The present invention is directed to a brace apparatus having a core member configured to absorb energy generated by seismic or other forces by undergoing plastic deformation. A buckling restraining assembly is included for maintaining the structural integrity of the brace after the core member has undergone plastic deformation. The buckling restraining assembly includes one or more bearings is located proximal the core member. The bearings are adapted to minimize friction between the core member and the buckling restraining apparatus. An air gap is positioned between the core member and the one or more bearings of the buckling restraining apparatus are adapted to prevent bonding of the core member and buckling restraining assembly. Projections are included in the core member of the brace apparatus to minimize movement of the middle portion of the core member relative to the buckling restraining assembly.

Bearing brace apparatus

A seismic brace includes an elongated central brace unit and a rigid restraining member The central brace unit has two ends adapted to be connected fixedly to a framework of a building, and a middle portion interconnecting the ends and having a cross-sectional area that is smaller than those of the ends The restraining member is disposed around the middle portion of the central brace unit in a tight fit manner so as to prevent buckling of the central brace unit when the building is subjected to an earthquake, and includes two halves that are interconnected removably

Seismic brace with a removable restraining member disposed around a middle portion of an elongated central brace unit

The present invention relates to structural braces More particularly, the present invention relates to a brace apparatus that has an effective length capable of undergoing plastic deformation that is greater than the length of the brace apparatus The brace apparatus has a first core member having a deformable region of an effective deformable length and a second core member having a deformable region of an effective deformable length The total effective deformable length of the brace apparatus is the sum of the effective deformable length of the first core member and the second core member This allows the brace apparatus to have a greater deformable length relative to the length and size of the brace Additionally, the greater deformable length reduces the strain on the core members enabling the brace apparatus to undergo a greater amount of deformation for a larger number of total cycles without buckling the brace

Double core brace

A seamless steel pipe comprises a specific carbide that has an equivalent carbon content (Ceq) of 0.50 to 0.58%, contains Mo in an amount of 50 mass% or more, contains V, additionally contains one or two components selected from the group consisting of Ti and Nb, and has a size of 20 nm or more.

Seamless steel pipe and method for producing same

The disclosed subject matter is directed to a building structural bracing apparatus having an inner core element sandwiched between an upper and a lower containment web. The brace frame being useful in the construction of earthquake and blast resistant structures where energy dissipation is desired.

Buckling restrained brace assembly

PROBLEM TO BE SOLVED: To prevent the local buckling of a brace core material by forming a slit on both the ends of a buckling restraint material, and inserting the rib of the brace core material into the slit. SOLUTION: A buckling restraint material 3 sandwiching the intermediate part of a brace core material 2 in the plate thickness direction is assembled on the brace core material 2 projecting a rib 22 on both the ends, and the deformation of the plate thickness direction of the brace core material 2 is restrained. Then, a slit 33 whose end face side is opened is formed on both the ends of the buckling restraint material 3, and the rib 22 of the brace core material 2 is inserted in the slit 33. A cover plate and a stiffner are welded around the slit 33 to be reinforced around the slit 33. In addition, a sheet-like cushioning material 4 is provided between the brace core material 2 and the buckling restraint material 3, and the transmission of friction force is cut off between the brace core material 2 and the buckling restraint material 3. Thereby a reinforcing section due to the rib 22 and a restraint section due to the buckling restraint material 3 are overlapped, and the local buckling of the brace core material 3 can be prevented.

Buckling restraint brace

PROBLEM TO BE SOLVED: To provide a vibration control device and vibration control structure for a joint part, having a very large capacity of absorbing vibration energy in the case of an earthquake or a gale. SOLUTION: The vibration control device 4 is fitted to the inside of a joint part (connection part) of a column 1 and a beam 2 of a wooden framework. The vibration control device 4 is formed by fixed parts 4b fixed to the side parts of the column 1 and the beam 2, respectively, and a deforming part provided between the fixed parts 4b, 4b on both sides to be bent in the direction of the in-plane of structure or the out of plane of structure of the framework, whereby the displacement of the joint is absorbed by deformation in the direction of the in-plane of structure or the out-of-plane of structure of the framework.

Vibration control device and vibration control structure of joint part

PROBLEM TO BE SOLVED: To provide a high strength steel having a tensile strength of ≥780 MPa and a yield ratio of ≤90%, and to provide a method for producing the same SOLUTION: The high tensile strength steel comprising, by mass, 002 to 02% C, 001 to 05% Si, 04 to 25% Mn, 01 to 1% Cr, 01 to 1% Mo, 001 to 0035% Ti, 00003 to 0005% B and 0001 to 01% Al, and the balance Fe with impurities in which the content of P is ≤005%, the content of S is ≤0008% and the content of N is ≤001%, also, the value expressed by the following formula (a) is ≤85, and the ratio of martensite is ≥80%: the formula (a) is 446+1086×Nb(%)+773×Ti(%)+244×(R Fe /C(%)); wherein the atomic symbol in the formula is the content (mass%) of the element; and R Fe is the content (mass%) of Fe present as precipitates measured by an extraction residue method The steel may contain one or more kinds selected from Nb, Cu, Ni, V, Ca, Mg, rare earth metals and Zr as well In the production method, specified slab heating temperature, quenching conditions and heat recuperating conditions are used COPYRIGHT: (C)2007,JPO&INPIT

High tensile strength steel having excellent plastic deformability after cold working, and method for producing the same

PROBLEM TO BE SOLVED: To provide a submerged arc weld metal of high tensile strength steel having a tensile strength of ≥900 MPa, which is subjected to multilayer build up welding by submerged arc welding in the combination of solid wire and bond flux, from which satisfactory strength and stable toughness can be obtained, and whose working property in welding is satisfactory, and which is free from welding defects. SOLUTION: The submerged arc weld metal of high tensile strength steel obtained by being subjected to multilayer build up welding by submerged arc welding in the combination of solid wire and bond flux has a composition comprising per total mass of the weld metal, by mass, 0.04 to 0.09% C, 0.20 to 0.35% Si, 1.6 to 2.3% Mn, 2.5 to 3.0% Ni, 0.55 to 1.0% Cr and 0.55 to 1.0% Mo, and comprising ≤0.20% Cu, ≤0.022% O and ≤0.006% N, and the balance Fe with inevitable impurities. COPYRIGHT: (C)2008,JPO&INPIT

Submerged arc weld metal of high tensile strength steel

PROBLEM TO BE SOLVED: To provide a vibration damping device capable of reducing a manufacturing cost by facilitating a production SOLUTION: This vibration damping device is formed one sheet of plate and comprises a first fixed part 1a fixed to a part 2a of a structure 2, bent- deformed parts 1b and 1b formed on both sides of the first fixed part, both outside parts 1c and 1c having ribs 1d formed by bending on the outside of the bent-deformed parts, 1b, 1b and a second fixed part le for fixing the both outside parts to the other part 2b of the structure 2

Masamichi Sasaki

Papers

Buckling restraint brace

Vibration control device and vibration control structure of joint part

High tensile strength steel having excellent plastic deformability after cold working, and method for producing the same

Submerged arc weld metal of high tensile strength steel

Vibration damping device