36results about How to "Improved seismic safety" patented technology

The invention discloses a construction method for setting inclined annular joints to improve the anti-seismic performance of the structural joints of shield tunneling segments, including several prefabricated shield tunneling segments; the construction steps are as follows: step 1, prefabricating a shield machine; the length of the casing of the shield machine and the The inclination angle of each prefabricated shield segment is matched with the extension direction of the underground shield tunnel; step 2, splicing the first ring of prefabricated shield segments; step 3, splicing the next ring of prefabricated shield segments; the next ring The prefabricated shield segment and the existing prefabricated shield segment are staggered at a certain angle to achieve longitudinal staggered joints, and an elliptical inclined circular joint is formed at the splicing surface; step 4, perform subsequent segment splicing; the shield continues to excavate, and the execution is repeated Step 3, complete the assembly of all prefabricated shield segments, and finally form a complete tunnel structure. The application of the invention can improve the shearing resistance of the shield tunnel under the action of vertical earthquake, and further improve the seismic safety performance of the shield tunnel.

The invention discloses a construction method for a high-ductility heat-insulating masonry wall. The method comprises the following steps: according to a design size of the cross section of the masonry wall, smearing a layer of high-performance masonry mortar on a position where the masonry wall is needed; paving building blocks on the high-performance masonry mortar, and smearing the high-performance masonry mortar, according to a design height of the masonry wall, completing the masonry of the wall, and curing for 7 days so that the wall reaches the initial strength; smearing a high-performance cement-based material on the surface of the completed masonry wall, and laying a fiber weaving net on the high-performance cement-based material, and smearing the high-performance cement-based material on the fiber weaving net, wetting and curing for 28 days until reaching an age of the high-performance cement-based material; and smearing polymer adhesive mortar on the high-performance cement-based material at one side, contacting with an outside natural environment, of the masonry wall, and laying a heat-insulating board on the polymer adhesive mortar, finally smearing decoration mortar on the heat-insulating board. The method is capable of effectively improving the ductility of the newly constructed masonry wall, reducing a risk that the masonry structure is seriously damaged,even collapsed, in an earthquake, effectively improving the heat-insulating performance of the newly constructed masonry wall, and reducing the construction energy consumption of the masonry wall.

The invention discloses a composite steel plate shear wall with dense ribs, which comprises a plurality of rib beams and rib columns, the plurality of rib beams and rib columns form a rectangular grid structure, each grid is provided with an embedded steel plate; a plurality of ribs Beams and rib columns are all made of reinforced concrete, reinforced concrete or all steel; multiple embedded steel plates are ordinary low carbon steel, high strength steel, low yield point steel or low yield strength aluminum; multiple embedded steel plates are in the form of All are rectangular plates, rectangular plates with vertical slits and round holes, X-shaped plates and strip plates. By changing the number of slits, aperture size, arc size and width of the steel plate, the ductility of the steel plate shear wall can be easily adjusted And rigidity, thereby improving the mechanical performance of the overall structure, it is a superior earthquake-resistant lateral force member. The invention can prevent the buckling of the steel plate, the embedded steel plate can be adjusted, the anti-seismic performance is good, the construction and installation are convenient, the steel material is saved, the cost is low, and it is easy to implement. .

The invention discloses a reinforcing steel bar regional scattered buckling-restrained brace and a construction method thereof. The reinforcing steel bar regional scattered buckling-restrained brace comprises a core stress unit, an external restraining unit and isolation layer units, wherein the core stress unit comprises a plurality of reinforcing steel bars penetrating through the external restraining unit and two connector units; the isolation layer units which are connected with the external restraining unit into a whole body are respectively arranged between each reinforcing steel bar and the external restraining unit; each reinforcing steel bar is not bonded with the corresponding isolation layer unit, and the part, extending out of each side of the external restraining unit, of the reinforcing steel bar is connected with one connector unit into a whole by virtue of an energy consumption reinforcing body. The construction method comprises the steps of firstly producing the external restraining unit, and then inserting the reinforcing steel bars into the isolation layer units; and finally installing the energy consumption reinforcing body and the connector units. By adopting the reinforcing steel bar regional scattered buckling-restrained brace, when an earthquake happens, the inertia force acting on a supported structure is remarkably reduced, the displacement response and acceleration response of the supported structure can be alleviated, and the damage degree of the supported structure is reduced.

The invention discloses a prefabricated energy-dissipating structural system with separation of gravity and lateral force and a design method thereof. The structural system includes a prefabricated shear wall and a frame column. The main beam, the main beam is installed between the adjacent frame column and the frame column, and the secondary beam is installed on the floor layer perpendicular to the prefabricated shear wall composed of the main beam, the prefabricated shear wall and the frame column. A metal damper is installed in the middle of the main girder, and supports are set under the metal damper. The design method includes determining the design scheme of the main beam, secondary beam and laminated slab composite floor, determining the design scheme of the prefabricated shear wall and frame column, the design scheme of the metal damper and support, and the design scheme of the connection node. The structural system and design method can separate the gravity and lateral force systems, facilitate the standardized design and manufacture of components, reduce engineering costs, enhance the energy dissipation capacity of the structure under earthquake action, and improve the seismic safety of the structure.

The invention provides structural steel with the yield strength being over 630 MPa for buildings. The structural steel is prepared from, by mass, 0.07%-0.12% of C, 0.1%-0.25% of Si, 1.3%-1.6% of Mn, 0%-0.015% of P, 0%-0.010% of S, 0.04%-0.06% of V, 0.02%-0.04% of Nb, 0.015%-0.03% of Ti, 0.4%-0.6% of Cr, 0.001%-0.003% of B and the balance Fe and inevitable impurity elements. The structural steel can bear large loads, the roughness and plasticity of the structural steel are well matched, the requirement for overload resistance of the structural steel for the buildings is met, the fluctuation of the yield strength of the structural steel is small, the load and deformation between steel structures are even, the overall plastic deformation capacity of the structural steel is improved, and the anti-seismic safety can be improved easily.