34results about How to "Improve coordination and deformation ability" patented technology

A construction method of reinforcing a large-span concrete structure with prestressed carbon fiber sheet comprises the following steps of forming bolt embedding holes on the side surface to be reinforced of the large-span concrete structure, and embedding high-strength bolts of different specifications into the bolt embedding holes through adhesive glue; fabricating stretch sheet fixing portions, stretch sheet moving portions and stretch power fixing portions; mounting the stretch sheet fixing portions, stretch sheet moving portions, stretch sheet assembling units, stretch power fixing portions and stretch power portions, wherein the stretch sheet assembling units, the stretch power fixing portions and the stretch power portions are made of carbon fiber materials; stretching stretch sheet; and removing stretching power and tightly pressing and adhering the stretch sheet onto the surface of the large-span concrete structure. The construction method of reinforcing the large-span concrete structure with the prestressed carbon fiber sheet can achieve the gapless adhesion between the prestressed stretch sheet and the concrete structure to be reinforced, facilitate the coordination of the uniform stress force of the same sections of the carbon fiber filaments of the stretch sheet, improve the integral stress performance of the prestressed carbon fiber sheet and the coordination deformation capability of the prestressed carbon fiber sheet and the concrete structure and give full play to the high-strength characters of the carbon fiber sheet.

The invention relates to a high-strength double-wall inclinometer casing for inclined displacement measurement. The high-strength double-wall inclinometer casing comprises a plurality of measuring pipe fittings, a plurality of pipe fitting connecting pieces and an axial pressure trigger self-opening type anchor hook base. The measuring pipe fittings are connected through the pipe fitting connecting pieces, the axial pressure trigger self-opening type anchor hook base is connected with the measuring pipe fitting which firstly conducts hole sinking, the measuring pipe fittings are provided with inner walls and outer walls, four concrete filling cavities of inner and outer pair arc structures are formed by the inner walls and the outer walls, a plurality of holes are formed in the outer walls, when the inclinometer casing is submerged in the bottom of drilled holes, pressure is exerted in the axial direction, the axial pressure trigger self-opening type anchor hook base is opened and is anchored to the pedestal rock, and when back filling is carried out on concrete, cement paste enters the concrete filling cavities through the holes. The inclinometer casing has the strong capability of resisting tension and pressure, resisting bending and resisting torsion, the compatible deformation capability of the inclinometer casing and the surrounding rock-soil layer is improved, the upward buoyancy of serous fluid on the inclinometer casing is reduced, and a base of the inclinometer casing and the bed rock are in the fixed connection state all the time.

The invention relates to a preparation process method of a a wide ultrathin cold-rolled titanium strip coil for rolling bonding. The preparation process method comprises that a plate blank is preparedby adopting an EB furnace die casting slab ingot through process routes and parameters such as innovation, component design optimization, plate blank preparation, cold coiling rolling, heat treatment, leveling and shape correction and the like, the surface is machined by using a large integral cutterhead, a treatment method of first performing edge cutting and then performing annealing is adoptedafter cold rolling of a mother strip, a small-tension rolling control manner is adopted in the finished product rolling stage, finished product heat treatment is carried out in a long-time heat preservation and furnace cooling cover type annealing manner, and a rolling leveling method is selected to further improve the strip shape of the annealed strip coil; the width of the prepared cold-rolledtitanium strip coil can reach 1000 mm or above, the thickness can reach 0.1-0.3 mm, the strip shape is flat and straight, the comprehensive mechanical property is excellent, the rolling bonding rate with dissimilar metal is high, and meanwhile, the cost of the composite material titanium metal can be remarkably reduced.

The invention discloses a high-strength and high-plasticity metastable-state beta-type titanium alloy and a preparation method thereof. The high-strength and high-plasticity metastable-state beta-type titanium alloy comprises the following components in percentage by weight: 11.0-12.0% of V, 5.0-6.0% of Al, 4.0-5.0% of Zr, 2.0-3.0% of Cr and the balance of Ti. After the alloy is subjected to conventional single-aging heat treatment, a secondary alpha s phase with the average size of about 10 nm can be obtained. In addition, a multi-level structure comprising a primary alpha phase and the secondary alpha s phase is constructed through two-phase region solid solution and aging heat treatment. Al and Zr elements are compounded to strengthen the alpha phase, and a V element is added to improve the plasticity of the alloy while a common beta strengthening element Cr is added to obtain extremely high strength. The yield strength of an existing metastable-state beta-type titanium alloy is improved to 1642 MPa which is unprecedented, the tensile strength is improved to 1726 MPa, and meanwhile, the ductility is 5%. Based on the characteristics, the alloy has great competitive advantages in high-strength and high-plasticity titanium alloys.

The invention discloses a concrete filled steel tubular column, H-shaped steel beam, steel support and pi type connecting piece combined center column bottom joint and a making method. The joint mainly comprises a light square steel tube recycled concrete column, H-shaped steel beams, a pi type connecting piece, web connecting plates, high-strength bolts, steel supports, I-shaped bench binding steel bars, slab column binding steel bars and a prefabricated recycled concrete floor. Compared with the prior art, the joint is simple in structure and convenient to construct, and has a clear force transferring route and two seismic fortification lines. The novel structures such as the pi type connecting piece, the bench binding steel bars and the slab column binding steel bars are creatively proposed, and integrality of slab-column-joint domain is enhanced; bending resistance, pressure resistance and stability of the joint are effectively improved; reliability of the steel support and the pitype joint connecting structure is further ensured; and the joint is firm in beam-column-support-floor connection, high in integrality and excellent in seismic performance and the key technological support is provided for engineering design of a prefabricated green housing light steel combined structure.