A reinforcement structure includes compound trusses placed horizontally symmetrically, and each compound truss is constituted by a first truss and a second truss. Each first truss has: a vertical side; a first inclined side extending obliquely downward from an upper end of the vertical side; and a second inclined side connecting between the vertical side and a lower end of the first inclined side. Each second truss shares the first inclined side with the first truss and has: a horizontal side extending horizontally from the upper end of the vertical side; and a second inclined side connecting between a tip end of the horizontal side and the lower end of the first inclined side. Each compound truss is coupled to the construction in a state where the vertical side is along an inner side surface of the construction and the horizontal side is along a ceiling surface of the construction.

A one-piece clip includes a stiffener, a first connector plate extending from the stiffener at a first dihedral angle to the stiffener, the first connector plate configured for attachment to a support member extending beneath a corrugated metal deck, and a second connector plate extending from the stiffener at a second dihedral angle to the stiffener, the second connector plate configured for attachment to an underside of the corrugated metal deck. A method of retrofitting a structure to augment its resistance to uplift and seismic forces includes the steps of attaching a first connector plate of a one-piece clip to a support member extending beneath a corrugated metal deck, and attaching a second connector plate of the one-piece clip to an underside of the corrugated metal deck.

A method of retrofitting a pre-Northridge type steel beam-to-column connection, includes welding the web of the beam to a flange of the column and slotting the beam web in the region of the connection and near the beam flanges. Stress relief holes are made into the web of the beam and slots are cut into the web of the beam. A top backup bar is welded to the flange of the column and a bottom backup bar is removed from the flange weld to the column. The method includes back gouging the flange of the column at a position of the removed backup bar and welding a bottom flange of the beam to the flange of the column.

A coupler includes a cylindrical body having a first end and a second end; the cylindrical body including an axial hole extending from the first end to the second end with a side wall, the axial hole including a first portion for receiving an end portion of a first rod and a threaded second portion for receiving an end portion of a second rod; and the cylindrical body including a first longitudinal cutout extending into the side wall to create a first opening into the first portion of the axial hole to expose the end portion of the first rod to be welded to the cylindrical body.

Disclosed is a buttress assembly located outside side walls comprising non-bearing walls located in a long side direction of an existing building and comprising concrete, the buttress assembly including a plurality of reinforcing steel structures extending in a short side direction of the existing building, connected to the existing building by anchors, and arranged in a vertical direction of the side walls.

A reinforcing structure for a wooden building, having: a first anchor bolt that is horizontally inserted into a concrete foundation of the wooden building and fixed to the concrete foundation by an adhesive agent; a second anchor bolt that is horizontally inserted into a wooden beam of the wooden building and fixed to the wooden beam by the adhesive agent; a reinforcing steel bar that is arranged between the first anchor bolt and the second anchor bolt; a first fixing member that connects and fixes the first anchor bolt and the reinforcing steel bar with each other so that the first anchor bolt and the reinforcing steel bar are orthogonal to each other; and a second fixing member that connects and fixes the second anchor bolt and the reinforcing steel bar with each other so that the second anchor bolt and the reinforcing steel bar are orthogonal to each other.

A polymer-modified hybrid-fibers cementitious composition has a one-day compressive strength of at least approximately 17 MPa, a 28-day tensile strength of at least approximately 3.8 MPa, an ultimate tensile strain of approximately 3% to approximately 9%, and a 7-day bond strength of at least approximately 2.3 MPa. A binder of ordinary Portland cement, fly ash, and silica fume is provided. Other components include limestone powder, sand, superplasticizer, and water. The composition further includes one or more of styrene butadiene rubber or ethylene-vinyl acetate copolymer in an amount ranging between approximately 2% and approximately 8% by mass of binder. Fiber additives include steel fibers in an amount ranging between approximately 0.3% and approximately 3.0% by volume of the cementitious composition and polymer fibers in an amount less than approximately 1.0% by volume of the cementitious composition. Chamfers made of the composition are positioned at beam-column joints.

A one-piece clip includes a stiffener, a first connector plate extending from the stiffener at a first dihedral angle to the stiffener, the first connector plate configured for attachment to a support member extending beneath a corrugated metal deck, and a second connector plate extending from the stiffener at a second dihedral angle to the stiffener, the second connector plate configured for attachment to an underside of the corrugated metal deck. A method of retrofitting a structure to augment its resistance to uplift and seismic forces includes the steps of attaching a first connector plate of a one-piece clip to a support member extending beneath a corrugated metal deck, and attaching a second connector plate of the one-piece clip to an underside of the corrugated metal deck.

A shearwall is disclosed for use in lightweight or other constructions to transmit lateral shear forces and dissipate energy on the construction. In examples, the shearwall includes a central panel formed of wood, and side plates formed of steel. The side plates may be affixed at lower corners of first and second opposed surfaces of the central panel. Each side plate may include a fastening plate for affixing the side plate to the central panel, and a restraint plate which fits within a reduced area section of the central panel between the first and second surfaces.

A damper for reinforcing earthquake resistance according to the present invention includes a first supporting part mounted in a building structure, a second supporting part mounted on a support structure movably disposed to be separated from the building structure, and disposed to face the first supporting part, and a damper part connecting the first supporting part with the second supporting part and absorbing energy generated by an earthquake.