CN103792059A - Segmented model box by using multiple-point vibration table to simulate non-uniform excitation of underground structure - Google Patents
Segmented model box by using multiple-point vibration table to simulate non-uniform excitation of underground structure Download PDFInfo
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- CN103792059A CN103792059A CN201210421181.6A CN201210421181A CN103792059A CN 103792059 A CN103792059 A CN 103792059A CN 201210421181 A CN201210421181 A CN 201210421181A CN 103792059 A CN103792059 A CN 103792059A
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Abstract
The invention relates to a segmented model box by using a multiple-point vibration table to simulate non-uniform excitation of an underground structure. The model box comprises end head soil boxes, intermediate soil boxes and soil box joints; a plurality of intermediate soil boxes exist; the plurality of intermediate soil boxes are sequentially connected between the end head soil boxes at two sides; the intermediate soil boxes are connected with the end head soil boxes through the soil box joints; and the plurality of intermediate soil boxes are connected with one another through the soil box joints; a part of the end head soil boxes and the intermediate soil boxes are fixed on the vibration table so as to be adopted as driving soil boxes, and the other soil boxes are adopted as driven soil boxes; and the bottoms of the driven soil boxes are provided with slide supporting seats which enable the driven soil boxes to slide horizontally. Compared with the prior art, the segmented model box of the invention has the advantages of firm structure, accurate measurement and the like.
Description
Technical field
The present invention relates to a kind of model test apparatus of simulation tunnel seismic response, the shaking table model device that particularly simulation tunnel structure responds under non-uniform geological process.
Background technology
Along with the generation of underground structure earthquake, the correlative study of underground structure antidetonation has been subject to paying attention to widely.Shaking table model is the important method of carrying out Earthquake Analysis of Underground Structures, has obtained using widely and approving.An important difference of underground structure and superstructure seismic response is, underground structure is positioned among rock soil medium, and under geological process, structure and rock soil medium interact, and show different vibration characteristics.By place model rock-soil material and underground structure model in native case, can simulate formation structure and the interaction of rock soil medium, for the response of Study of The Underground structural earthquake and earthquake mechanism, have great importance.Therefore test is necessity equipment that carries out underground structure vibration bench test with native case.Due to the heterogeneity of geologic condition and the wave characteristic of seismic wave propagation, under geological process, tunnel, except be subject to the impact of rock soil medium distortion in section direction, longitudinal along tunnel, also will be subject to the impact of rock soil medium detrusion and crawling effect.The shaking table experiment of past tunnel structure is due to the restriction of condition, be mainly confined to simulate consistent excitation with or the impact of vertical direction detrusion on tunnel cross-section.Along with coming into operation of multiple spot shaking table, the shaking table model of carrying out longitudinal non-uniform excitation for tunnel structure entirety has become possibility, and this has proposed new requirement for model experiment by the performance of native case.
The native case of a kind of widely used experiment is rigidity soil case, and the people such as domestic professor Yang Linde once used rigidity soil case to carry out shaketalle test to underground shield tunnel section.Rigidity soil case can use the seismic response of single Research on Shaking Table for Simulating underground structure under consistent incentive action.Rigidity soil case deficiency is not possess deformability, can not simulate place non-uniform distortion impact on tunnel structure under geological process.
The native case of another kind of widely used experiment is shearing native case.Shearing native case, by using single shaking table, can be simulated rock soil medium in the distortion perpendicular to ground direction, thereby tunnel structure section is formed to shear action.The deficiency of shearing native case is to simulate the non-uniform excitation effect longitudinal along tunnel, can not consider the creeping deformation that soil layer is longitudinal, can not be used for the experiment of multiple spot shaking table.
Summary of the invention
Object of the present invention is exactly to provide a kind of sound construction in order to overcome the defect that above-mentioned prior art exists, measure and utilize accurately the non-sectional type model casing of excitation always of multiple spot Research on Shaking Table for Simulating underground structure.
Object of the present invention can be achieved through the following technical solutions: a kind of non-sectional type model casing of excitation always of multiple spot Research on Shaking Table for Simulating underground structure that utilizes, it is characterized in that, this model casing comprises termination soil case, middle native case and native case joint, the native case in described centre is provided with multiple, the native case in multiple centres is connected between the soil case of termination, both sides successively, between middle native case and termination soil case and connect by native case joint between the native case in multiple centre, a part in described termination soil case and middle native case is fixed on shaking table as the native case of active, all the other native casees are as from the case of breaking ground, from breaking ground, the sliding support that can make its horizontal slip is installed in case bottom.
Described active soil case and can be positioned at termination or centre from the case of breaking ground.
Active soil case interval on described shaking table arranges, and between every two native casees of active, arranges one from the case of breaking ground.
Described termination Tu Xiangyou bottom surface steel plate and three lateral support steel plates composition, the native case in described centre is made up of the bottom surface steel plate side steel plate relative with two, and two termination soil casees and the native case in multiple centre surround the support system of uncovered rectangular box.
The native case in described centre is provided with at least one.
The native case in described centre is provided with 2～10.
Described active soil case and be equipped with bolt hole from the case bottom of breaking ground, for being connected with shaking table or sliding part.
Described native case joint is joint rotatable and that longitudinally slide.
Described active soil case and all adopt Plate Welding to make from the sidewall of the case of breaking ground, and reinforce by shaped steel.Soil case Rigidity and strength need, by checking computations, meet the demand of experiment.
Described active soil case and certainly shaking the predominant period that frequency is greater than model clay from the case of breaking ground.
When work, shaking table, by the native case inputted vibration of active, is delivered to from the case of breaking ground by native case joint.Initiatively native case and pass to tunnel structure by model clay from the vibration of the case of breaking ground, simulates non-uniform geological process.
Compared with prior art, the present invention has the following advantages:
(1) sound construction, in order to avoid casing unstable failure in exciting process;
(2) avoid model casing and model clay to resonate because the natural frequency of vibration is close, affect thus the value of metric data;
(3), by the discrete input of multiple spot shaking table, be converted into approximate non-uniform input, the seismic response of simulation tunnel under non-uniform excitation.
Accompanying drawing explanation
Fig. 1 is the structural representation of the model casing in embodiment 1;
Fig. 2 is the structural representation of termination soil case;
Fig. 3 is the structural representation of middle native case.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
In the present embodiment by 4 shaking tables and the non-uniform geological process of model casing simulation tunnel structure.As shown in Figures 1 to 3, model casing is made up of two termination soil casees 5 and middle five native casees 6 in centre at two.Described termination soil case 5 is made up of bottom surface steel plate and three lateral support steel plates, the native case 6 in described centre is made up of the bottom surface steel plate side steel plate relative with two, termination soil case and middle native case bottom are equipped with bolt hole, for being connected with shaking table or sliding part, between middle native case 6 and termination soil case 5 and connect by native case joint 3 between the native case in multiple centre, two termination soil casees 5 and five native casees 6 in centre surround the support system of uncovered rectangular box.Wherein two termination soil casees and two native casees in centre are fixed on four and are fixed on shaking table 4 as the native case 1 of active, all the other native casees are as from the case 2 of breaking ground, from breaking ground, the sliding support that can make its horizontal slip is installed in case 2 bottoms, initiatively native case 1 interval is arranged, between the native case 1 of every two actives, 1, interval is from the case 2 of breaking ground.
Single native case (comprising termination soil case 5 and middle native case 6) is long is of a size of long 10 meters, wide 3 meters, long 70 meters of the support system entirety that native case forms.In experiment, 4 shaking tables, according to research needs, are input to initiatively native case 1 by different seismic events, and the case of being broken ground vibrates under the drive of the native case of both sides active.
Initiatively native case 1 and adopt steel plate and shaped steel welding from the case 2 of breaking ground.Initiatively native case 1 is secured by bolts on shaking table, is placed on the making of sliding from the case 2 of breaking ground.Soil case joint 3 can rotate and slip longitudinally, does not laterally relatively move, and native case joint 3 is calculated and met requirement of experiment by intensity.
A kind of non-sectional type model casing of excitation always of multiple spot Research on Shaking Table for Simulating underground structure that utilizes, this model casing comprises termination soil case, middle native case and native case joint, the native case in described centre is provided with 1, native case two ends, this centre are connected between the soil case of termination, both sides by native case joint, the native case in described centre is fixed on shaking table as the native case of active, termination, both sides soil case, as from the case of breaking ground, can make the sliding support of its horizontal slip from the case bottom installation of breaking ground.
Described termination Tu Xiangyou bottom surface steel plate and three lateral support steel plates composition, the native case in described centre is made up of the bottom surface steel plate side steel plate relative with two, and two termination soil casees and the native case in multiple centre surround the support system of uncovered rectangular box.
Described active soil case and be equipped with bolt hole from the case bottom of breaking ground, for being connected with shaking table or sliding part.
Described native case joint is joint rotatable and that longitudinally slide.
Described active soil case and all adopt Plate Welding to make from the sidewall of the case of breaking ground, and reinforce by shaped steel.Soil case Rigidity and strength need, by checking computations, meet the demand of experiment.
Described active soil case and certainly shaking the predominant period that frequency is greater than model clay from the case of breaking ground.
When work, shaking table, by the native case inputted vibration of active, is delivered to from the case of breaking ground by native case joint.Initiatively native case and pass to tunnel structure by model clay from the vibration of the case of breaking ground, simulates non-uniform geological process.
Embodiment 3
The native case in described centre is provided with 2, and all the other are with embodiment 1.
The native case in described centre is provided with 10, and all the other are with embodiment 1.
Claims (10)
1. one kind is utilized the non-sectional type model casing of excitation always of multiple spot Research on Shaking Table for Simulating underground structure, it is characterized in that, this model casing comprises termination soil case, middle native case and native case joint, the native case in described centre is provided with multiple, the native case in multiple centres is connected between the soil case of termination, both sides successively, between middle native case and termination soil case and connect by native case joint between the native case in multiple centre, a part in described termination soil case and middle native case is fixed on shaking table as the native case of active, all the other native casees are as from the case of breaking ground, from breaking ground, the sliding support that can make its horizontal slip is installed in case bottom.
2. a kind of non-sectional type model casing of excitation always of multiple spot Research on Shaking Table for Simulating underground structure that utilizes according to claim 1, is characterized in that, described active soil case and can be positioned at termination or centre from the case of breaking ground.
3. a kind of non-sectional type model casing of excitation always of multiple spot Research on Shaking Table for Simulating underground structure that utilizes according to claim 1, is characterized in that, the active soil case interval on described shaking table arranges, and between every two native casees of active, arranges one from the case of breaking ground.
4. a kind of non-sectional type model casing of excitation always of multiple spot Research on Shaking Table for Simulating underground structure that utilizes according to claim 1, it is characterized in that, described termination Tu Xiangyou bottom surface steel plate and three lateral support steel plate compositions, the native case in described centre is made up of the bottom surface steel plate side steel plate relative with two, and two terminations soil case and the native case in multiple centre surround the support system of uncovered rectangular box.
5. a kind of non-sectional type model casing of excitation always of multiple spot Research on Shaking Table for Simulating underground structure that utilizes according to claim 1, is characterized in that, the native case in described centre is provided with at least one.
According to claim 1 or 5 a kind of utilize multiple spot Research on Shaking Table for Simulating underground structure non-always excitation sectional type model casing, it is characterized in that, the native case in described centre is provided with 2～10.
7. a kind of non-sectional type model casing of excitation always of multiple spot Research on Shaking Table for Simulating underground structure that utilizes according to claim 1, is characterized in that, described active soil case and be equipped with bolt hole from the case bottom of breaking ground, for being connected with shaking table or sliding part.
8. a kind of non-sectional type model casing of excitation always of multiple spot Research on Shaking Table for Simulating underground structure that utilizes according to claim 1, is characterized in that, described native case joint is joint rotatable and that longitudinally slide.
9. a kind of non-sectional type model casing of excitation always of multiple spot Research on Shaking Table for Simulating underground structure that utilizes according to claim 1, is characterized in that, described active soil case and all adopt Plate Welding to make from the sidewall of the case of breaking ground, and reinforce by shaped steel.
10. a kind of non-sectional type model casing of excitation always of multiple spot Research on Shaking Table for Simulating underground structure that utilizes according to claim 1, is characterized in that described active soil case and certainly shaking the predominant period that frequency is greater than model clay from the case of breaking ground.
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Cited By (4)
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|---|---|---|---|---|
| CN108957537A (en) * | 2018-06-20 | 2018-12-07 | 西安理工大学 | Tilt the calculation method of site predominant period under ground seismic wave function |
| CN109322656A (en) * | 2018-11-09 | 2019-02-12 | 中南大学 | Multiple spot Research on Shaking Table for Simulating underground structure non-uniform method connects system with model casing |
| CN109632225A (en) * | 2018-12-29 | 2019-04-16 | 武汉理工大学 | A kind of single shaketalle test shearing case considering row wave effect |
| CN114543875A (en) * | 2022-01-13 | 2022-05-27 | 中国民用航空飞行学院 | Anti-interference satellite navigation equipment detecting system of big dipper |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108957537A (en) * | 2018-06-20 | 2018-12-07 | 西安理工大学 | Tilt the calculation method of site predominant period under ground seismic wave function |
| CN109322656A (en) * | 2018-11-09 | 2019-02-12 | 中南大学 | Multiple spot Research on Shaking Table for Simulating underground structure non-uniform method connects system with model casing |
| CN109632225A (en) * | 2018-12-29 | 2019-04-16 | 武汉理工大学 | A kind of single shaketalle test shearing case considering row wave effect |
| CN114543875A (en) * | 2022-01-13 | 2022-05-27 | 中国民用航空飞行学院 | Anti-interference satellite navigation equipment detecting system of big dipper |
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