Višesmjerno vlačno ispitivanje dvoosnih geomreža

master's thesis

• Title (english): Multi-directional tensile test of biaxial geogrids
• Author: Lucija Krsmanović
• Mentor: Tatjana Rukavina (mentor)
• Committee member: Saša Ahac (predsjednik povjerenstva)
• Committee member: Tatjana Rukavina (član povjerenstva)
• Committee member: Ivica Stančerić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Civil Engineering; (Transportation Engineering); Zagreb
• Defense date and country: 2020-07-09, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Civil Engineering; Transportation

Abstract

Primjena geomreža može biti ekonomično te tehnološki i ekološki kompatibilno rješenje tradicionalnim metoda poboljšanja nosivosti kolničke konstrukcije. Danas je na tržištu dostupan širok spektar geomreže, a dostupni proizvodi razlikuju se prema tehnologiji proizvodnje, veličini i obliku otvora, vlačnim svojstvima itd. Prilikom odabira geomreže za određeni projekt uobičajeno se razmatraju dva svojstva, veličinu otvora i vlačnu čvrstoću, a u novije i omjer radijalne sekantne krutosti pri malim deformacijama. Određivanje omjera radijalne sekantne krutosti zahtijeva mjerenje vlačne čvrstoće u najmanje četiri smjera. Uvođenjem novih smjerova ispitivanja zahtijeva modifikaciju ispitivanja koje se tradicionalno provodi prema normi HRN EN ISO 10319. U diplomskom radu su detaljno opisane metode ispitivanja vlačnih svojstava za dvoosne i troosne geomreže. Uspostavljen je novi postupak ispitivanja dvoosnih geomreža modifikacijom norme HRN EN ISO 10319 s obzirom na specifičnosti višesmjernog ispitivanja. Prema uspostavljenom postupku provedena su ispitivanja vlačnih svojstava na dvije dvoosne geomreže proizvedene postupkom zavarivanja za sedam ispitnih smjerova (0°, 15°, 30°, 45°, 60°, 75° i 90°).

Abstract (english)

Application of geogrids can be economical yet technically and environmentally compatible solution to traditional methods of improving pavement bearing capacity. Today, wide range of geogrid products is available in the market. Available products vary in manufacturing technique, aperture size and shape, tensile properties etc. When selecting the geogrid for a specific project most contractors consider aperture size and tensile strength and more recently new the radial secant stiffness ratio at low strain. Calculation of radial secant stiffness ratio requires determination of tensile strength in minimum of four directions. Introduction of new testing directions demands adjusting test procedure which is traditionally carried out in accordance with HRN EN ISO 10319. In this masters thesis test methods for determination of tensile properties are described. A new procedure for testing biaxial geogrids has been established by modifying the HRN EN ISO 10319 standard regarding the specifics of multidirectional testing. According to the established procedure, tensile properties were tested on two biaxial geogrids produced by the welding process for seven test directions (0 °, 15 °, 30 °, 45 °, 60 °, 75 ° and 90 °).

• Keywords: prometnice
• Keywords (english): roads
• Language: croatian
• URN:NBN: urn:nbn:hr:237:137479
• Study programme: Title: Civil Engineering; specializations in: Construction Management, Transportation Engineering, Geotechnical Engineering, Hydraulic Engineering, Structural Engineering, Construction Materials, Theory and Modeling of Structures; Course: Construction Management; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka građevinarstva (magistar/magistra inženjer/inženjerka građevinarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2020-11-26 07:02:16