SU1659611A1 - Frame of many-storeyed antiseismic building - Google Patents

Abstract

The invention relates to seismic multi-storey buildings. The purpose of the invention is to increase the seismic resistance. The crossbars of the lower floors are rigidly connected to the columns. The bolts of the upper floors are made in height by components of the parts with inclined docked edges. Between the latter are placed friction gaskets. Parts of the bolts of the upper floors are rigidly and cantileverly attached to the columns with ends with greater height. Between the ends with a smaller height and columns provides a gap. On the lateral faces of the parts of the transoms of the upper floors, at their horizontal edges, roller bearings are installed to connect the transoms of the upper floors to each other for the entire length and / or width of the frame, 6 Il.

Description

The invention relates to the construction and can be used in the construction of frames of high-rise buildings in seismic areas.

The purpose of the invention is to increase the seismic stability of the frame.

FIG. 1 shows a fragment of a multistory building; in fig. 2 - the same plan view; in fig. 3 is a section A-A in FIG. 2; in fig. 4 is a section BB in FIG. 2; in fig. 5 is a sectional view BB in FIG. four; in fig. 6 is a cross-section of the FIG. four.

The skeleton of an earthquake-resistant multistory building includes columns 1, bolts 2 and bolts 3 rigidly connected to columns 1, and the reinforcement in the form of ropes 4, which are stressed in construction conditions. The bolts 2 of the upper floors 5 are made of two

parts 6 with inclined docked faces 7. Parts 6 are located with a gap 8 between their inclined faces 7 and are rigidly and cantileverly attached to the columns 1 with the ends 9 with a greater height. A gap 11 is formed between the ends 10 with a smaller height and columns 1. In the gap 8 between the inclined edges of the parts 6 a friction gasket 12 is placed.

On both lateral faces 13 of the component parts 6 at a given distance along their length determined by calculation, roller bearings 15 are installed at the horizontal faces 14. Parts 6 of each crossbar 2 and crossbars 3 with each other along the entire length and width of the building (crossbars 2 are located in two directions) are connected by tensile reinforcement in the form of ropes 4, covering

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alternately roller bearings 15 parts 6 crossbars 2.

It is possible to place the bolts 2 in one direction, true to the width of the frame, or to ensure the stability of the frame from the plane of the bolts 2,

During installation, the lower part 6, re-elch 2, is first mounted on the mounting tables 16, followed by welding of the outlets 17 and 18 and setting up the junction 19, Zateu and installing the friction gasket 12 and installing the upper part 6 of ri 2 followed by welding the fittings 17 and 18 and freezing the joint 19. Having eaten the installation of bridge 2, the reserve and tension of the rope 4

Frame construction oahtahin earthquake-proof building paOoiviei as follows.

With vertical l, ozone oscillations of the building, the upper ones are equipped with a sogts-bridging bolt 2, which carry a large load from the slabs, and the lower parts of the composite girder 2 gtoluch from different acceleration and displacement. squatting to the emergence of fairies of force between the components of the 6 bolt}. friction gasket 10, coil: increases with displacement; returning the system to its original state; de-energizing the force of the elastic jet; the absorption of the seismic radiation that occurs at the same time, reducing the pressure of the inertial load; chz frame. o / idi V-W p intensive OESS. FIRMWARE, caused by eyxMrppetne, the resonant amplitudes of i-oscillations of odzni will differ little from c1, m plate to p i of the echo resonance zones, which is confirmed. In addition to toro, lroizojetset is a significant change in resonant frequencies.

The constructive solution of bolt 2 allows the use of positive qualities of rigid nodes, such as the most critical elements i e, and to ensure a high degree of seismic energy dissipation due to the inclusion of the 5 frames and useful utility signals into the main section of the upper floors.

The use of a prestressed rope as an elastic element of friction si: tcm leads to a significant increase in the number of fasteners and reduces the laboriousness of the friction device.

In addition to his. softening the reaction of the elastic friction) - 1x estimate 1 method, 5to protect the bearing elements from brittle fracture. For such a frame, separate overload cycles, which occur during earthquakes, are less dangerous, which increases the reliability of the building.

Placing the composite girders 2 in the upper floors 5 of the building is most effective, since the presence of flexible upper floors 5 leads to a redistribution of the vibrational energy of the building: the amplitude of fluctuations in the floor levels of the lower floors 20 will decrease, as the upper floors 5 will perceive and dissipate most of the energy seismic effects.

The number of composite bolts 2 of the total number of bolts 2 and 3 must be determined by a calculation that takes into account the reduction of the rigidity of the frame when using composite bolts 2. Approximately, the bolts of at least two upper floors of a multi-storey building should be made to form flexible ega.

The ratio of the heights of the component parts 6 of the bolt 2 determines the efficiency of its work with vertical oscillations. The component parts 6 of the transom 2 are symmetrical with respect to the seam separating them. The smallest height of part 6 of bolt 2 should be 80-100 mm to accommodate reinforcement, the total height is determined by calculating bolt 2 as a composite rod for a given load.

Claims (1)

Claims The frame of an earthquake-resistant multi-storey building, including columns, rigidly connected to girders, and reinforcement under construction conditions, characterized in that, in order to increase the seismic stability of the frame, the girders of the upper floors are made of two parts in height with inclined joined edges m, located with a gap between the latter and cantilever ends attached to the columns with a greater height, while the crossbars are equipped with friction pads placed in the gaps between their inclined faces components, and roller bearings, installed along the length of the latter on both lateral faces at a given distance from one another at the horizontal face, and component parts and girders are interconnected by tensioned reinforcement in the form of ropes, which alternately cover roller supports of the transom parts for the length and / or width of the frame. / 2 13 / h15 H 1 15 FIG. 2 g 7 d u five / / / Ll LI J j ff- & B gff Have 9-9