CN104330276B - Measure ceiling support system Ultimate Strength Test method - Google Patents
Measure ceiling support system Ultimate Strength Test method Download PDFInfo
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- CN104330276B CN104330276B CN201410631318.XA CN201410631318A CN104330276B CN 104330276 B CN104330276 B CN 104330276B CN 201410631318 A CN201410631318 A CN 201410631318A CN 104330276 B CN104330276 B CN 104330276B
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Abstract
The present invention relates to a kind of building field ultimate bearing force measuring method, specifically, relate to a kind of measurement ceiling support system Ultimate Strength Test method, be fixed on flooring by ceiling support structural system is inverted, and panel is fixed on the upper face of main joist and false keel, special loading equipemtn is set, loading equipemtn and ceiling support structural system and panel fixed, adopt ceiling support structural system anastrophe, and downward pressure is applied to it, simulate in existing decorative ceiling structure, wind action produces negative blast upwards to furred ceiling, solve in existing decorative ceiling engineering, cannot the problem of support ultimate bearing capacity of Measurement accuracy ceiling support structural system.
Description
Technical field
The present invention relates to a kind of building field ultimate bearing force measuring method, specifically, relate to a kind of measurement ceiling support system Ultimate Strength Test method.
Background technology
Along with the multidimensional in current public building space changes, in furred ceiling, equipment increases gradually, the span of the ceiling void is increasing, highly more and more higher, the furred ceiling engineering of large span large space also gets more and more, the technical matters of the ceiling construction thereupon occurred also gets more and more, because ceiling is subject to thrust upwards or under the effect of negative blast, owing to hanging the long insufficient rigidity of muscle, certain flexural deformation will be produced, thus cause whole ceiling system to be upwards out of shape or transversely deforming, be easy to cause ceiling system unbalance, cause that ceiling surface is uneven even buries the problems such as potential safety hazard.
In order to solve the problem, existing comparatively general way is: when ceiling height is larger (more than 1.5m), add counter support in construction; Or ceiling height larger time (more than 3m), add shaped steel conversion layer in construction and support the method head it off of (namely changing support).
But for how to add counter support or how to add shaped steel conversion layer in this process of building support, in reality operation can the related specifications of reference fuzzy, general, only at " " Code for construction quality acceptance of building decoration " (GB50210-2001) chapter 6 furred ceiling engineering 6.1.11 bar: when being greater than 1.5m when length of boom, should counter support be arranged." there is relevant statement, then without other design or construction requirement; Designing unit arranges ceiling support and is not also very familiar to, and arrange unreasonable or relatively conservative in the design, there is larger design defect, and instruct without corresponding atlas, operability is not strong, causes the setting of current ceiling support very chaotic.When large space ceiling support setting space is bigger than normal or it is too small to support type selecting, easily cause furred ceiling to be out of shape comparatively large, local instability etc., cause furred ceiling to be out of shape, ftracture, and the maintenance cost in later stage is higher; When support setting space is less than normal, constructing operation faciostenosis, is unfavorable for that installation operates, schedule delays, and steel using amount is excessive causes waste.The research of current building trade to large space ceiling support system is also less, research both domestic and external is in vacuum state substantially, need a kind of ultimate bearing capacity of test method determination ceiling support system badly, to grasp the true bearing capacity of different spacing, model ceiling support.
China Patent No. CN202466923U discloses a kind of suspended ceiling reverse support, comprise counter support shaped steel and counter support suspension rod, and counter support shaped steel length is less than or equal to 1200 millimeters, counter support length of boom is less than or equal to 300 millimeters, but this patent is only limitted to the structure composition of openly a kind of counter support, and this structure unexposed forms the ultimate bearing capacity that can bear.China Patent No. CN103993693A discloses a kind of large space suspended ceiling reverse support method to set up, by carrying out the arrangement of Mechanical Calculation and Analysis and design suspension rod and counter support to catching device, the characteristi cvalue o fwindload Wk of the limit characteristi cvalue o fwindload W that can bear according to the furred ceiling calculated and the local designing requirement of furred ceiling compares, if W>Wk, then this suspended ceiling reverse support method to set up is adopted to design ceiling structure.Although this suspended ceiling reverse support demonstrates this counter support reliability of structure by computation and analysis, result of calculation is only confined to theoretical research, still to be tested to the reference value of Practical Project example.
Summary of the invention
The object of this invention is to provide a kind of measurement ceiling support system Ultimate Strength Test method, by ceiling support structural system is inverted method of exerting pressure, in conjunction with test point shift value, obtain the ultimate bearing capacity of ceiling support structural system, for engineering practice provides guidance instruction.
Technical scheme of the present invention is: a kind of measurement ceiling support system Ultimate Strength Test method, comprises following methods step:
(1) ceiling support structural system is built;
(2) described ceiling support structural system is inverted is fixed on flooring, be set up by the main joist of described ceiling support structural system and false keel end, the suspension rod of described ceiling support structural system and support end put down, and is fixedly connected with flooring;
(3) panel is fixed on the upper face of main joist and false keel;
(4) loading equipemtn is positioned over the main joist of described ceiling support structural system and the positive top of false keel end, and by described loading equipemtn and described ceiling support structural system and described panel fixed;
(5) dial gauge is installed on the measurement point preset;
(6) described loading equipemtn is evenly exerted pressure according to certain loaded load, often load and once hold lotus a period of time, and record current dial gauge shift value;
(7) continue to load, and observe described ceiling support structural system change in displacement, when described ceiling support structural system occurs bending, loaded load reduces, and when being loaded on described ceiling support structural system and destroying, records final dial gauge shift value S;
(8) according to final dial gauge shift value S and loaded load value, the ultimate bearing capacity F of described ceiling support structural system is obtained.
Ceiling support structural system in described step (1) is reinforced counter support structural system, this reinforced counter support structural system comprises suspension rod, reinforced counter support, false keel and main joist, described main joist is connected for vertical with described false keel, described suspension rod is all connected with described main joist is vertical with the lower end of described reinforced counter support, described suspension rod and described reinforced counter support are along described main joist direction adopting the laying mode of to establish every, namely a suspension rod is often set and sets up a reinforced counter support, described suspension rod and described reinforced counter support along with described main joist vertical direction on adopt the laying mode of to establish every three, namely three suspension rods are often set and set up a reinforced counter support.Described reinforced counter support is made up of angle steel and reinforcing bar suspension rod, and described reinforcing bar suspension rod is full silk suspension rod, and the upper end of described angle steel lower end and described full silk suspension rod is by being welded to connect, and the lower end of described full silk suspension rod is fixedly connected with main joist by suspender member.When described reinforced counter support structural system inversion being fixed on flooring according to step (2), be set up by the main joist of described reinforced counter support structural system and false keel, loading equipemtn is placed and is fixed on the described main joist of reinforced counter support structural system and the positive top of false keel end, the suspension rod of described ceiling support structural system and reinforced counter support are put down, and described suspension rod is fixedly connected with flooring with reinforced counter support.
Ceiling support structural system in described step (1) is conversion Bracing Systems, this conversion Bracing Systems comprises suspension rod, angle steel, false keel and main joist, described main joist is connected for vertical with described false keel, described suspension rod upper end is fixedly connected with described angle steel, and described suspension rod lower end is connected with described main joist is vertical.When described conversion Bracing Systems inversion being fixed on flooring according to step (2), be set up by the main joist of described conversion Bracing Systems and false keel, loading equipemtn is placed and is fixed on the main joist of described conversion Bracing Systems and the positive top of false keel end, the angle steel of described conversion Bracing Systems is put down, and described angle steel is fixedly connected with flooring.
Loading equipemtn in described step (3) is for adding sand equipment or adding wetting system, the described sand equipment that adds is that the square of surrounding band enclosing adds sand container, the described outside mark adding sand container has scale value, when exerting pressure, this is added to sand equipment and quantitatively adds sand, and lay evenly, and record current dial gauge shift value.The described wetting system that adds is square leakproof water filling container, and the outside of described water filling container mark has scale value, when exerting pressure, this is added to wetting system and carries out quantitative watering, and record current dial gauge shift value.
The measurement point of setting is arranged at the mid point of described main joist, angle point and limit mid point respectively in described step (4), carries out multimetering, increase the reliability and accuracy measured to measurement point multiple in loading procedure.
The present invention's beneficial effect is compared with prior art:
(1) this measurement ceiling support system Ultimate Strength Test method, be fixed on flooring by ceiling support structural system is inverted, and panel is fixed on the upper face of main joist and false keel, special loading equipemtn is set, loading equipemtn and ceiling support structural system and panel fixed, adopt ceiling support structural system anastrophe, and downward pressure is applied to it, simulate in existing decorative ceiling structure, wind action produces negative blast upwards to furred ceiling, solve in existing decorative ceiling engineering, cannot the problem of support ultimate bearing capacity of Measurement accuracy ceiling support structural system,
(2) loading equipemtn is adopted evenly to exert pressure according to certain loaded load, loading equipemtn is for adding sand equipment or adding wetting system, the requirement of evenly exerting pressure can be reached, by the current dial gauge shift value of dial gauge record, when being loaded on ceiling support structural system and destroying, can obtain the ultimate bearing capacity F of ceiling support structural system, test mode is efficient and convenient, practical, and test accurately, plays good directive function in Practical Project decorative ceiling.
Accompanying drawing explanation
Fig. 1 is the layout schematic diagram of reinforced counter support structural system;
Fig. 2 is that reinforced counter support structural system of the present invention is inverted schematic diagram;
Fig. 3 is the layout schematic diagram of conversion Bracing Systems;
Fig. 4 is that conversion Bracing Systems of the present invention is inverted schematic diagram.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the embodiment of a part of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those skilled in the art obtain under the prerequisite of not making creative work, all belongs to protection scope of the present invention.
Embodiment 1
A kind of measurement ceiling support system Ultimate Strength Test method, comprises following methods step:
(1) ceiling support structural system is built;
See Fig. 1 and Fig. 2.This ceiling support structural system is reinforced counter support structural system, this reinforced counter support structural system comprises suspension rod 101, reinforced counter support 102, false keel 103 and main joist 104, main joist 104 is connected for vertical with false keel 103, suspension rod 101 is all connected with main joist 104 is vertical with the lower end of reinforced counter support 102, suspension rod 101 and reinforced counter support 102 are along main joist 104 direction adopting the laying mode of to establish every, namely a suspension rod 101 is often set and sets up a reinforced counter support 102, suspension rod 101 and reinforced counter support 102 along with main joist 104 vertical direction on adopt the laying mode of to establish every three, namely three suspension rods 101 are often set and set up a reinforced counter support 102, the setting space of suspension rod 101 and reinforced counter support 102 is 1.0m*1.0m.Reinforced counter support 101 is made up of angle steel 105 and reinforcing bar suspension rod 106, and reinforcing bar suspension rod 106 is full silk suspension rod, and the upper end of angle steel 105 lower end and described full silk suspension rod 106 is by being welded to connect, and the lower end of full silk suspension rod 106 is fixedly connected with main joist 104.
Embodiment 1 is for choosing 4*4m in reinforced counter support structural system
2structural unit.See Fig. 1 and Fig. 2, at 4*4m
2in reinforced counter support fabric architecture unit, suspension rod quantity is 18, and reinforced counter support quantity is 7, and table 1 is the structural parameters of the reinforced counter support structural system that embodiment 1 adopts:
The structural parameters of the reinforced counter support structural system of table 1
Wherein, suspension rod edge point weight is 1/2g
a; Suspension rod angle point weight is 1/4g
a;
Reinforced counter support edge point weight is 1/2g
b; Reinforced counter support angle point weight is 1/4g
b.
(2) ceiling support structural system is inverted is fixed on flooring 107, be set up by the main joist of ceiling support structural system and false keel end, the suspension rod end of ceiling support structural system put down, and is fixedly connected with flooring;
(3) panel 108 is fixed on the upper face of main joist 104 and false keel 103, panel 108 is lightweight plank, and weight is 1.56kg/m
2;
(4) loading equipemtn is positioned over the main joist of ceiling support structural system and the positive top of false keel end, and by loading equipemtn and ceiling support structural system and panel 108 fixed, the general assembly (TW) of loading equipemtn and panel 108 is 1.56kg/m
2, the loading equipemtn of this embodiment adopts and adds sand equipment, and adding sand equipment is that the square of surrounding band enclosing adds sand container, and the outside mark adding sand container has scale value, when exerting pressure, this is added to sand equipment and quantitatively adds sand, and lay evenly;
(5) dial gauge is installed on the measurement point preset, in order to measure the vertical displacement of ceiling support structural system, the measurement point of setting is arranged at the mid point of main joist, angle point and limit mid point respectively, also multimetering is carried out to measurement point multiple in loading procedure, increase the reliability and accuracy measured;
(6) loading equipemtn is evenly exerted pressure according to certain loaded load, often load and once hold lotus a period of time, and record current dial gauge shift value;
(7) continue to load, and observe ceiling support structural system change in displacement, when ceiling support structural system occurs bending, loaded load reduces, when the load weight adding sand is G, ceiling support structural system is destroyed, and records the dial gauge shift value S of now main joist mid point;
(8) according to final dial gauge shift value S and loaded load value G, the ultimate bearing capacity F of inverted ceiling support structural system is obtained
fall, in conjunction with Practical Project decorative ceiling structural system, finally obtain the ultimate bearing capacity F of actual ceiling support structural system.
Wherein, this ceiling support fabric architecture deadweight N
gfor main joist deadweight, false keel deadweight, reinforced counter support is conducted oneself with dignity, suspension rod is conducted oneself with dignity, loading equipemtn is conducted oneself with dignity and the general assembly (TW) of panel deadweight, and computation process can ignore the weight of web member.
In the ultimate bearing capacity F process obtaining step (8) ceiling support structural system, because of inverted ceiling support fabric architecture deadweight N
gdirection is vertically downward, and the negative blast N of Practical Project decorative ceiling
ffor vertically upward, in the Ultimate Strength process of therefore Practical Project decorative ceiling, considering the negative blast N that furred ceiling bears
fwhile, also should take into full account ceiling support fabric architecture deadweight N
g, i.e. the ultimate bearing capacity F=(2N of actual ceiling support structural system
g+ N
f)/(4*4m
2).
The 4*4m of table 2 for obtaining when taking into full account and be inverted the deadweight of topmast support structure architecture
2the test figure of reinforced counter support structural system:
Table 2 4*4m
2the test figure of reinforced counter support structural system
Embodiment 2
The measurement ceiling support system Ultimate Strength Test Methods and steps of embodiment 2 is substantially the same manner as Example 1, difference step is: what the loading equipemtn in step (4) adopted is add wetting system, adding wetting system is square leakproof water filling container, the outside mark of water filling container has scale value, when exerting pressure, this is added to wetting system and carries out quantitative watering, and the equipment level that ensures to add water is placed.
Embodiment 3
The measurement ceiling support system Ultimate Strength Test Methods and steps of embodiment 3 is substantially the same manner as Example 1, difference step is: the ceiling support structural system in step (1) is conversion Bracing Systems, see Fig. 3 and Fig. 4, this conversion Bracing Systems comprises suspension rod 201, angle steel 202, false keel 203 and main joist 204, main joist 204 is connected for vertical with described false keel 203, suspension rod 201 upper end is fixedly connected with described angle steel 202, and suspension rod 201 lower end is connected with described main joist 204 is vertical.When the inversion of conversion Bracing Systems being fixed on flooring 205 according to step (2), the main joist 204 and the false keel 203 that are about to conversion Bracing Systems are set up, loading equipemtn is placed and is fixed on the conversion main joist of Bracing Systems and the positive top of false keel end, the angle steel 202 of conversion Bracing Systems is put down, and angle steel 202 is fixedly connected with flooring 205.
Embodiment 3 is for choosing 2.4*2.4m in conversion Bracing Systems
2structural unit.See Fig. 3 and Fig. 4, at conversion Bracing Systems 2.4*2.4m
2in structural unit, suspension rod 201 quantity is 18, and angle steel 202 quantity is 7, and table 3 is the structural parameters of the conversion Bracing Systems that embodiment 3 adopts:
The structural parameters of Bracing Systems changed by table 3
Wherein, in step (3), panel 206 adopts Double-layer wooden thin plate, and the general assembly (TW) of Double-layer wooden thin plate and loading equipemtn is 9kg.The measurement point chosen in step (5) has 4, and measurement point 1 and measurement point 3 choose the center position of main joist total length respectively, and measurement point 2 and measurement point 4 choose 1/4 position of main joist total length.
Wherein, this conversion Bracing Systems dead load N
gfor main joist deadweight, false keel deadweight, suspension rod is conducted oneself with dignity, angle steel is conducted oneself with dignity, Double-layer wooden thin plate is conducted oneself with dignity and the general assembly (TW) of loading equipemtn deadweight, and computation process can ignore the weight of web member.
The 2.4*2.4m of table 4 for obtaining when taking into full account and be inverted the deadweight of topmast support structure architecture
2the test figure of conversion Bracing Systems:
Table 4 2.4*2.4m
2the test figure of conversion Bracing Systems
Embodiment 4
The measurement ceiling support system Ultimate Strength Test Methods and steps of embodiment 4 is substantially the same manner as Example 1, difference step is: what the loading equipemtn in step (4) adopted is add wetting system, adding wetting system is square leakproof water filling container, the outside mark of water filling container has scale value, when exerting pressure, this is added to wetting system and carries out quantitative watering, and the equipment level that ensures to add water is placed.
It will be appreciated by those skilled in the art that, in the measurement ceiling support system Ultimate Strength Test method step of embodiment 1-embodiment 4, along with the increase of imposed load, there are 3 stages altogether in suspension rod and main joist, elastic stage, distortion stage and the stage of collapsing, when obtained by embodiment 1-embodiment 4 step suspension rod or main joist reach collapse time, the ultimate bearing capacity of corresponding ceiling support structural system can be obtained, test mode is efficient and convenient, practical, and testing precision is high, play good directive function in Practical Project decorative ceiling.
Those skilled in the art can understand the schematic diagram that accompanying drawing is only a preferred embodiment, and the workflow in accompanying drawing might not be that enforcement the present invention is necessary.
It is last it is noted that above embodiment is only for illustration of technical scheme of the present invention, but not be limited, although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (7)
1. measure a ceiling support system Ultimate Strength Test method, it is characterized in that, comprise following methods step:
(1) ceiling support structural system is built;
(2) described ceiling support structural system inversion is fixed on flooring, the main joist of described ceiling support structural system and false keel end is set up, the suspension rod of described ceiling support structural system and support end is put down, and is fixedly connected with flooring;
(3) panel is fixed on the upper face of main joist and false keel;
(4) loading equipemtn is positioned over the main joist of described ceiling support structural system and the positive top of false keel end, and by described loading equipemtn and described ceiling support structural system and described panel fixed;
(5) dial gauge is installed on the measurement point preset;
(6) described loading equipemtn is evenly exerted pressure according to certain loaded load, often load and once hold lotus a period of time, and record current dial gauge shift value;
(7) continue to load, and observe described ceiling support structural system change in displacement, when described ceiling support structural system occurs bending, loaded load reduces, and when being loaded on described ceiling support structural system and destroying, records final dial gauge shift value S;
(8) according to final dial gauge shift value S and loaded load value, the ultimate bearing capacity F of described ceiling support structural system is obtained.
2. measurement ceiling support system Ultimate Strength Test method according to claim 1, it is characterized in that: the ceiling support structural system in described step (1) is reinforced counter support structural system, this reinforced counter support structural system comprises suspension rod, reinforced counter support, false keel and main joist, described main joist is connected for vertical with described false keel, described suspension rod is all connected with described main joist is vertical with the lower end of described reinforced counter support, described suspension rod and described reinforced counter support are along described main joist direction adopting the laying mode of to establish every, a suspension rod is often set and sets up a reinforced counter support, described suspension rod and described reinforced counter support along with described main joist vertical direction on adopt the laying mode of to establish every three, three suspension rods are often set and set up a reinforced counter support.
3. measurement ceiling support system Ultimate Strength Test method according to claim 2, it is characterized in that: described reinforced counter support is made up of angle steel and reinforcing bar suspension rod, described reinforcing bar suspension rod is full silk suspension rod, the upper end of described angle steel lower end and described full silk suspension rod is by being welded to connect, and the lower end of described full silk suspension rod is fixedly connected with main joist by suspender member.
4. measurement ceiling support system Ultimate Strength Test method according to claim 1, it is characterized in that: the ceiling support structural system in described step (1) is conversion Bracing Systems, this conversion Bracing Systems comprises suspension rod, angle steel, false keel and main joist, described main joist is connected for vertical with described false keel, described suspension rod upper end is fixedly connected with described angle steel, and described suspension rod lower end is connected with described main joist is vertical.
5. measurement ceiling support system Ultimate Strength Test method according to claim 1, it is characterized in that: the loading equipemtn in described step (4) is for adding sand equipment, the described sand equipment that adds is that the square of surrounding band enclosing adds sand container, described in add sand container outside mark have scale value.
6. measurement ceiling support system Ultimate Strength Test method according to claim 1, it is characterized in that: the loading equipemtn in described step (4) is for adding wetting system, the described wetting system that adds is square leakproof water filling container, and the outside mark of described water filling container has scale value.
7. measurement ceiling support system Ultimate Strength Test method according to claim 1, is characterized in that: the measurement point of the middle setting of described step (5) is arranged at the mid point of described main joist, angle point and limit mid point respectively.
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Inventor after: Li Zhaolong Inventor after: Yang Suchun Inventor after: Jia Yang Inventor after: Zhen Zhonghua Inventor after: Wang Xiaoqin Inventor after: Duan Liangyou Inventor before: Li Zhaolong Inventor before: Yang Suchun Inventor before: Jia Yang |
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Free format text: CORRECT: INVENTOR; FROM: LI ZHAOLONG YANG SUCHUN JIA YANG TO: LI ZHAOLONG YANG SUCHUN JIA YANG ZHEN ZHONGHUA WANG XIAOQIN DUAN LIANGYOU |
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Address after: 266000 Shandong province Qingdao City, Shandong Road No. 168 Patentee after: ZHONGQING JIANAN CONSTRUCTION GROUP Co.,Ltd. Address before: 266000 Shandong Province, Qingdao city Shandong Road No. 16 building 26 Patentee before: QINGDAO JIANAN CONSTRUCTION GROUP Co.,Ltd. |
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