Buckling-restrained brace is a kind of brace member composed of core material, sleeve which restricts the buckling of core material, unbonded material between core material and sleeve and filling material. This kind of support has the same bearing capacity and energy dissipation mechanism as ordinary support in tension.
According to the different requirements of stiffness, bearing capacity and energy consumption in structural design, TJ buckling-restrained braces can be divided into three types: energy consumption type, load-bearing type and buckling-restrained brace dampers.
According to the structural form of buckling-restrained braces, TJ buckling-restrained braces can be divided into pure steel type and filled type, and their application scope is as follows: name, basic structure, application scope and pure.
steel
T-type TJS A pair of standard steel pipe restrained I-shaped steel cores are 300TTJB, and the steel core length of I-shaped combined section restrained by external steel pipe is >: 10m tonnage > 500T.
be filled/suffused/brimming with
be filled/suffused/brimming with
T-type TJC concrete-filled steel tube confined I-shaped or cross-shaped steel core (original TJC II type was improved, and the support appearance was reduced) length < 20m tonnage <1300TTJP concrete-filled steel tube confined H-shaped composite section steel core length < 20m tonnage > 300tjpadditional fracture prevention device ensures the tensile bearing capacity of the support core after fatigue fracture.
TJD tension-compression energy dissipator is a two-step or multi-step yielding product, and the core material of energy dissipation is low yield point steel (LY100/LY160/LY225). Through the design, it can enter the yield energy consumption in stages under small earthquakes, moderate earthquakes and large earthquakes, providing additional damping for the structure, and at the same time, through structural measures, it is guaranteed to continue under large earthquakes.
Shear damping products
Shear type energy dissipator (TJS type)
TJS metal shear energy dissipator is a pure steel member, and its yield bearing capacity is generally below100t. Low yield point steel (LY100/LY160/LY225) is adopted as the core energy dissipation steel plate. A large number of tests and practical projects have proved that it has good low cycle fatigue performance and energy consumption ability.
TJ type buckling-restrained steel plate wall
TJ-type buckling-restrained steel plate wall is a new type of lateral force-resisting energy-consuming member, with ordinary steel plate or low yield point steel as the core lateral force-resisting member, and the two sides of the steel plate are restrained from out-of-plane buckling by special devices.
Bending-shear damping products
TJL type energy dissipation steel coupling beam
TJL-type energy-consuming steel coupling beam (two-step buckling) is used to replace the traditional concrete coupling beam in concrete coupled shear wall, which can greatly improve the stiffness, bearing capacity, ductility and energy dissipation capacity of the coupling beam. It can be designed into bending energy consumption type, shear energy consumption type and bending-shear energy consumption type according to needs, and the yield time can be controlled. It can be replaced after the earthquake.
TJEL eccentric beam section
TJEL eccentric energy dissipation beam section is used to support steel frame structure instead of traditional eccentric energy dissipation beam section. It can be designed into bending energy consumption type, shear energy consumption type or bending-shear energy consumption type according to needs, and has the advantages of strong energy consumption capacity, controllable yield opportunity, and replacement after earthquake.
Viscous damper
Viscous damper generally consists of cylinder, piston and viscous liquid. The cylinder is filled with viscous liquid, usually silicone oil or other viscous fluid, and the piston is provided with a small hole. When the piston reciprocates in the cylinder, the liquid passes through the small hole on the piston, damping the relative motion between the piston and the cylinder, thus consuming vibration energy. Viscous dampers are speed-dependent energy dissipators.
Tuned mass damper (TMD)
Tuned mass damper (TMD) is a vibration system composed of spring, damper and mass, which is generally supported or suspended on the structure. When the structure vibrates under external excitation, it drives the TMD system to vibrate together, and the inertial force generated by the TMD system reacts on the structure, so that it can tune the vibration of the main structure, thus reducing the vibration response of the structure.
Steel bearing products
Spherical steel bearing is the most commonly used steel bearing product, which provides bearing and rotation function through spherical crown liner, spherical wear-resistant plate and concave spherical seat plate, and displacement function through plane displacement between plane wear-resistant plate and stainless steel plate. It has the advantages of flexible rotation, small rotation reaction torque, large rotation angle, uniform rotation performance in all directions, uniform force transmission and good durability, and is widely used in buildings and bridges.
TJZ steel bearings cover all common types of metal bearings on the market at present. At the same time, through innovative optimization design, compared with traditional bearings, TJZ steel bearings can achieve smaller size, more convenient installation and more comprehensive functions.
Precast reinforced concrete isolation stairs
Precast reinforced concrete isolation stairs are the combination of precast reinforced concrete stairs and stair isolation bearings. It has the advantages of saving formwork, improving construction speed, high degree of industrialization, less on-site construction, no seasonal construction restrictions, convenient use and so on. At the same time, it can effectively release the "scissors bracing" effect of stairs under the earthquake, weaken the influence of stair components on the seismic performance of the main structure, and ensure that the stair structure has sufficient constraints and (continuous) collapse resistance. Structural engineers determine the required product parameters through overall structural design and analysis, and then professional product manufacturers cooperate and implement them professionally to ensure its final shock absorption effect. Unqualified products and unprofessional implementation will cause great hidden dangers, reduce the actual shock absorption effect and make the structure a dangerous building in seismic performance. In the field of building shock absorption, Michelle shock absorption provides a set of system services integrating professional shock absorption scheme, deepening design, product research and development, product manufacturing and project implementation.
In the design process, the unit is entrusted to provide the structural model, and the damping scheme needs architectural drawings. The specific parameters of damping products are designed. The entrusting unit shall provide the structural drawing or necessary parameters (including elastic-plastic analysis) of the construction drawing and calculation book of damping products. Product stiffness matching: The joint design of BRBs is closely related to the yield of BRBs in the morning and evening, which has a great influence on the energy dissipation capacity of BRBs. In order to make the overall axial stiffness k 1 in the deepening design consistent with the stiffness k2 in the structural model (i.e. =k 1=k2), detailed stiffness calculation is needed: k 1=k2=? 1/k1=1/k2 =1/k3+1/K5, where: K3-BRB stiffness, K4- node stiffness, K5- beam-column node stiffness.
Joint design: Buckling-resistant braces should not only meet the strength calculation of joints and embedded parts, but also avoid global instability, local instability, strengthened section buckling and out-of-plane buckling of joints.
Design displacement: The design displacement of BRB is generally used to test the low-cycle fatigue performance of energy-consuming products, which plays an important role in product quality. Determining the design displacement according to the earthquake analysis will make the product safer and more reasonable. Michelle shock absorber is one of the earliest companies engaged in the production of professional shock absorber products, with a mature professional production line and two production bases, with an annual output of10.5 million tons. Relying on ISO900 1 quality management system and strong production management team, the company pays attention to the principle of quality first and strictly controls every link of production to ensure that products can be delivered to customers on time.
Jiangsu Dafeng isolation products professional production base
Jiangsu Dafeng Factory is located in Weishiyi Road, the north area of Dafeng Economic Development Zone, Jiangsu Province, covering an area of about 55 mu, with a total construction area of about 32,706 ㎡, including production workshops, comprehensive buildings, substation rooms, doormen and other construction contents. This project is constructed in two phases and is scheduled to be completed in May 2065438+2005.
Jiangsu Nantong isolation products professional production base
Located atNo. Wuyi Road 18, Sutong Park, Chongchuan District, Nantong City, Jiangsu Province, it covers an area of about 30 mu and has a workshop area of about 8,000 ㎡, including production workshop, power distribution room and doorman. Michelle shock absorber has a professional and efficient executive team. In the process of construction, the company does not pursue "breadth" and "depth", but "specialization" and "precision". We have accumulated rich experience in the subdivision of shock absorber product implementation and construction, providing good service for target customers, and ensuring that products can play an accurate and effective role in building structures through excellent construction.
Introduction of construction method
On 20 12-20 13, Michelle Shock Absorber and China Xinxing Construction and Development Corporation jointly compiled the Construction Method of Buckling-Resistant Braces Installation, which passed the national construction method evaluation and was recognized as the national first-class construction method, comprehensively guiding and standardizing the construction and acceptance of buckling-resistant braces.
Engineering service site inspection, product construction drawing, deepening design, technical disclosure, on-site technical support product installation, organization and acceptance related data preparation.