The present disclosure relates to the technical field of assembled concrete frame structures, and discloses a prestressed assembled concrete frame-joint connecting structure and constructing method thereof. The present disclosure includes a prefabricated concrete column, a prefabricated concrete superposed beam, a composite slab, a post-tensioned prestressing tendon that connects the prefabricated concrete column and the prefabricated concrete superposed beam, a bending-resistant energy consuming steel bar and a shearing-resistant high-strength steel bar.

An assemblable structural column joint connection using fiber-reinforced concrete filled round double steel tubes, including an outer high-strength round steel tube, an inner high-strength round steel tube and a round separation plate. The wedge-shaped teeth are provided at two sides of the outer and inner high-strength steel tubes, and wedge-shaped teeth spaced are uniformly distributed along circumferences of the inner and outer high-strength round steel tubes. The round separation plate includes a round plate provided with a central through-hole, and vertical separation walls are provided with on upper and lower surfaces of the round plate. The vertical separation walls are provided with wedge-shaped sliding grooves matching the wedge-shaped teeth. The inner and outer high-strength round steel tubes are fixedly connected to the round separation plate by matching the wedge-shaped teeth with the wedge-shaped sliding grooves.

The subject invention relates to a beam-column connection structure and method of making the same wherein the beam-column connection structure includes: a precast column comprising a plurality of tension bars horizontally embedded in the precast column; a precast beam comprising a metal plate fastened to an end surface of the precast beam, the metal plate having a plurality of through holes; and a plurality of fasteners, wherein each of the fasteners respectively penetrates through each of the through holes of the metal plate and connects to an end of a corresponding tension bar so that the precast beam is fixed to the precast column.

A system of construction that performs advanced prefabrication of columnsbeams type structure of buildings, prefabrication which results industrialization of this type of construction. The main development that allows this achievement in the same technical conditions, even better conditions than in the conventional system, is the massive use of braces as well vertically as horizontally. Such a building system is of special interest in areas where seismic risk is high because the building is very lightweight, constituted of a set of structurally self-sufficient units, heavily triangulated and therefore hardly deformable, all these at an affordable cost.

A connecting element for inserting into a wind power installation tower segment. A wind power installation tower section and a wind power installation tower. A wind power installation and methods for connecting partial ring segments. The connecting element comprises a first side wall with a first opening which can be penetrated by a fastening element, and a second side wall lying opposite the first side wall with a second opening which can be penetrated by a fastening element, an upper transverse wall with two upper openings which can each be penetrated by a mounting fastening element, and a lower transverse wall lying opposite the upper transverse wall with two lower openings which can each be penetrated by a mounting fastening element; wherein the upper and lower transverse wall are arranged substantially orthogonally to the first and second side wall and connect said side walls.

A concrete embeddable mount for a ledge is provided having a plate with a plurality of keyhole slots therein, four anchors extending from the back of the plate, for embedding the mount in a precast concrete component, wherein the anchors define vertices of a convex quadrilateral, and a fifth anchor extending from the back of the plate, wherein the fifth anchor is positioned within the convex quadrilateral defined by the four anchors. The invention further includes a ledge having a back plate and a perpendicular base extending from the back plate, wherein the back plate has a plurality of rearward extending studs aligned to engage the keyhole slots in the mount plate. Together, the mount and the ledge create a corbel system.

A reinforced compound concrete beam-column joint containing demolished concrete lumps and a construction method are disclosed. The steel strip stirrups configured to constrain column longitudinal reinforcements of the reinforced compound concrete column containing demolished concrete lumps and the steel connection sheets with grooves are arranged in joint at positions of the upper and lower beam longitudinal reinforcements of the reinforced compound concrete beam containing demolished concrete lumps. The steel strip stirrups abut against the column longitudinal reinforcements. The steel connection sheets are welded to the steel strip stirrups. One end of the short steel bars with threads at one end is welded into the grooves of the steel connection sheets, and the other end is connected to the beam longitudinal reinforcement via a steel sleeve. The joint prevents the beam longitudinal reinforcements from passing through the joint and thus causing reinforcements congestion.

The disclosed apparatus, systems and methods relate to reinforced concrete moment-resisting buildings with precast beams, precast columns, and replaceable buckling restrained reinforcements. Modular channels and pins or boxes are provided that allow for the replacement and repair of the precast moment-resisting beams and columns. Replaceable buckling restrained reinforcements are used to attach the beams and columns via embedded reinforcements and couplers.

Although Fiber Reinforced Polymers (FRPs), as alternatives for the corrosive steel reinforcement in concrete structures, have shown promising performance under gravity loads, their performance under reversal cyclic loading is still one of the main concerns. The linear behavior of FRP reinforcement has a two-sided effect on the seismic performance of FRP-reinforced concrete (RC) moment-resisting frames. Although the linear nature of FRP reinforcement could be advantageous in terms of limiting the residual damage after an earthquake event, it lowers the energy dissipation of the structure which can compromise its seismic performance. Disclosed herein is the addition of steel plates at selected locations in moment-resisting frames to improve seismic performance of FRP-RC structures while still being able to take advantage of its linear behaviour (minimal residual damage after earthquake). The effectiveness of the proposed solution was tested both experimentally and analytically.

A self-bracing, two-way moment frame precast system for industrial support structure and method of erecting a precast industrial support structure without temporary or permanent bracing or shoring are disclosed. This is accomplished by utilizing a moment frame element in two directions to create free standing tower that requires no bracing during erection or in service. The system also utilizes a connection that allows the erection crane to achieve alignment during erection such that the entire system can be erected by a ground based personnel.