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V voji a praktick mu uplatn n materi lu UHPC je st le v nov no velk mno stv pozornosti Kotven v tomto modern m kompozitn m materi lu p edstavuje d le itou sou st komplexn problematiky navrhov n a realizace prefabrikovan ch konstrukc z UHPC Pr ce se zam uje na vlastnosti kotven v prvc ch z materi lu UHPC C lem pr ce je proveden experiment ln ho v zkumu kotevn ch oblast pomoc kter ho budou bl e pops ny mo nosti kotven v UHPC Bylo provedeno t m 250 experiment ln ch zkou ek pomoc kter ch byla zkoum na problematika kotevn ch oblast a kotven v UHPC obecn Praktick mu ov ov n p edch zelo podrobn studium sou asn ho stavu e en problematiky kter p edstavovalo zkoum n st vaj c ch p stup k navrhov n a hodnocen kotven kter byly n sledn konfrontov ny s materi lem UHPC co do z kladn ch princip vlastnost a v robn ch a technologick ch postup Byly provedeny t i experiment ln programy zam en na vlastnosti kter v znamnou m rou ovliv uj kotven v UHPC Zkou ky tenk ch desek s kotevn mi rouby pomoc kter ch lze popsat parametry kotven typ a tvar kotevn ch p pravk sm r p sob c ho zat en po et kotevn ch p pravk Zkou ky kotevn oblast se zam en m na sledov n vlivu rozd ln ho mno stv dr tk vf efektivn hloubky zapu t n kotevn ch prost edk hef a polohy kotevn ho prost edku vzhledem ke sm ru beton e na v sledn vlastnosti kotevn ch oblast Ov en kotevn ch oblast prvku se skute n mi okrajov mi podm nkami jako re ln dimenze konstrukce vyztu en b nou v ztu a technologie v roby V sledkem anal z jsou po etn vztahy pro v po et nosnosti kotven zahrnuj c r zn vlivy souvisej c s UHPC P i zkou en byl kladen d raz na uplatn n v sledk a jejich p esahy do praktick ho navrhov n a prov d n Experimenty vych z z pou it p edem zabudovan ch kotevn ch p pravk variantn ho proveden pro prefabrikovan prvky More and more attention is being paid to the development and practical application of UHPC material Anchorage in this modern composite material is an important part of the complex issue of the design and implementation of prefabricated structures made of UHPC This thesis focuses on anchorage properties in UHPC elements The aim of the thesis is to carry out experimental research on anchorage and therefore further describe the possibilities of anchoring in UHPC Nearly 250 experimental tests have been carried out to investigate the problems of anchorage areas and anchorage in UHPC in general Practical verification was preceded by a detailed study of the current state of the field and consisted of an investigation of existing approaches to designing and evaluating anchorages which were then analyzed side by side with UHPC material in terms of basic principles and properties as well as manufacturing and technological procedures Three experimental programs were carried out focusing on properties that significantly affect anchorage in UHPC These properties were thin plates with anchor bolts which can be used to describe anchorage parameters the type and shape of anchors direction of applied load the number of anchors anchorage areas focusing on monitoring the effect of different amounts of fibers vf the effective depth of embedment of anchors hef and the position of the anchor relative to the direction of concreting on the resulting properties the anchorage of an element with real boundary conditions such as the realistic dimensions of the structure reinforced with conventional reinforcement and fabrication technology The analysis shows numerical relationships for calculating anchorage capacity while incorporating various UHPC related effects Testing emphasized the application of the results and their transfer to practical design and implementation The experiments are based on the use of cast-in anchors for precast elements

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Kotevní oblasti v UHPC / Anchorage in UHPC

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