CN110657977A - Loading support for detecting structural performance of assembled prefabricated staircase - Google Patents
Loading support for detecting structural performance of assembled prefabricated staircase Download PDFInfo
- Publication number
- CN110657977A CN110657977A CN201910974445.2A CN201910974445A CN110657977A CN 110657977 A CN110657977 A CN 110657977A CN 201910974445 A CN201910974445 A CN 201910974445A CN 110657977 A CN110657977 A CN 110657977A
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- support
- eminence
- vertical
- structural performance
- prefabricated staircase
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/02—Stairways; Layouts thereof
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- General Physics & Mathematics (AREA)
- Steps, Ramps, And Handrails (AREA)
Abstract
The invention relates to a loading support for detecting the structural performance of an assembled prefabricated staircase, wherein a high-place support frame of the loading support comprises a vertical support and a transverse support extending along the front-back direction, the vertical support is provided with a plurality of vertical support height adjusting holes arranged at intervals along the up-down direction, the transverse support is provided with a transverse support connecting hole used for being matched with the corresponding vertical support height adjusting hole, the transverse support is connected with the vertical support through a support connecting rod which is detachably arranged in the transverse support connecting hole and the corresponding vertical support height adjusting hole in a penetrating manner, the support connecting rod is horizontally arranged, the top of the transverse support is detachably connected with a high-place support base plate through a top bolt, and the top of the high-place support base plate is provided with a high-place transverse support column used for being matched with. The invention solves the technical problems that the threaded screw cannot bear larger bearing capacity and the thread is easy to damage during loading in the prior art, and can realize structural performance detection under larger load.
Description
Technical Field
The invention relates to a loading bracket for detecting the structural performance of an assembled prefabricated staircase in the technical field of building construction.
Background
The improvement is opened for forty years, and along with the development of the urbanization process and the promotion of novel urbanization in China, the construction industry in China has remarkable achievements in the aspects of technical progress and construction scale, and becomes one of the prop industries of national economy in China. However, the traditional building industry mode has more problems, such as larger resource and energy consumption, serious environmental pollution, lagged industrial technology and the like, and cannot adapt to the theme of green, environment-friendly and low-carbon development in the world at present.
Under the premise of responding to national policies, the assembly type building industry is actively spread in the national building market, and various assembly type component processing factories such as assembly type shear walls, assembly type laminated slabs, assembly type columns, assembly type beams and assembly type stairs also appear like spring shoots after rain. The stair is as main vertical traffic passageway and the green passageway of life in the building structure, plays the effect of the heaviness when earthquake comes. In order to ensure the quality of the construction engineering, corresponding structural performance detection tests are carried out on the prefabricated parts according to a certain sampling proportion when the prefabricated parts enter a construction site, and the detection contents comprise bearing capacity, deflection and crack width. The prefabricated staircase is different from other prefabricated components, and the supporting planes at the two ends of the prefabricated staircase in the actual building structure are not at the same height, so that great difficulty is brought to the detection of the structural performance, and the detection of the structural performance of the prefabricated staircase is realized by means of a special loading device.
The loading device comprises a loading source and a prefabricated staircase loading support, wherein the prefabricated staircase support is composed of vertical supports and parallel supports, the vertical supports are composed of support rod groups, upper cross rods and lower cross rods, cross rods III are fixed above the upper cross rods, cross rods IV are fixed above the lower cross rods, and the heights of the cross rods III and IV are adjusted through vertically arranged screw rods. During the use, adjust the height of horizontal pole III and horizontal pole IV according to the floor height of prefabricated staircase, place prefabricated staircase on detecting the support according to actual installation condition, adopt concentrated load or equipartition load to carry out structural performance to prefabricated staircase and detect.
The problem that this kind of prefabricated stair loading support exists now lies in: when adapting to different prefabricated staircase heights, the support height of vertical support needs to be adjusted, the support height of vertical support is adjusted through three screws arranged along the transverse interval in the prior art, though the stepless adjustment of height can be realized, the dead weight and the loading force of staircase are born through the threaded bolts during the loading test, because the external load that three threaded bolts can bear is very limited, the threads of the bolts are easy to damage, the large bearing capacity test cannot be carried out, the service life of the screws is very short, and the screws need to be frequently replaced.
Disclosure of Invention
The invention aims to provide a loading support for detecting the structural performance of an assembled prefabricated staircase, which aims to solve the technical problems that a threaded screw cannot bear large bearing capacity and the thread on the threaded screw is easily damaged during loading in the prior art.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the utility model provides an assembled prefabricated staircase structural performance detects uses loading support, including controlling the stair low department of arranging and supporting with the stair eminence, the stair eminence is supported and is included the eminence support frame, the eminence support frame includes vertical support and the horizontal support of arranging along the fore-and-aft direction, be provided with a plurality of vertical support altitude mixture control holes of arranging along upper and lower direction interval on the vertical support, be provided with on the horizontal support and be used for with the horizontal support connecting hole that corresponds vertical support altitude mixture control hole cooperation and use, horizontal support links to each other with vertical support through the support connecting rod of removable dress in horizontal support connecting hole and the vertical support altitude mixture control hole of following, the support connecting rod level sets up, the top of horizontal support has the eminence to support the backing plate through top bolt releasable connection, the top of eminence support backing plate is provided.
Spacing muscle of eminence of interval arrangement about the top of eminence support backing plate is provided with, the spacing muscle of eminence and the horizontal support column normal running fit of eminence, and the horizontal support column of eminence is solid cylinder.
Vertical support includes the vertical I-steel post of interval arrangement around, and vertical I-steel post includes left flange board, right flange board and connects the middle web between left and right flange board, and vertical support altitude mixture control hole is seted up on corresponding left flange board and right flange board.
The transverse support comprises two channel steel beams which are arranged at left and right intervals and are respectively arranged on two sides of the vertical I-shaped steel column, and the transverse support connecting hole is formed in the groove bottom of each channel steel beam.
The notches of the two channel steel beams are arranged back to back.
A plurality of reinforcing rib plates which are arranged at intervals in the front-rear direction are arranged in the notches of the channel steel beam.
The top bolts are vertically arranged and are connected with the upper side leg parts of the high-position supporting base plate and the channel steel beam.
The prefabricated staircase loading support further comprises a supporting platform, and both the stair low support and the stair high support are arranged on the supporting platform.
The bottom of vertical support is fixed in on the supporting platform through first rag bolt.
And limiting piers for limiting the left and right movement of the stair low support are fixed on the left and right sides of the stair low support on the supporting platform through second foundation bolts.
The invention has the beneficial effects that: when the height-adjustable stair is used, in the face of prefabricated stairs with different heights, the height of a high-position transverse supporting column needs to be adjusted to be matched with the prefabricated stairs, and as a plurality of prefabricated stairs with different types, specifications and different heights exist, in order to meet the requirements of the prefabricated stairs with different heights, the adjustable range of high-position support of the stairs is wide. During loading, the prefabricated staircase and the loading force are borne by the support connecting rods, and compared with the threaded screw rod in the prior art, the horizontally arranged support connecting rods can bear larger loading force and are not easy to damage.
Drawings
FIG. 1 is a schematic structural view of a loading stand in one embodiment of the present invention;
FIG. 2 is a schematic view of the engagement of the upper support mat with the upper lateral support column of FIG. 1;
FIG. 3 is a schematic view of the lower support beam and the lower lateral support column of FIG. 1;
fig. 4 is a side view of fig. 3.
Detailed Description
An embodiment of a loading bracket for detecting the structural performance of an assembled prefabricated staircase is shown in fig. 1 ~ 4:
the loading support 14 comprises a supporting platform 1, a stair low support 15 and a stair high support 16 which are arranged on the left and right, an inverted T-shaped groove (not shown in the figure) is formed in the supporting platform, an inverted T-shaped block connected with foundation bolts is conveniently filled in the loading support, the stair high support 16 comprises a high support frame, the high support frame comprises a vertical support and a transverse support extending along the front and rear direction, the vertical support comprises vertical I-shaped steel columns 2 arranged at the front and rear sides at intervals, each vertical I-shaped steel column comprises a left flange plate 17, a right flange plate and a middle web plate connected between the left flange plate and the right flange plate, and the bottoms of the vertical I-shaped steel columns are fixed on the supporting platform 1 through first foundation bolts. The left flange plate and the right flange plate of each vertical I-shaped steel column are provided with a front row and a rear row of vertical supporting height adjusting holes 18, and each row of vertical supporting height adjusting holes are formed by a plurality of vertical supporting height adjusting holes which are arranged at intervals along the vertical direction. The transverse support comprises two channel steel beams 19 which are arranged on the left side and the right side at intervals and are respectively arranged on the two sides of the vertical H-shaped steel column, notches of the two channel steel beams are arranged in a back-to-back mode, and a plurality of reinforcing rib plates 3 which are arranged at intervals in the front-to-back direction are welded in the notches of the channel steel beams. Offer on channel-section steel crossbeam 19's the tank bottom be used for with correspond the horizontal support connecting hole that the vertical braces altitude mixture control hole cooperation was used, horizontal support links to each other with vertical braces through removable dress in horizontal support connecting hole and the support connecting rod 8 that corresponds in the vertical braces altitude mixture control hole, and the support connecting rod level sets up, and the axis of support connecting rod extends the setting along controlling the direction, and in this embodiment, the support connecting rod is stud structure, and the both ends threaded connection of support connecting rod has fixation nut. The top of horizontal support has eminence supporting backing plate 4 through top bolt releasable connection, in this embodiment, has seted up upside bolt perforation 20 on the eminence supporting backing plate, sets up the downside bolt perforation that corresponds the setting with the upside bolt perforation on the upside shank of channel-section steel crossbeam, and top bolt 8 wears to adorn in upside bolt perforation and downside bolt perforation. Spacing muscle 10 of eminence of interval arrangement around welded fastening has on the last face of eminence support backing plate, has placed the horizontal support column 5 of eminence that length extends along the fore-and-aft direction between the spacing muscle of eminence, and in this embodiment, the horizontal support column 5 of eminence is solid cylinder structure, but the horizontal support column free rotation of eminence.
The stair low support 15 comprises a low support beam 6 with the length extending along the front-back direction, the low support beam is composed of I-shaped steel and reinforcing rib plates fixed in grooves in two sides of the I-shaped steel in a welding mode, the top of the low support beam is provided with low limiting ribs 11 arranged at the front and back at intervals, a low transverse support column 12 with the length extending along the front-back direction is placed between the low limiting ribs, the low transverse support column is of a solid cylindrical structure, and the low transverse support column can move back and forth. The left side and the right side of the stair low support on the supporting platform are fixed with limiting piers 7 for limiting the left and right movement of the stair low support through second foundation bolts 13, and the left and right positions of the stair low support can be adjusted by changing the left and right positions of the limiting piers.
According to the requirements of the specification 'precast concrete stairway' (JG/T562-2018), the detection of the structural performance of the precast stairway needs to meet the constraint of a fixed hinged support at one end and the constraint of a sliding hinged support at the other end. Aiming at the two support restraining conditions, the corresponding structure of the invention is briefly explained, as shown in fig. 2, when in manufacture, after the high support cushion plate 4 is firmly fixed, the high transverse support pillar 5 is placed at the center line of the high support cushion plate 4; selecting a proper amount of high position limiting ribs 10, placing the high position limiting ribs on the high position supporting base plate 4 and tangent to the high position transverse supporting columns 5; the high position limiting ribs 10 are welded with the high position supporting base plate 4, so that the high position transverse supporting columns can be enabled to generate corner displacement and cannot generate translation displacement in the left and right directions. As shown in fig. 3, the upper surface of the lower support beam 6 can be directly used as the support surface of the sliding hinge support, firstly, the lower transverse support column 12 is placed at the center line of the lower support beam 6, and a plurality of lower limit ribs 11 are welded at positions about 50mm away from the center line, so that the lower limit ribs can protect the sliding hinge support and prevent the lower transverse support column from separating from the upper surface of the lower support beam 6 when the horizontal displacement of the component is too large during loading.
During concrete test, according to the left and right spans of the prefabricated staircase to be detected, the proper position fixing limiting pier is selected to realize the fixing of the support at the lower part of the staircase. According to the height that is detected prefabricated staircase, select to support connecting rod and the cooperation of suitable vertical support altitude mixture control hole, couple together two channel-section steel crossbeams through supporting the connecting rod, also couple together two channel-section steel crossbeams and vertical I-steel post, then on selecting the eminence support backing plate of suitable thickness to be fixed in two channel-section steel crossbeams, support the high-end of prefabricated staircase on the horizontal support column of eminence, support the bottom of prefabricated staircase on the horizontal support column of low department, just can carry out the load test to prefabricated staircase to detect its structural performance. The requirements of the span of different prefabricated stairways are met by the left and right movement of the stair low support, and the prefabricated stairways with different heights are adapted by the position selection of the vertical support height adjusting hole with the proper height and the selection of the high support base plate with the proper thickness, so that the prefabricated staircase loading support has good universality; the prefabricated staircase loading support integrally adopts an assembly type structure, and a staircase low support, each vertical I-shaped steel column, each channel steel beam and a high support base plate can be independently disassembled to facilitate transportation and field assembly; the weight of the prefabricated staircase and the experimental loading force are borne by the supporting connecting rods, and the structural performance detection of the prefabricated staircase under large loading force can be realized.
Claims (10)
1. The utility model provides an assembled prefabricated staircase structural performance detects uses loading support, includes that the low department of stair who arranges about supports and the stair eminence supports, and the stair eminence supports including the eminence support frame, its characterized in that: the eminence support frame includes vertical braces and the horizontal support of arranging along the fore-and-aft direction, be provided with a plurality of vertical braces altitude mixture control holes of following up and down direction interval arrangement on the vertical braces, be provided with on the horizontal braces and be used for with the horizontal brace connecting hole that corresponds vertical braces altitude mixture control hole cooperation and use, horizontal brace links to each other with vertical braces through the support connecting rod of removable wearing in horizontal brace connecting hole and corresponding vertical braces altitude mixture control hole, the support connecting rod level sets up, top bolt releasable connection has the eminence to support the backing plate at the top of horizontal brace, the top of eminence support the backing plate is provided with and is used for supporting complex eminence horizontal brace with the eminence.
2. The loading support for detecting the structural performance of the prefabricated staircase according to the claim 1, characterized in that: spacing muscle of eminence of interval arrangement about the top of eminence support backing plate is provided with, the spacing muscle of eminence and the horizontal support column normal running fit of eminence, and the horizontal support column of eminence is solid cylinder.
3. The loading support for detecting the structural performance of the prefabricated staircase according to the claim 1, characterized in that: vertical support includes the vertical I-steel post of interval arrangement around, and vertical I-steel post includes left flange board, right flange board and connects the middle web between left and right flange board, and vertical support altitude mixture control hole is seted up on corresponding left flange board and right flange board.
4. The loading support for detecting the structural performance of the prefabricated staircase according to the claim 3, wherein: the transverse support comprises two channel steel beams which are arranged at left and right intervals and are respectively arranged on two sides of the vertical I-shaped steel column, and the transverse support connecting hole is formed in the groove bottom of each channel steel beam.
5. The loading support for detecting the structural performance of the prefabricated staircase according to the claim 4, wherein: the notches of the two channel steel beams are arranged back to back.
6. The loading support for detecting the structural performance of the prefabricated staircase according to claim 5, wherein: a plurality of reinforcing rib plates which are arranged at intervals in the front-rear direction are arranged in the notches of the channel steel beam.
7. The loading support for detecting the structural performance of the prefabricated staircase according to the claim 4, wherein: the top bolts are vertically arranged and are connected with the upper side leg parts of the high-position supporting base plate and the channel steel beam.
8. The loading support for detecting the structural performance of the prefabricated staircase according to any one of the claims 1 to 1 ~ 7, wherein the loading support for the prefabricated staircase further comprises a support platform, and both the staircase low support and the staircase high support are arranged on the support platform.
9. The loading support for detecting the structural performance of the prefabricated staircase according to the claim 8, wherein: the bottom of vertical support is fixed in on the supporting platform through first rag bolt.
10. The loading support for detecting the structural performance of the prefabricated staircase according to the claim 8, wherein: and limiting piers for limiting the left and right movement of the stair low support are fixed on the left and right sides of the stair low support on the supporting platform through second foundation bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910974445.2A CN110657977A (en) | 2019-10-14 | 2019-10-14 | Loading support for detecting structural performance of assembled prefabricated staircase |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910974445.2A CN110657977A (en) | 2019-10-14 | 2019-10-14 | Loading support for detecting structural performance of assembled prefabricated staircase |
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| CN110657977A true CN110657977A (en) | 2020-01-07 |
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| CN201910974445.2A Pending CN110657977A (en) | 2019-10-14 | 2019-10-14 | Loading support for detecting structural performance of assembled prefabricated staircase |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112008667A (en) * | 2020-07-22 | 2020-12-01 | 广东省建设工程质量安全检测总站有限公司 | A assembled support frame for prefabricated staircase performance detects |
| CN113375954A (en) * | 2021-07-16 | 2021-09-10 | 江苏和天下节能科技股份有限公司 | Detection apparatus for prefabricated staircase |
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