SU949148A1 - Framing for seismically resistant many-storied building - Google Patents

Description

(5) FRAME OF SEISM RESISTANT MULTILEVEL BUILDING

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

The closest technical solution is the skeleton of an earthquake-resistant high-rise building, including columns and girders, forming longitudinal and transverse frames, and diagonal connections located along the perimeter of the building}.

The disadvantage of this solution is insufficient protection of the building during seismic overloads, as a result of which the internal partitions are destroyed, large cracks appear, and the decorative external and internal facings are exposed, the cracks between the panels and the destruction in the corners of the panel occur. lei and partitions, etc., which requires a large cost to restore.

The purpose of the invention is to increase the seismic resistance and reduce the cost of

restoration work after the earth trail.

This goal is achieved by the fact that the skeleton of an earthquake-resistant multi-storey building, including columns and girders, forming longitudinal and transverse frames, and diagonal connections located along the perimeter of the building, the frame in the plane of the internal frames is provided with additional inclined columns, which are joined in pairs by lower ends, having spherical support element connections; and the foundations for inclined columns are made with a recess for mounting the support element, while the columns located along the perimeter of the building are supported on Information by means of a calibrated rod and an2Q kerovy bolts with cup springs.

Claims (2)

FIG. 1 shows the frame, plan; in fig. 2 - section A-A in FIG. on fig.Z - section bb in fig.T; in fig. And - node 1 on fig.Z; in FIG. 5, node II in FIG. 2; in fig. 6 - section bb In Fig. | in fig. 7 shows the k-k of FIG. The skeleton of a multi-story earthquake-resistant building is in plan-square. The columns of the building 1 are located along the perimeter of the square and in its central part. The columns 1 and girders 2, located along the perimeter of the building, are connected by diagonal links 3 and form a spatial square frame-like sheath, which is the main supporting element of the building framework. In order to ensure the spatial immutability of this shell, horizontal crossings C of prefabricated reinforced concrete slabs or connections are provided at the intersection of the links 3 with the edges of the framework columns. The columns 1 of the central part of the frame are connected in levels of floors and roofs by crossbars 2 (hinged or hard) with columns 1 located at the perimeter of the building with the formation of longitudinal and transverse frames 5. The frame in the plane of the inner frames 6 is provided with additional oblique columns 7, paired bottom ends having a spherical support element 8 in the joint unit. The foundations 9 for inclined columns 7 are made with a notch 10 for mounting the support element 8 of inclined columns -1. The columns 1, located around the perimeter of the building, are buried on the foundations 11 by means of a tattered rod 12 and four anchor bolts 13 fitted with plate springs 14. The vertical loads of the interfloor overlaps are perceived by the bolts 2, which transfer them to the columns 1. These loads are in level the overlap of the first floor is transmitted to the central support node by additional columns 7 | and the horizontal components arising from a change in the direction of the vertical forces in the level of the first floor overlap are perceived by links 4 and gel mi 2. An axially symmetric part of vertical loads is perceived by columns 1 located along the perimeter of the building, and transmitted to foundation 11 through rod 12. Horizontal loads (wind, seismic, etc.) are perceived by framework columns 1, which transfer them to floors frame in the shed shell formed by columns 1, bolts 2 and connections 3 located along the perimeter of the building. These loads are perceived by the links 3 of the trunk frame and are transmitted to the central support unit. The normal force from the bending moment is perceived by the columns of the frame 1 located along the perimeter of the building. The rod 12 with a calibrated bearing capacity is selected so that in it the force from the vertical (asymmetrical part) and wind effects are 1.1-1.3 times less than its carrying capacity. Thus, the building from wind effects and vertical overlap loads works in the elastic stage providing the necessary rigidity of the structure D at wind influences 500. In the case of seismic effects in the rod 12 with a calibrated bearing capacity, the forces increase to its bearing capacity, with their subsequent increase, the rod 12 loses its bearing capacity (loses stability), after which column 1 rests on anchor bolts 13 with cup springs 1. In this the time from the opposite side of the building in the most loaded anchor bolts 13 is increased to the amount of their preliminary tension created by compressing the disc springs 14. With a further increase in the efforts the disc springs gins 14 are starting to shrink. Thus, the building enters a state corresponding to the design state under seismic impact. Due to the reduced rigidity of the building, the loads caused by seismic effects are sharply reduced. A building from twisting (when the masses do not coincide with the central axis of the building is retained-flexible connections 15, made, for example, from prestressed high-strength ropes and located along the perimeter of the building below the zero mark. internal partitions, external cladding and weapon panels, which allows to reduce the cost of restoration work after the earthquake. Formula of the invention building, including columns and girders, forming longitudinal and transverse frames, and diagonal connections located along the perimeter of the building, characterized in that, in order to improve seismic resistance and reduce the cost of restoration work after the earthquake, the frame in the plane of the inner frames is provided with 86 additional inclined columns combined in pairs with bottom ends having a spherical support element in the joint assembly, and foundations for inclined columns are made with a recess for mounting the support element, while the columns located around the perimeter of the building, supported on the foundations by means of a calibrated rod and anchor bolts with cup springs. Sources of information taken into account in the examination of i 1. USSR Author's Certificate No. ,, cl. E 0 H 9/02, 1977. UL FIG. five r-r FIG. 6 Fy