METHOD FOR IMPROVING LARGE-PANEL STRENGTH IN EXTREME IMPACTS BY PREVENTING PROGRESSING DESTRUCTION

摘要

The invention relates to the field of prefabricated construction of residential, administrative and public buildings of high security from panel structures. The technical result of the invention is to increase the safety and survivability of a large-panel structure, including a base, prefabricated panels of transverse and longitudinal bearing walls, floor slabs supported by bearing walls, that the assembly of a large-panel structure is carried out by prefabricated-monolithic joints with means of stabilizing the structure in in the form of a two-line loop connection from loops emerging from the ends of panels and reinforcing elements passing through the loops. Then monolith the connection with concrete mortar at the construction site. On the basis of anchor elements are fixed in the form of rods at the intersection of the axes of the building under construction in accordance with the project. By means of reinforcing elements, two-module, single-module and end panels are mounted. From these panels form a single wall by the mentioned means of stabilizing the structure. The stabilization means is performed in the form of a combination of a two-line loop connection, with which horizontal panels adjacent to each other are fastened in the direction transverse to the joint by means of at least two adjacent groups of embedded steel loops of both panels placed in the cavity between them, and vertical panels are fastened together using said couplers made in the form of reinforcing bars passed through the above-mentioned loops, and provided at the ends with connecting elements for fastening to adjacent reinforcing bars. Included in the combination of connections, a single-line tubular-rod connection is fastened to vertically adjacent panels by means of a reinforcing rod provided at the ends with connecting elements for fastening to adjacent reinforcing bars, passed through a tube installed in a vertical hole made in the panel body at a distance equal to half the distance L between the rods of a two-line connection at the ends of the panel. The reinforcing rods of all the panels on the first floor are fastened with connecting elements to the mentioned anchor elements of the base, located at a distance of 0.5 L from each other. In the joints of floor slabs, fittings are installed for the entire length of the joint, with the possibility of ensuring the transfer of load to the upper and adjacent vertical reinforcing bars while breaking the panel and breaking one of the vertical bars in a two-line loop connection or in a single-line tubular-rod connection in the panel body, with the possibility providing, under extreme impacts, retention from the collapse of panels and their hovering over a torn vertical joint due to reinforcement. The reinforcement is laid in horizontal seams on the entire floor of the building, and floor slabs, reinforcement cages are installed on it. Concrete is poured into all cavities formed between the panels and the base of the structure; cavities between elements of loop connections; cavities between the specified tubes and reinforcing bars and connections of floors with underlying panels. The indicated means of stabilizing the structure are supplemented by the fact that wall panels are staggered, starting from the first floor with a shift of the panels of the overlying floor by a distance of 0.5 L between two-line joints. The process of erection of subsequent floors is carried out similarly after hardening of prefabricated-monolithic joints. The base of the structure can be made in the form of a solid foundation slab, or in the form of reinforced concrete stylobate, or in the form of a frame structure. The connecting element can be made in the form of a crimp sleeve, or in the form of a plate welded to two rods, or in the form of a threaded sleeve. The specified tube may have an internal diameter of 1.5-2.5 times the diameter of the reinforcing bar passing through it. The specified tube has an inner and outer corrugated surface.