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8.
PRECA ST CONCRETE STRUCTURES
8. 1.
INTRODUCTION
- econom economy y of of timb timber er scaff scaffold olding ing;; - high qu quality; - no wea weath ther er pro probl blem ems; s; - the the pres prestr tres essi sing ng is sui suita tabl ble. e.
-
DISADVANTAGES
- necessity necessity of special special mechanica mechanicall devices devices (liftin (lifting g cranes cranes …); …); -
, transport, lifting, positioning, final state;
- functi functiona onall flexib flexibili ility ty is rest restrai rained ned.. Lect. Dr. Dr. S Sorin orin DAN
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Reinforced Reinforced and Prestressed Prestressed Concrete Concrete Structures
8.
PRECA ST CONCRETE STRUCTURES
8.2.
SINGL E-STOREY STRUCTURES
- linear - frames - part parts s of fram frames es -
L INEAR PRECAST ELEMENTS ELEMENTS
Lect. Dr. Sorin DAN Reinfor Reinfor ced and Prestressed Concr Concr ete Struc Struc tures
Lect. Dr. Sorin DAN Reinfor Reinfor ced and Prestressed Concr Concr ete Struc Struc tures
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8.
PRECA ST CONCRETE STRUCTURES
8.2.
SINGL E-STOREY STRUCTURES
- Roof Roof made made of of surfa surface ce elem element ents: s: - caissons; - TT elements; - hol hollow low stri strips ps.. - Stat Static ic out outli line ne:: - fixed fixed column columns s + hinged hinged beams; beams; - fixed fixed column columns s + fixed fixed beams. beams.
Made of spatial elements: - floors floors made made of slabs+ slabs+edge edge ribs ribs supp support orted ed by by colu columns mns;; - floors floors made made of slabs directly directly suppor supported ted by columns. columns. Lect. Dr. Sorin DAN Reinfor Reinfor ced and Prestressed Concr Concr ete Struc Struc tures
Lect. Dr. Sorin DAN Reinfor Reinfor ced and Prestressed Concr Concr ete Struc Struc tures
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8.
PRECA ST CONCRETE STRUCTURES
8.4.
PRECA ST EL EMENTS
- caisson; - TT and and T (str (strai aigh ghtt or curv curved ed); ); - holl hollow ow stri strips ps;; - cellu cellula larr concre concrete te pane panels ls..
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Reinforced Reinforced and Prestressed Prestressed Concrete Concrete Structures
8.
PRECA ST CONCRETE STRUCTURES
8.4.
PRECA ST EL EMENTS
– 2 – T str strai aigh ghtt – 4 – TT str straigh aightt – 6 – U ele eleme ment nts s 7 – thin shells
Lect. Dr. Dr. S Sorin orin DAN Reinforced Reinforced and Prestressed Prestressed Concrete Concrete Structures
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8.
PRECA ST CONCRETE STRUCTURES
8.5.
J OINTS
- Func Functi tion on of man manuf ufac actu ture re:: - Wet joints: joints: welded welded or lapped lapped reinforcem reinforcement ent + cast inplace concrete; continuous joints. - Dry joints: joints: welding welding of embedded embedded steel steel shapes + protection concrete. - Mixed joints: joints: combina combination tion of of the the previous previous two. - Pres Prestr tres esse sed d oint oints: s: cont contin inuo uous us oint oints. s. - Rigid joints - Hinges - Partially rigid Lect. Dr. Dr. S Sorin orin DAN
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Reinforced Reinforced and Prestressed Prestressed Concrete Concrete Structures
8.
PRECA ST CONCRETE STRUCTURES
-
8.5.
J OINTS
–
monolithic concrete
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8.
PRECA ST CONCRETE STRUCTURES
-
8.5.
J OINTS
–
Lect. Dr. Dr. S Sorin orin DAN
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Reinforced Reinforced and Prestressed Prestressed Concrete Concrete Structures
8.
PRECA ST CONCRETE STRUCTURES
-
8.5.
J OINTS
–
hinged joint
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8.
PRECA ST CONCRETE STRUCTURES
-
8.5.
J OINTS
–
Exterior node:
mortar
stirrup
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Reinforced Reinforced and Prestressed Prestressed Concrete Concrete Structures
8.
PRECA ST CONCRETE STRUCTURES
-
8.5.
J OINTS
–
Interior node:
mor mor ar
stirrup
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8.
PRECA ST CONCRETE STRUCTURES
-
8.5.
J OINTS
–
Column Column – truss truss node: node:
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Reinforced Reinforced and Prestressed Prestressed Concrete Concrete Structures
8.
PRECA ST CONCRETE STRUCTURES
-
8.5.
J OINTS
–
For multi-storey structures: Edge column Rubber or steel ring
Steel bar
Steel plate
Central column
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8.
PRECA ST CONCRETE STRUCTURES
-
8.5.
J OINTS
–
1 – seco second ndar ary y beam beam 2 – mort ortar 3 – prim primar ary y bea beam m
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Reinforced Reinforced and Prestressed Prestressed Concrete Concrete Structures
8.
PRECA ST CONCRETE STRUCTURES
-
8.5.
J OINTS
–
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8.
PRECA ST CONCRETE STRUCTURES
8.5.
J OINTS
Caisson joints: 1 – cais caisso son n 2 – mort mortar ar 3 – beam
Lect. Dr. Dr. S Sorin orin DAN
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Reinforced Reinforced and Prestressed Prestressed Concrete Concrete Structures
8.
PRECA ST CONCRETE STRUCTURES
8.5.
J OINTS
– , – 3 – stir stirru rups ps
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8.
PRECA ST CONCRETE STRUCTURES
8.6.
DESIGN
Ex.: at lifting
different static diagrams:
Lect. Dr. Dr. S Sorin orin DAN Reinforced Reinforced and Prestressed Prestressed Concrete Concrete Structures