New UHPFRC bridges in the Czech Republic

[摘要] This paper deals with new UHPFRC (Ultra High Performance Fibre Reinforced Concrete) bridges produced or constructed in 2018 in the Czech Republic. The paper includes a short description of 3 unique pedestrian bridges with load bearing structure made of UHPFRC and 2 steel bridges over the railway track with lost formwork for bridge decks and cornices made of thin UHPFRC slabs. Focus is given on the testing of the material, comparison of test specimens and summary of results from UHPFRC production in real scale. The size effect of control specimen and the results analysis is given in the last chapter. The 3 mentioned unique pedestrian bridges are Footbridge over the Lubina river in city Píbor, Pedestrian and cycle bridge in the vicinity of Black Bridges in city Tábor and Footbridge over Detovice stream in Vrapice - a district of Kladno city. Thin panels as permanent lost formwork for two bridges over the railway tracks are in city Perov. All new UHPFRC structures should be worthy of attention of bridge experts and community of specialists in the field of concrete engineering.

[发布机构] KŠ PREFA S.r.o., Jinonická 805/57, Praha 5-Koíe; 150 00, Czech Republic^1;Klokner Institute, Czech Technical University in Prague, Šolínova 7, Praha 6-Dejvice; 160 00, Czech Republic^2;Pontex Consulting Engineers, Ltd., Bezová 1658, Praha 4-Braník; 147 00, Czech Republic^3;NOVÁK and PARTNER, V Olinách 2300/75, Praha-Stranice; 100 00, Czech Republic^4

[学科分类] 土木及结构工程学

[关键词] Concrete engineering;Czech Republic;Formwork;Loadbearing structure;Railway track;Size effects;Test specimens;Ultra high performance fibre reinforced concretes