SU1705530A1 - Earthquake-proof multistory building - Google Patents

Abstract

The invention relates to the construction and can be used in the construction of multi-storey earthquake-resistant buildings. The purpose of the invention is to increase the number of floors of the building when it is erected on unevenly compressible soils. The barrel stiffness is made in the form of a stepped pyramid of cruciform shape in plan of the panels of the outer and inner walls and floor slabs rigidly interconnected. The dimensions of the trunk stiffness are equal to the width or length of the building. The remaining panels of the outer and inner walls and the floor slab located outside and inside the trunk stiffness, are connected to each other and with the trunk stiffness pivotally to form limiters for their horizontal displacements. 1 hp ff, 11 ill. SO with

Description

The invention relates to construction and can be used in the construction of multi-storey large-panel residential and public buildings in high-seismic areas on weak subsiding and evergreen soils.

The purpose of the invention is to increase the number of floors of the building when it is erected on unevenly compressible soils.

FIG. 1 shows a multistory building; in fig. 2 is a section A-A in FIG. one; in fig. 3 - multi-storey building of several block sections; in fig. 4 is a section BB in FIG. 3; in fig. 5 - multi-storey building of round shape, plan; in fig. 6 shows a section B-B in FIG. 5. in FIG. 7 — node I in FIG. 1.3 and 5; in fig. 8 - section GG in FIG. 7: in FIG. 9 - node II on

FIG. 1.3 and 5; in fig. 10 — node III in FIG. 1.3 and 5: in FIG. 11 - section DD in FIG. ten.

A multistory seismic resistant building contains a bearing trunk 1 in the form of a stepped pyramid of cruciform shape in plan, made of 2 exterior panels and 3 internal walls and 4 floor slabs. Interconnected by rigid nodes 5. external 6 panels and 7 internal walls and 8 slabs placed outside and inside the stiffening shaft 1 and interconnected with and with the stiffness barrel 1 by the hinge nodes 9 with 10 horizontal displacement stops.

The joints of wall panels 6.7 with 8 floor slabs are dry contact or platform joints.

ivl o

| SL

ate

Gj o

Limiters 10 displacements are made in the form of cantilever protrusions 11, 12 of floor slabs 8 and wall panels 6 and 7 installed to form a dovetail connection and with gaps 13 in which resilient material 14 is placed, for example asbestos board.

The stability of the upper floors of the building above the trunk 1 is ensured by any of the known methods.

The panels of walls 2 and 3, forming trunk 1, may have the same formwork dimensions as the other panels of walls 6.7, but must have, for example, reinforcement outlets for rigidly connecting them among themselves and with 4 floor slabs.

Barrel stiffness 1 at the base is equal to the width or length (for small buildings) of the building.

This makes it possible to obtain the most developed base of the trunk 1 in its most intense lower zone.

In a building operation, structures with active seismic protection can be characterized as their dynamic parameters and characteristics varying at certain levels of seismic loads, which ensures a decrease in seismic effects and forces in the elements of the building.

In the period prior to seismic impacts, the building operates as a rigid structural system. When the earthquake intensity is significantly lower than the calculated building, due to the hinged connection of elements 6,7 and 8, it receives minor damage, expressed in the appearance of cracks along the contour of the wall panels 6 and 7.

With repeated shocks or primary shocks of greater intensity, but lower than calculated, the building becomes a flexible structural system with non-linear work, and the supporting elements 6 and 7 get some movement with the effect of dry friction, while the flexible floors of the building both inside barrel 1 and from the outside they serve as dampers of vibrations due to a dry gasket in the form of an elastically compressible material 14. When shocks of calculated intensity, a significant displacement of flexible floors leads to the formation of dampers of dry friction and front Fetching the elements of the trunk 1. Due to the difference in the dynamic characteristics of the trunk 1 and the flexible floors of the building, they receive different-phase oscillations, which has the effect of reducing seismic loads.

Barrel 1, receiving forces from floor discs of overlap, works as a cantilever rod that perceives bending and torsional forces as a motion limiter with high dissipative properties. Moving external with respect to the trunk 1 of the bearing elements 8 in the direction from the trunk 1 includes

the entire disk is blocked both inside the trunk 1. and outside from the opposite side due to the operation of the limiters 10 horizontal movements and the presence of dry gaskets in the hinged joints. This effect is particularly significant in the lower zone of the building, where the disc is blocked by external wall panels forming the base of the cross.

5 The forces perceived by the rigid pyramidal shaft 1 are transmitted to the ground through a developed cross-shaped base, which ensures the distribution of stresses and a reduction in unit loads.

0 cases | a seismic resistant structural system of a base that is insensitive to uneven ground sediments.

Due to this, the possibility of increasing the number of floors of a seismic resistant building, in particular, erected on weak unevenly compressible soils, appears. In addition, in the building, all the overlapping discs are inseparable and the plates 8 that form them under the dynamic effect of the floor

0 included in collaboration.

Thanks to the construction of the hollow core 1 and the hinged connection of the panels 6.7 of the walls and 8 floor slabs with it and between them is achieved

5 increase the adaptive properties of the building, especially on unevenly compressible and permafrost soils. This is ensured by the commissioning of building seismic loads for external

0 walls placed inside the trunk 1 of 6.7 wall panels and 8 slab disks of floors, which increase the dissipation of the oscillation energy, i.e. dissipative properties of the system, as well as due to different-phase oscillations

5 towers and the building itself, which reduce the seismic loads on the building.

In addition, the implementation of the hollow shaft 1 with a cross-shaped base with a developed in the lower floors in the plan reduces

0 design seismicity in its elements and in the foundation, as well as the load on the soil, which creates the possibility of using high-rise construction on weak unevenly compressible soils in areas

5 Far North. The barrel 1 in the form of a pyramid, having greater rigidity in the lower zone, decreasing in height, corresponds to the loads that arise in height and does not create excessive rigidity, thereby reducing the mass of the barrel 1 and the flow rate

metals and labor poi performing monolithic nodes. The reduction in mass of barrel 1 in turn further reduces the magnitude of the seismic effect on the building. The pyramidal shape of the barrel 1 reduces the center of gravity in height, which also increases the stability and reduces the seismic loads and design forces in the elements of the barrel 1 and in the hard joints. u

Gaining formula 1. Multi-story earthquake-resistant building, including a precast stiffening trunk, exterior and interior wall panels, floor slabs placed inside and outside the stiffening trunk, hinged and rigid joints, in order to increase the floor height of the building erecting it on

unevenly compressible soils, the stiffness barrel is made in the form of a stepped pyramid of a cruciform shape in the plan, the dimensions of which at the base are at least

measures in one direction are equal to the length or width of the building, and is formed from panels of external and internal walls and floor slabs with rigid nodes connecting them together, and all other panels of walls and

The floor slabs are interconnected and with the stiffness shaft by hinged nodes with travel restraints.

2. The building according to claim 1, characterized in that the restraints are made in the form of cantilever projections of floor slabs and wall panels installed to form a dovetail connection and with gaps between them filled with elastic material.

 8 8 fi I

: ± after: i

FIG. five

PI 1 J UL-: - V -i

V.

Yu

v J: i Ji. i i

Iq

one

U3

 GTT

r // + -

-.- Cl-

iSfzLl

 sh i b sh u

  I li li i i i

-i

w

i

eight

/ N

/ - L1 .A-FIG. 6

x

rL

II I 1 1 I I

7

Yr

FIG. 8

 ( "one

13.14

/

13.14

 3

at

11 13

D

one

G

FIG. 9

# nfoe

III

t

th

fi 10

at

S

/ J-e

11

at

0

10.11

/;

l

Claims (2)

Claim 1. A multi-storey earthquake-resistant building, including a prefabricated bearing stiffness barrel, panels of external and internal walls, floor slabs placed inside and outside the stiffness barrel, articulated and rigid joints, characterized in that, in order to increase the number of storeys of the building during its construction on unevenly compressible soils, the stiffness barrel is made in the form of a stepped pyramid of a cross-shaped shape in plan, the dimensions of which in the base at least in one direction are equal to the length or width of the building, and is formed from external panels and internal walls and floor slabs with rigid nodes connecting them to each other, and all other wall panels and floor slabs are connected to each other and to the stiffener with hinged nodes with movement limiters. 2. The building according to claim 1, with the fact that the movement stops are made in the form of cantilevered protrusions of floor slabs and wall panels installed with the formation of a dovetail joint and with gaps between them filled with elastically compressible material. 8 8 8 Shchig. 1 T t 1 1 t 1 1 1 I > 1 I 1 eleven PCl <11111 1 1 1 eleven I 1 1 1 1 1 1 eleven 1 r t '1 H'1 I J- I 1 1 1 1 j ~ l ~ l ~ l ~ i ¹ 7t \ " t I * eleven "Uh Gugpf FIG. 5 δ FIG. 6 fig. 7 fig in fi g! ABOUT