristoffer-Ekholm-300x300.jpg\" data-orig-src=\"https:\/\/strusoft.com\/wp-content\/uploads\/2023\/03\/Kristoffer-Ekholm-300x300.jpg\" alt=\"Kristoffer Ekholm. Bild: TBS.\" width=\"300\" height=\"300\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%27300%27%20height%3D%27300%27%20viewBox%3D%270%200%20300%20300%27%3E%3Crect%20width%3D%27300%27%20height%3D%27300%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/strusoft.com\/wp-content\/uploads\/2023\/03\/Kristoffer-Ekholm-150x150.jpg 150w, https:\/\/strusoft.com\/wp-content\/uploads\/2023\/03\/Kristoffer-Ekholm-300x300.jpg 300w, https:\/\/strusoft.com\/wp-content\/uploads\/2023\/03\/Kristoffer-Ekholm.jpg 502w\" data-sizes=\"auto\" data-orig-sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<p><a href=\"https:\/\/www.linkedin.com\/in\/kristoffer-ekholm-77728149\/\" target=\"_blank\" rel=\"noopener\">Kristoffer Ekholm<\/a>. Bild: TBS.<\/p>\n<p>Kristoffer Ekholm \u00e4r civilingenj\u00f6r och teknologie doktor vid Chalmers tekniska h\u00f6gskola. Han disputerade inom konstruktionsteknik med inriktning mot tv\u00e4rsp\u00e4nda tr\u00e4broplattor.<\/p>\n<p>Under utbildningen till civilingenj\u00f6r v\u00e4xte Kristoffers intresse f\u00f6r finita elementber\u00e4kningar. Han \u00e4gnade stor del av doktorandstudierna till olika FE-ber\u00e4kningar, fr\u00e5n komplexa olinj\u00e4ra solidmodeller till enklare linj\u00e4ra plattanalyser. D\u00e4refter har han utvecklat egna ber\u00e4kningsrutiner f\u00f6r r\u00f6rliga laster p\u00e5 ortotropa plattor.<\/p>\n<p>Efter examen har Kristoffer arbetat som brokonstrukt\u00f6r p\u00e5 V\u00e4gverket Konsult, Vectura och WSP och varit projektledare f\u00f6r projekteringen av Hisingsbron p\u00e5 G\u00f6teborgs stad. Han \u00e4r medgrundare och VD f\u00f6r konsultf\u00f6retaget TBS Timber Bridge Specialists AB, som anv\u00e4nder FEM-Design som ett av sina prim\u00e4ra analysverktyg.<\/p>\n<p>Teamet f\u00f6r BIFROST best\u00e5r ut\u00f6ver TBS Timber Bridge Specialists AB av <a href=\"https:\/\/www.byv.kth.se\/institutionen-for-byggvetenskap-1.779525\" target=\"_blank\" rel=\"noopener\">KTH\/Institutionen f\u00f6r Byggvetenskap<\/a>, <a href=\"https:\/\/funkia.se\/\" target=\"_blank\" rel=\"noopener\">Funkia AB<\/a>, <a href=\"https:\/\/gaiaark.se\/\" target=\"_blank\" rel=\"noopener\">Gaia Arkitektur AB<\/a>, <a href=\"https:\/\/start.stockholm\/om-stockholms-stad\/organisation\/fackforvaltningar\/trafikkontoret\/\" target=\"_blank\" rel=\"noopener\">Trafikkontoret<\/a> och <a href=\"https:\/\/start.stockholm\/\" target=\"_blank\" rel=\"noopener\">Stockholms stad<\/a>.<\/p>\n<pre>\u00a9 Love Janson<\/pre>\n<\/div><div class=\"fusion-separator fusion-full-width-sep\" style=\"align-self: center;margin-left: auto;margin-right: auto;margin-top:40px;margin-bottom:20px;width:100%;\"><div class=\"fusion-separator-border sep-single sep-solid\" style=\"--awb-height:20px;--awb-amount:20px;border-color:var(--awb-color3);border-top-width:1px;\"><\/div><\/div><\/div><\/div><\/div><\/div><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-2 fusion-flex-container has-pattern-background has-mask-background nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"max-width:1424.8px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-1 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-separator fusion-full-width-sep\" style=\"align-self: center;margin-left: auto;margin-right: auto;margin-top:0px;margin-bottom:20px;width:100%;\"><div class=\"fusion-separator-border sep-single sep-solid\" style=\"--awb-height:20px;--awb-amount:20px;border-color:var(--awb-color3);border-top-width:1px;\"><\/div><\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-2 fusion_builder_column_2_3 2_3 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:66.666666666667%;--awb-margin-top-large:0px;--awb-spacing-right-large:2.88%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:2.88%;--awb-width-medium:66.666666666667%;--awb-order-medium:0;--awb-spacing-right-medium:2.88%;--awb-spacing-left-medium:2.88%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-text fusion-text-2\" style=\"--awb-font-size:26px;--awb-text-transform:none;--awb-text-color:#30bc9c;--awb-margin-top:20px;--awb-text-font-family:&quot;Alwyn New Bold&quot;;--awb-text-font-style:normal;--awb-text-font-weight:400;\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-2 fusion_builder_column_2_3 2_3 fusion-flex-column\">\n<div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\">\n<div class=\"fusion-text fusion-text-6\">\n<h2 class=\"fusion-responsive-typography-calculated\" data-fontsize=\"28\" data-lineheight=\"33.6px\">Get started with FEM-Design by clicking the Get a Free Trial button.<\/h2>\n<\/div>\n<\/div>\n<\/div>\n<\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-3 fusion_builder_column_1_3 1_3 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:33.333333333333%;--awb-margin-top-large:0px;--awb-spacing-right-large:5.76%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:5.76%;--awb-width-medium:33.333333333333%;--awb-order-medium:0;--awb-spacing-right-medium:5.76%;--awb-spacing-left-medium:5.76%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow 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