A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
New structural joint by rebar looping applied to staged box girder bridge construction: static tests
This paper shows the design, development and experimental checking of a modified type of structural joint with limited length between concrete segments cast “in-situ”. The design concept is based on the development length of an anchorage hook stiffened by transverse reinforcement bars and is particularly suited for the case of in-situ construction of staged box girder bridges, seeking to the possibility of using lighter scaffolding. The studies focusing on the strength, stiffness and serviceability of the proposed joint are presented. The research work comprises the bending behaviour of reinforced concrete slabs with loop joints with regard to the diameter of loop bar, loop joint width and ultimate and fatigue load. The results are compared to the behaviour of reinforced concrete slabs without joints. A total of 16 slabs were tested by static and fatigue loading tests. The present paper evaluates the flexural behaviour under static loading test. The results of fatigue tests have also shown an excellent performance. In the static tests, crack width and crack pattern were observed at service load levels, and the ultimate behaviour was evaluated by means of up to failure tests. From the test results, the service performance of the loop joints was confirmed similar to slabs without joints. The static loading tests confirm the good performance and effectiveness of this loop joint type under static loads. Details of loop joints design criteria are also suggested. ; Peer Reviewed ; Postprint (author's final draft)
New structural joint by rebar looping applied to staged box girder bridge construction: static tests
This paper shows the design, development and experimental checking of a modified type of structural joint with limited length between concrete segments cast “in-situ”. The design concept is based on the development length of an anchorage hook stiffened by transverse reinforcement bars and is particularly suited for the case of in-situ construction of staged box girder bridges, seeking to the possibility of using lighter scaffolding. The studies focusing on the strength, stiffness and serviceability of the proposed joint are presented. The research work comprises the bending behaviour of reinforced concrete slabs with loop joints with regard to the diameter of loop bar, loop joint width and ultimate and fatigue load. The results are compared to the behaviour of reinforced concrete slabs without joints. A total of 16 slabs were tested by static and fatigue loading tests. The present paper evaluates the flexural behaviour under static loading test. The results of fatigue tests have also shown an excellent performance. In the static tests, crack width and crack pattern were observed at service load levels, and the ultimate behaviour was evaluated by means of up to failure tests. From the test results, the service performance of the loop joints was confirmed similar to slabs without joints. The static loading tests confirm the good performance and effectiveness of this loop joint type under static loads. Details of loop joints design criteria are also suggested. ; Peer Reviewed ; Postprint (author's final draft)
New structural joint by rebar looping applied to staged box girder bridge construction: static tests
Villalba Herrero, Sergi (author) / Casas Rius, Joan Ramon (author) / Universitat Politècnica de Catalunya. Departament d'Enginyeria de Projectes i de la Construcció / Universitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental / Universitat Politècnica de Catalunya. GRIC - Grup de Recerca i Innovació de la Construcció / Universitat Politècnica de Catalunya. EC - Enginyeria de la Construcció
2016-04-01
Article (Journal)
Electronic Resource
English
staged construction , crack , Formigó -- Proves , bridge construction , Juntures (Enginyeria) , box girder , Joints (Engineering)--Testing , static test , Àrees temàtiques de la UPC::Enginyeria civil::Materials i estructures , Loop joint , Ponts -- Disseny i construcció , Concrete--Testing , Bridges--Design and construction
DDC:
690
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