SU1067382A1 - Device for testing building structures - Google Patents

Abstract

A DEVICE FOR TESTING CONSTRUCTION STRUCTURES, including the base, the drive and the load device in the form of upper rollers installed with the ability to interact with the tested design of lower rollers installed in two rows, and the power cable, characterized in that, in order to simplify the design and improve reliability work, it is equipped with an auxiliary cable mounted above the upper rollers with the ability to interact with them, the lower rollers are attached to the base on opposite sides of the tested structure and the power cable is alternately slid obliquely through each lower roller, one row, upper roller, lower roller of another row, and upper roller. sl with:

Description

The invention relates to the construction, in particular to the testing of building structures.

A device for testing building structures is known, comprising a base, a drive and a load device in the form of blocks and a power cable ij.

However, the known device cannot be used to test horizontally installed structures with vertical loads distributed along their length.

The closest technical solution to the invention is a device for testing building structures, including a base, a drive and a load device in the form of upper rollers installed with the possibility of interaction with the tested structure, lower rollers installed in two rows, and a power cable 2J.

The disadvantages of the known device are design complexity and unreliable operation.

The purpose of the invention is to simplify the design and increase reliability.

The goal is achieved by the fact that the device for testing building structures, including the base, the drive and the load device in the form of upper rollers installed with the ability to interact with the tested structure, lower rollers installed in two rows and a power cable, is equipped with an auxiliary cable installed above the upper rollers with the ability to interact with them, the lower rollers are attached to the base on opposite sides of the tested structure, and the power cable is alternately slant inclined through each the lower roller of one row, the upper roller, the lower roller of another row, and the upper roller.

FIG. 1 shows the device, a general view; see 2 - the same, top view; in fig. 3 is the same cross section; in FIG. 4 shows the device, a general view (in the operating state), FIG. 5 - the same, top view; in fig. 6 - the same cross section.

The device consists of a base 1, a drive in the form of weights 2, upper rollers 3, lower rollers 4 installed in two rows, power cable 5, auxiliary cable 6 connected to upper rollers 3, columns 7 for mounting the tested structure 8. Upper rollers 3 are spaced apart from each other by a calculation. In this case, the distance between them may be the same along the entire length of the structure 8 or the same within one of the parts of the structure. Or different. As the load increases, the distance between the rollers 3 decreases, and their number increases. The distance between the lower rollers 4 as well as their number changes accordingly. The rollers 3, suspended from the auxiliary cable b, have supporting elements for interaction

0 with the tested design 8.

The device works as follows.

When testing, the building structure, for example the truss 8, is installed in the space between the rollers and supported on the columns 7 (Figs. 3 and 4). Auxiliary cable 6 is weakened, while the rollers 3 attached to the cable b are mounted on the upper but from farm 8 and fasten them to it. When a load is applied to the power cable 5, it is pulled by a force equal to the weight of the load 2. In the anchor

5 devices attaching the rollers 4 to the base 1, due to the summation of the components arising from the tension of the cable 5, to the left and right of each roller 3 a resultant force is applied, which is also applied to the structure 8. Due to the fact that the structures have limited rigidity, as a result of loading, the structures deflect, their deflection is accompanied by turning

 rollers 3 at a certain angle and lowering the weights 2. After weighting the weights 2 and securing them to a higher point of the power cable, further loading is performed until the structure is destroyed.

When the rollers 4 are located at unequal distances from the tested structure 8, the resultant of the total force applied by the tension of the same power cable 5 to the left and right of the rollers 3 that transfer the load through the supporting element to the test structure 8 is not applied vertically. Because of this, a horizontal component is created which contributes to the MOVEMENT of the tested structure from a vertical plane.

When the two-sided arrangement of the rollers 4 at equal distances x and from the used structure 8, the cable system takes the form of an isosceles triangle (Fig. B). As a result of loading the design of the coaxial system, the system tends to maintain its shape (the shape of an isosceles triangle) due to the equality of the urly left and right rollers 3,

With any random deviation of the 5 test structure 8 cables

the system loses the shape of an isosceles triangle, as a result of which a horizontal component arises, which tends to return the structure to its original position.

////////////////////// /////////////////////////// /.

7 ///// // // 7 ///////

; V

Thus, the proposed device is a self-balancing system that improves the stability of the test structure. The invention allows to simplify the testing and reduce their cost.

///////)one ////////////////// ////

srig2

//// / / // / /// / f ////// 4 / / / // // // // X / / /// //// // // // /// // / //// / Thev4

BUT

/ u /// 1 //) /// //////////////////// ////////////////// /////////

fie.Ь

Claims (1)

DEVICE FOR TESTING CONSTRUCTION STRUCTURES, including a base, a drive and a loading device in the form of upper rollers installed with the possibility of interaction with the tested design of the lower rollers installed in two rows, and a power cable, characterized in that, in order to simplify the design and increase reliability , it is equipped with an auxiliary cable mounted above the upper rollers with the possibility of interaction with them, the lower rollers are attached to the base on opposite sides of the test structure, and the power cable is alternately passed obliquely through each lower roller of one row, the upper roller, the lower roller of the other row and the upper roller. s 6 SU .... 1067382