摘要:
A copper-based alloy which contains 7.8 to 8.8 mass% of Al, 7.2 to 14.3 mass% of Mn and a remainder made up by Cu and unavoidable impurities, has a largest crystal grain diameter of more than 8 mm, has good shape memory properties, and enables the production of a structural material having a cross-section size suitable for use as a structure body or the like; and a structural material comprising the copper-based alloy. The copper-based alloy may additionally contain at least one element selected from the group consisting of Ni, Co, Fe, Ti, V, Cr, Si, Ge, Nb, Mo, W, Sn, Bi, Sb, Mg, P, Be, Zr, Zn, B, C, S, Ag and a misch metal in the total amount of 0.001 to 5 mass%.
摘要:
Anordnung zum kraftschlüssigen Anschluss eines Bauteils (4) an einen Baukörper (1) mit mindestens zwei Kraftübertragungsbereichen (6), die in seitlichem Abstand voneinander angeordnet sind. In den Kraftübertragungsbereichen (6) sind jeweils ein oder mehrere Spannelemente (17) angeordnet, die sich vom Bauteil (4) in den Baukörper (1) erstrecken. Um Relativbewegungen des Bauteils (4) gegenüber dem Baukörper (1) trotz der vorhandenen Spannkräfte und damit Reibkräfte in der Kontaktfuge zu ermöglichen, besitzt der Baukörper (1) in mindestens einem der Kraftübertragungsbereiche (6) eine erste Lagerfläche (9) zur Aufnahme vertikaler Druckkräfte aus dem Bauteil (4) und eine zweite Lagerfläche (8,10) zur Aufnahme von Druckkräften in Spannrichtung der Spannelemente (17) und das Bauteil (4) eine mit der ersten Lagerfläche (9) zusammenwirkende erste Auflagerfläche (14) und eine mit der zweiten Lagerfläche (8,10) zusammenwirkende zweite Auflagerfläche (13,15). Dabei bilden die erste Lagerfläche (9) und zweite Lagerfläche (8,10) mit den damit zusammenwirkenden Auflagerflächen (13,14,15) in der Anschlussfuge (16) ein Gleitlager aus.
摘要:
An anchorage system is provided which includes: a composite tendon (2) comprising an assembly of elongate elements (4, 5) held together and an anchor head including a casing (6). The individual elongate elements (4, 5) are separated from each other at one end extending into the anchor head, and the anchor head casing (6) is filled with an adhesive medium (10) to secure the separated elements (4, 5) in the casing (6). A method for installing an anchorage system is also provided including the steps of: inserting in a borehole at least one composite tendon (2) comprising an assembly of elongate elements (4, 5) held together; separating the individual elongate elements (4, 5) from each other over a pre-determined bonded anchor head length (22); placing an anchor head casing (6) around the separated elements (4, 5); and filling the anchor head casing (6) with an adhesive medium (10), whereby once the adhesive medium has set, the separated elements (4, 5) are securely fixed into the anchor head (6).
摘要:
Procédé de vidange d'un système d'ancrage (1) d'un câble de structure (2a, 2b, 2c) à un élément de construction (7), le système d'ancrage comprenant une première chambre (3) délimitée par une enveloppe (4, 5, 6), la première chambre contenant une première partie (2aa, 2bb, 2cc) du câble de structure et une première matière de remplissage, le procédé comprenant les étapes suivantes : insertion d'au moins un élément chauffant (10a, 10b) au sein de la première matière de remplissage par une ouverture (4a, 4b) de l'enveloppe de la première chambre ; chauffage de la première matière de remplissage à l'aide de l'élément chauffant pour fluidifier tout ou partie de la première matière de remplissage ; et extraction de la première matière de remplissage fluidifiée par une ouverture (4a, 4b) de l'enveloppe de la première chambre.
摘要:
A chair for supporting an edgelift anchor for use in lifting a concrete component, said anchor comprising a head portion engagable with a clutch of a lifting system, and a body portion for embedment with the concrete component, wherein the chair has surfaces configured for supporting the edgelift anchor relative to a casting surface during casting of the concrete component.
摘要:
L'invention concerne un élément de construction préfabriqué (1), comportant au moins un bloc creux (2), l'élément (1) étant de forme générale allongée et étant équipé d'au moins une barre de précontrainte (6, 7) s'étendant longitudinalement dans le bloc creux (2), la barre de précontrainte (6, 7) comportant en outre une première et une seconde extrémités équipées respectivement d'une première et d'une seconde plaques (16), s'appuyant respectivement sur une première et une seconde extrémités (18, 19) de l'élément (1) de manière à le contraindre, caractérisé en ce que chaque plaque (16) est équipée de moyens de fixation de l'extrémité correspondante de la barre de précontrainte (6, 7), s'étendant vers l'intérieur du bloc (2).
摘要:
The structural cable (2) to be anchored, such as a main suspension cable or a stay cable, is made of a compact bundle of parallel metallic wires. The cable wires are distributed into seven-wire units (18) in a portion of the cable adjacent to an anchor block (13), and these seven-wire units are individually anchored on the anchor block.
摘要:
The invention relates to an anchoring (7), for at least one pre-tensioned or stressed tensile element (1), whereby the tensile force may be transmitted to an anchor body (2), by means of one or several wedges (3), comprising a wedge-shaped layer (32) which has a lower modulus of elasticity than the other parts of the anchoring (7). The greatest thickness of the wedge-shaped layer (32), measured normal to the longitudinal axis (4) of the tensile element (1), lies in the region (5) of the anchoring near the load (7). According to the invention, compression pressures may be evenly distributed over the clamping length of the tensile element (1), whereby the wedge (3) and/or the anchor body (2) is/are formed from at least two wedge-shaped adjacent layers (31, 32). At least one of said layers (32) is made from a material with a lower modulus of elasticity than the material from which the further layer(s) of the wedge (3) and/or the anchor body (2) is/are formed and the greatest thickness of said layer (32) is provided in the region near the load.
摘要:
A seal cap (10) for use in sealing an end (20) of a tendon (14) anchored to an anchor plate (12). The seal cap (10) includes a receptacle (32) for holding therein a sealing agent (37). The seal cap (10) further includes a push nut (34) that grips to the tendon end (20) when forced thereon. A foam washer (35) is held in the front part of the seal cap (10). When the seal cap (10) is forced, such as by hammering, on the end (20) of the tendon (14), the sealant is displaced onto the tendon (14), and the foam washer (35) is squeezed against the anchor plate (12). A high quality moisture seal is formed.
摘要:
A method of manufacturing a prestressed concrete, comprising the steps of passing fiber bundles (13a, 13b) extended from parallel chord carbon fiber cables (10) into a sheath (21) by folding up, installing U−shaped carbon fiber anchors (33) (flush anchor) thereto, fixing the fiber bundles with room temperature setting adhesive agent (12), after the setting of placed concrete (23), stretching the parallel chord carbon fiber cables (10) through temporary anchors (40a, 40b), setting grout material (22) filled in the sheath (21), releasing a stretching force by separating the temporary anchors (40a, 40b) to act the contractive force of the parallel chord carbon fiber cables (10) on a prestressed concrete member (20) and, when a pretension system is used, adhesively fixing a plurality of main reinforcements having the plurality of parallel chord fiber cables (10) disposed, thereon, parallel with each other and wound, thereon, with carbon fiber hoops, filling concrete while stretching the main reinforcements, and releasing the stretching force of the main reinforcements after the placed concrete (23) is set, whereby a prestressed concrete member providing excellent mechanical characteristics, fatigue strength, and corrosive resistance can be manufactured at a low cost with less looseness of the parallel chord carbon fiber cables (10) used as stretching materials and without requiring a steel anchor.