The invention provides an assembled steel frame-steel reinforced concrete core cylinder structure system. The system comprises a steel frame and a core cylinder fixedly connected inside the steel frame, the steel frame consists of steel beams and steel columns, the steel columns are arranged along the periphery of the steel frame, adjacent steel columns are fixedly connected through the steel beams, and the steel columns are fixedly connected with the outer side wall of the core cylinder through the steel beams; and the core cylinder is formed by connecting prefabricated steel reinforced concrete shear walls through connecting members. The assembled steel frame-steel reinforced concrete core cylinder structure system is high in lateral stiffness, simple in structure and reliable in force transmission, the prefabricated assembly type structure is simple, construction materials are saved, the construction is fast, the construction period is saved, the cost is saved, the influence on theenvironment is small, and the system is suitable for multi-tall assembled buildings.

Assembled steel frame-steel reinforced concrete core cylinder structure system, multi-tall building structure and construction method

Mold for precast concrete with inserted reinforcement material and mold-module for the mold

The invention discloses a method for connecting vertical seams between adjacent load-bearing wallboards in floors by the aid of added vertical reinforcing steel bars and post-poured concrete. The method includes firstly, laying the vertical reinforcing steel bars 2; secondly, welding and connecting the vertical reinforcing steel bars with one another by connecting reinforcing steel bars 3; thirdly, pouring the concrete 4. The method have the advantages that the prefabricated wallboards connected with one another by the aid of the method are firm in connection and good in safety; the vertical reinforcing steel bars are arranged in post-poured sections, and reinforcement ratios of the vertical reinforcing steel bars cannot be lower than reinforcement ratios of vertical distribution bars of walls; the prefabricated wallboards on two sides of each post-poured section can be connected with one another in extended connecting reinforcing steel bar welding and lapping or extended reinforcing steel bar, anchor ring and vertical joint bar combination modes.

Method for connecting vertical seams between adjacent load-bearing wallboards in floors

The invention discloses a vertical matching manufacturing method for precast concrete members. The vertical matching manufacturing method includes: manufacturing a bottom die on a lower precast concrete member, wherein the bottom die is in vertical matching butting with the lower precast concrete member; turning over the bottom die and manufacturing a top die on the bottom die, wherein the top die is in vertical matching with the bottom die; turning over the top die, manufacturing an upper precast concrete member on the top die, wherein the upper precast concrete member is in vertical matching with the top die; suspending the lower precast concrete member and the upper precast concrete member in vertical matching manner. The vertical matching manufacturing method for the precast concrete members is designed reasonably and has high matching precision; the upper and lower precast concrete members are completely matched through manufacturing the matched bottom die and top die on one precast concrete member, so that the joint of the upper and lower precast concrete components is matched completely, the manufacturer only needs to manufacture the matched modular bottom die concrete member and top die concrete member at the same period; the vertical matching manufacturing method for the precast concrete members is convenient to operate, the die height is small, the requirement for the equipment is low, and the construction quality is guaranteed easily.

Vertical matching manufacturing method for precast concrete members

PROBLEM TO BE SOLVED: To provide a precast concrete joining structure wherewith an embedded metal can be produced without welding a stud and a high accuracy can be ensured for execution of works without the need for embedment of a sleeve material for forming an insertion hole for high strength bolt. SOLUTION: A joining steel plate 27 is caught from both sides with each of edge parts 21a of a pair of precast concrete members 21 each of which is divided into two in the direction of thickness, and the precast concrete members 21 facing each other are joined together by tightening a high strength bolt 29 which is pierced through the edge part 21a and the joining steel plate 27. In this case, a closed-end cylindrical embedding cap 23 is embedded at the edge part 21a of the precast concrete member 21. With the joining steel plate 27 caught between the bottoms 23a of the embedding caps 23 fastened tight with the high strength bolt 29, the edge parts 21a are stuck fast to the joining steel plate 27.

Precast concrete member joining structure

PROBLEM TO BE SOLVED: To obtain a manufacturing method of a precast concrete member wherein when two PCa panels are joined together to manufacture a precast concrete member for use as, for example, an earthquake resisting wall, even if the flatness of each of the panels is not sufficient and there is a slightly non-flat surface, the panels conform with each other in the joined state so that when they are used as earthquake resisting walls, high reliability can be achieved in terms of strength. SOLUTION: In manufacturing a precast concrete member wherein precast concrete panels (PCa panel) 1a, 1b, divided in two parts in the thickness direction, are laminated and joined to each other to form a precast concrete member, concrete is placed in a form to mold the PCa panel 1a, thereby forming a form 4 having a bottom plate comprising the PCa panel 1a and the other PCa panel 1b is formed in the form 4. And after both the panels are removed, the top side of the panel la is oppositely oriented to the bottom side of the panel 1b to join them to each other to form the precast concrete member.

Akiyama Yasushi

Papers

Precast concrete member joining structure

Manufacture of precast concrete member