43results about How to "Meet earthquake resistance requirements" patented technology

The invention discloses a fabricated building support with an anti-seismic function. The fabricated building support comprises a longitudinal relief device and a plurality of transverse relief devices, the longitudinal relief device mainly reduces force generated by the longitudinal amplitude through an anti-seismic ball hinge, and the longitudinal seismic force is dispersed; and the transverse relief devices are arranged around the longitudinal relief device in the circumferential direction in an equal division mode. An air shock absorption device is arranged, and thus transverse seismic force is evenly absorbed by the air shock absorption device; and the support is arranged on the lower part of a ground cross beam, thus the number of supports can be adjusted according to the actual needs, and then seismic transverse and longitudinal force is effectively dissipated and mitigated.

The invention discloses a bridge collision buffering anti-seismic structure, which is arranged at the junction of a cover beam and a beam body of the bridge to strengthen the anti-seismic ability of the bridge. The top surface of the cover beam is provided with a friction pendulum support, and the beam body is supported on the friction pendulum support; the two ends of the cover beam are respectively extended upward to form a stopper; each stopper is embedded with two L-shaped steel plates on the side of the beam body The end of the L-shaped steel plate has a certain slope angle; the surface of the stopper between the two L-shaped steel plates is provided with a rubber layer; the distance between the two L-shaped steel plates is disposed with a certain number of arc-shaped steel bars, and the rubber layer is disposed at a certain distance. Steel embedded parts are arranged on the side of the beam body. During strong earthquakes, the invention can effectively buffer the impact of the main girder on the stopper under the action of the earthquake, dissipate the seismic energy, thereby limiting the larger displacement of the beam body and preventing the occurrence of beam falling accidents.

The invention provides a hybrid type rapid direct current breaker, comprising: a main flow branch, a current transferring branch and an energy consumption branch. All are connected in parallel. The main flow branch comprises a rapid mechanical switch unit and a main branch sub-module unit. The two units are in series connection. The current transferring branch comprises valve module units in successive cascade connection with each valve module unit comprising a plurality of semiconductor modules in series connection. The energy consumption branch comprises energy consumption components in successive cascade connection. According to the invention, the design of the breaker structure is such a design featuring the electrical topology corresponding to modularization. This means that for the application requirement of different voltage grades, the structure can be expanded to do so. As the breaker adopts a single platform supporting structure, all functional units can be integrated onto the platform, therefore, making the equipment highly integrated, small in size, and strongly resistant to earthquakes. Highly reliable and flexible in structure, better electric compatibility can be achieved. With the breaker, it is possible to rapidly cut off the current in fault when the direct current system meets a fault.

The invention discloses a continuous rigid frame bridge suitable for a high-waterline impoundment reservoir area. The pile type continuous rigid frame bridge can meet the requirements for strength and flexibility without a common pier. The pile type continuous rigid frame bridge comprises a girder, two girder connecting parts and a pile group foundation, wherein the two girder connecting parts stride the girder, the pile group foundation is composed of a set of filling piles, and the filling piles are in rigid connection with the girder connecting parts. The filling piles comprise upper columns and lower columns, wherein the upper columns are connected with the girder connecting parts, and the lower columns are poured into a bed rock. Longitudinal steel bars are arranged on the upper columns after the following carrying capacity limiting condition calculation and the normal using limiting condition calculation are carried out. Longitudinal steel bars are arranged on the lower columns according to the file foundation requirement. Pile transition sections are arranged between the lower columns and the upper columns, and the longitudinal steel bars in the pile transition sections are the same as longitudinal reinforcing bars of the upper columns. The invention further provides a construction method for the pile type continuous rigid frame bridge. The pile type continuous rigid frame bridge has the advantages that the anti-seismic requirement is met, construction is convenient, construction cost is saved, and the construction period is shortened.

The invention relates to a high-strength low-carbon bainitic refractory steel and a preparation method thereof, which belongs to the technical field of low-carbon air-cooled bainitic refractory steel and solves the problems of low yield strength, complicated production process and high-temperature mechanics of refractory steel in the prior art. The problem of poor performance. A high-strength low-carbon bainitic refractory steel, the chemical composition of which is calculated by mass percentage: C: 0.07%‑0.1%, Si: 0.7%‑0.9%, Mn: 1.0%‑1.5%, Cr: 0.7%‑ 0.8%, Ni: 1.0%‑1.3%, Cu: 0.3%‑0.35%, Mo: 0.6%‑0.8%, Nb: 0.025%‑0.035%, V: 0.09%‑0.15%, Ti: 0.01%‑0.015% , (Nb+V+Ti)<0.2%, Alt<0.02%, S<0.003%, P<0.008%, and the balance is iron and unavoidable impurities. The invention improves the yield strength and high-temperature mechanical properties of the refractory steel.

The invention discloses a trigger-type anti-seismic double block device for a bridge, which comprises a concrete block formed by extending upwards at both ends of a cover beam, and a pre-embedded steel plate is arranged inside the concrete block; on the cover beam between the concrete block and the main beam The surface is fixed with a steel box, and the steel box is provided with an opening that penetrates up and down. A short stop is inserted in the opening, and the length of the upper end of the short stop protruding from the steel box is greater than the depth of the pit; the bottom of the steel box deviates from the hole And the upper surface of the cover beam that is biased to the outside of the bridge is provided with a pit with a size slightly larger than the cross-sectional size of the short stop; there is a gap between the steel box and the main beam, and an elastic-plastic deformation device is fixed between the steel box and the embedded steel plate. The invention can make the upper structure of the bridge have a self-resetting function under the action of medium and small earthquake loads, and can effectively dissipate the seismic energy under the action of strong earthquakes and trigger the second stopper to participate in earthquake resistance, thereby reducing the occurrence of lateral beam falling accidents, thereby improving The seismic performance of the bridge structure is improved, and the manufacturing layout is simple and the cost is low.