SU1381263A1 - Rigidity membrane of earthquake-proof structure - Google Patents

Abstract

This invention relates to seismic stiffness diaphragms. The purpose of the invention is to increase the seismic stability of the structure. The prefabricated panels of the stiffness diaphragm are connected to the columns by means of elastic ties placed in the gaps between the columns and the prefab panels. The elastic connections are made in the form of a plate package of a curved profile and are set obliquely by the plane of the plates to the vertical axis of the columns and perpendicular to the plane of the prefabricated panels. 2 з.п, ф-л, 3 Il.

Description

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i. The invention relates to construction, namely to structures for storing 1/1 bulk materials, built in seismic areas.

The purpose of the invention is to increase the seismicity of the structure.

FIG. 1 is shown schematically | stiffness and aphragm; in fig. 2 —a and A in FIG. one; in fig. 3 - the node in FIG. one.

The stiffness diaphragm of the seismic resistant structure includes prefabricated panels .1 installed between columns 2 and horizontal bearing elements 3 and 4 of the building with a gap of Nfli 5 and 6 relative to columns 2 and between them and connected to the lower horizontal bearing element 3, for example, the foundation slab, by welding the reinforcement outlets 7, followed by concrete grouting with concrete and with the upper horizontal bearing element 4, which is a subsurface slab, by means of keyed recesses 8 and protrusions 9.

The stiffness diaphragm is provided with elastic connections 10, made in the form of a package of plates 11 of a curvilinear profile installed in the gap | 5 between columns 2 and panel 1 with I positioning the plane of the package of plates 11 tilted to the vertical axis of columns 2 and perpendicular to panel planes 1. Elastic couplings 10 are attached to columns 2 and panels 1 by means of bolts 12, passed into the holes of embedded parts 13 columns 2 and panels 1. Embedded parts 3 Can be made from channel profiles with the placement of the ends of a pack of plates 11 between the shelves14 embedded parts 13.

Key boxes 8 are made in panels 1.

To increase the mutual friction of the plates 11 of the bag, friction pads 15, for example, fluoroplastic, are installed between them. Between themselves, the plates 11 are connected with the help of bolts 16, the diameter of the holes for which is made on the size of two diameters of the bolts 16 themselves, corresponding to the maximum mutual shift of the plates 11.

The panels 1 are interconnected by plates 17 ,. which are welded to the embedded parts of panels 1.

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The mounting of the stiffening diaphragm is carried out as follows.

The plates of the foundation plate 3 are installed in columns 2, which are secured with the elastic connections 10 of panel 1. The panels 1 are fixed to the foundation plate 3 by welding reinforcement outlets 6 from panels 1 and the foundation plate 3 with the subsequent installation of solid concrete . Between themselves, the panels 1 are connected using plates 17.

After installation of the formwork equipment of the sub-plank board 4, monolithic concrete is laid. At the same time, the concrete fills the depressions 8 of the panels 1, forming the key joints, thereby creating a single monolithic structural system.

Under the influence of seismic forces, the concrete keys perceive the shear forces arising in the butt holes between the panels and the sub-plank slab 4, horizontally applied to the level of the latter.

When exposed to small seismic forces, the elastic connections 10, which act as shock absorbers, ensure the absorption of the vibrational energy of the sub-structures of the structure in the horizontal and vertical directions. The angle of the elastic connection 10 is selected depending on the direction of the resultant forces in the butt joint. When seismic forces are exceeded, it is possible to disconnect the elastic connections 10 from work, which is characterized by the shearing of bolts 12 from the mutual displacement of the plates 11 of the package, which leads to a drastic change in the dynamic characteristics of the structure and, consequently, an acceleration of the oscillation damping. At the same time, the structure leaves the resonance oscillation zone.

The curvilinearity of the profile package of the plates 11 avoids the shutdown of the elastic coupling 10 at a low level of seismic action if the resultant component forces are directed along the package of the plates 11.

The bolting of the ends of the package of plates 11 to the laid parts 13 makes it easy to replace them during restoration work after the earthquake.

Stiffness diaphragms perform the role of shutting off connections in the construction system under seismic effects, and their shutdown from working with the cell of the sub-landing floor should occur before the destruction of the columns 2 occurs. Thus, the stiffness diaphragms ensure the seismic resistance of the entire structure.

Claims (3)

1. Diaphragm of rigidity of seismic resistant structures, including prefabricated panels, installed between the columns and the horizontal bearing elements of the structure with gaps relative to the columns and between themselves and connected to the lower horizontal bearing element by welding the reinforcement, followed by concrete and the upper horizontal bearing element - POS0 0 A keyhole recess and protrusions, characterized in that, in order to increase the seismic resistance of the structure, the stiffness diaphragm is provided with elastic connections made in the form of a package of plates of a curvilinear profile installed in the gap between the panels and columns and attached to them by bolts packages obliquely to the vertical axis of the columns and perpendicular to the plane of the panels. 2. The diaphragm of claim 1, wherein the upper support element of the structure is made of Iolithic, and the keyways are formed in the panels. 3. The diaphragm according to claims 1 and 2, which means that the elastic connections are provided with friction gaskets. at 7 m / fm: -7-i / 7 /-/./i,// m / (pue.Z // / fie.E