CN103868669A - Underwater multipoint excitation pseudo-dynamic testing system - Google Patents
Underwater multipoint excitation pseudo-dynamic testing system Download PDFInfo
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Abstract
The invention discloses an underwater multipoint excitation pseudo-dynamic testing system. The system is characterized in that the system is provided with a transparent water tank, the water tank is supported by a support and filled with water, and a bottom plate of the water tank is of a plane structure; a submerged floating tunnel model floating in the water is arranged in the water tank; a plurality of excitation mechanisms are horizontally arranged below the submerged floating tunnel model and are connected with the submerged floating tunnel model through anchor cables; the excitation mechanisms are longitudinally arranged at intervals and are connected with excitation points of the submerged floating tunnel model through the anchor cables in a one-to-one correspondence mode to form a multipoint excitation mechanism; the system is further provided with a driving mechanism which is used for driving the excitation mechanisms to carry out straight reciprocating motion in the transverse direction, the longitudinal direction and the vertical direction, wherein the longitudinal direction is parallel to the axis of the submerged floating tunnel model. The system can meet requirements for sizes of large-sized structural models, represent seismic oscillation and structural responses and provide a powerful means for studying underwater fine-structure seismic response mechanisms and aseismic design.
Description
Technical field
The present invention relates to a kind of dynamic experiment system of intending, more particularly relate to the pilot system of the long fine texture of a kind of underwater simulation in Structures under Earthquake dynamic response.
Background technology
In the last few years, the recovery activity of ocean resources was day by day frequent, and the quantity of submarine oil-transportation, feed channel increases with surprising rapidity, and the construction of sea-bottom oil-gas pipeline is flourish.People are also extended to field of traffic by the utilization to Yu Haiyang simultaneously, and in water, the research of submerged floating tunnel starts to step into people's the visual field.
Compared with crossing over other modes of transportation of rivers,lakes and seas, in water, submerged floating tunnel has its exclusive advantage, for example, during operation, do not affect water route shipping; Can protect original waters natural views; Be not subject to the impact of weather extremes, ensure that traffic is round-the-clock normal current etc.But off-lying sea earthquake is frequent, the frequent generation of tsunami all over the world, had brought great disaster to the mankind especially in the last few years, had also caused gradually concern and the research of people to oceanic earthquake power.The earthquake caused earth's crust in off-lying sea changes for being embedded in sea bed following or be exposed to the pipeline on sea bed surface, and potential danger is very large.Therefore, for oceanographic engineering, construction has very important significance in the research dynamic response of long fine texture under geological process under water.
Due to complicacy and the theoretical limitation of earthquake mechanism and structural seismic performance, only analyze and can't disclose course of reaction and the failure mechanism of structure under geological process completely theoretically, particularly to large and complex structure, exceed structure and new structure system that earthquake resistant design code specifies, before enforcement, must carry out seismic testing research.Land earthquake simulation test equipment development is relatively ripe both at home and abroad at present, existing simulated earthquake platform, simulated earthquake room etc., multiple spot earthquake input adopts consistent energisation mode, in physical construction, realizing horizontal direction sieves, vertical direction lifting and vibrations, with simulated earthquake shear wave, compressional wave and vibrating effect, cost reaches several ten million.And normally adopt theoretical method research for the dynamic response of long fine texture under geological process under water, although the Construction of University of existing only a few has shaking table under water at present, but can only realize synchronous consistent earthquake input, can not realize the input of multiple spot multi-dimensional earthquake, while is due to the restriction of table top physical dimension and incentive functions, also can only carry out the shorter model structure experiment of reduced scale, and involve great expense.
In water, long fine texture span is large, and between anchor point, distance is relatively large, and earthquake input presents the feature of multiple spot multidimensional.The multiple spot earthquake of consideration steric effect is inputted different anchor cables place seismic event and is presented phase difference, and long fine texture span space is larger, and shaking table experimental simulation difficulty is very large, at present the domestic testing equipment that can realize this function that there is not yet.
Summary of the invention
The present invention is for avoiding the existing weak point of above-mentioned prior art, one excitation pseudo system is under water provided, can meet the requirement of large scale structure moulded dimension aspect, can reproduce again earthquake motion and structural response, for research under water machine-processed the and seismic design of long fine texture earthquake response strong means are provided.
The present invention is that technical solution problem adopts following technical scheme:
The present invention under water design feature of excitation pseudo system is: the transparent water tank that fills water body by bearing support is set, and water tank bottom plate is planar structure; Suspension tunnel model in the water being suspended in water body is set in water tank; In described water suspension tunnel model below be and be horizontally disposed with excitation mechanism, and connect suspension tunnel model in described excitation mechanism and water with anchor cable; Many group excitation mechanisms longitudinally arrange at interval, anchor cable corresponding being connected one by one between each group of excitation mechanism and each point of excitation in suspension tunnel model in water, formation excitation mechanism; Driving mechanism is set, for driving described excitation mechanism in the straight reciprocating motion laterally, longitudinally and in vertical side; Describedly longitudinally refer to the direction parallel with the axis of suspension tunnel model in described water.
The present invention under water design feature of excitation pseudo system is also:
Described excitation mechanism is three layers of excitation plate, be respectively in bottom with spring-supported lower excitation plate, be supported on the middle excitation plate on lower excitation plate end face with the longitudinal slide rail and the longitudinal sliding block that are equipped with, and be supported on the upper excitation plate on middle excitation plate end face with the horizontal slide rail and the transverse slider that are equipped with; Described anchor cable is located by connecting in excitation plate; Described driving mechanism independently arranges each actuator corresponding to three layers of excitation plate, respectively horizontal actuator for driving the horizontal straight reciprocating motion of upper excitation plate, for driving longitudinal actuator of the longitudinal straight reciprocating motion of excitation plate, and for driving the vertical reciprocating vertical actuator of lower excitation plate.
On water tank bottom plate, offer window, upper excitation plate is placed in the window of described water tank bottom plate, and the periphery of described upper excitation plate is connected by the sealing of flexible polymer web member with the periphery of window; Described flexible polymer web member is set to waveform, so that upper excitation plate has horizontal, longitudinal and vertical straight reciprocating motion allowance on the window's position; Described middle excitation plate and lower excitation plate, and each actuator is all in water tank outside.
The present invention under water design feature of excitation pseudo system is also:
The cross-sectional configuration of described longitudinal slide rail is: "T"-shaped slide rail is to inside turn with rectangular edges in symmetria bilateralis; Described longitudinal sliding block forms intussusception with corresponding shape and longitudinal slide rail;
The cross-sectional configuration of described horizontal slide rail is: "T"-shaped slide rail is to inside turn with rectangular edges in symmetria bilateralis; Described transverse slider forms intussusception to form accordingly with horizontal slide rail.
Further:
Described excitation mechanism has four groups, be followed successively by from left to right the first excitation mechanism, the second excitation mechanism, the 3rd excitation mechanism and the 4th excitation mechanism, longitudinal actuator of described the first excitation mechanism, the second excitation mechanism is positioned at water tank left end, and longitudinal actuator of described the 3rd excitation mechanism and the 4th excitation mechanism is positioned at water tank right-hand member;
The lower excitation plate interlock by straight-bar and described the 4th excitation mechanism for driving the 4th longitudinal actuator of the 4th excitation mechanism;
For driving a pair of the 3rd longitudinal actuator that longitudinal actuator of the 3rd excitation mechanism is synchronization action, " Y " shape drive link is set, the straight-bar end of described " Y " shape drive link is connected with the lower excitation plate of described the 3rd excitation mechanism, and " V " shape rod end of " Y " shape drive link is connected with described a pair of the 3rd longitudinal actuator respectively.
Further:
Position limiting structure is set, and is to be fixedly installed a bowl-shape cover at the sidepiece of upper excitation plate, in the internal cavities of bowl-shape cover, places sliding panel, in the biside plate plane of sliding panel, be respectively array setting can feel relieved roll steel ball; The drive link being connected with horizontal actuator is fixedly connected in the outer panel plane of sliding panel; Bowl-shape cover is butted on sliding panel the sidepiece of excitation plate on the action direction along horizontal actuator, avoids sliding panel on the force direction along horizontal actuator, to form the play between upper excitation plate; The sliding panel that is arranged in bowl-shape cover can translation arbitrarily in the plane perpendicular to the horizontal force direction of actuator; On the cover plate of bowl-shape cover, offer the lid hole of enough sizes, the drive link being connected with horizontal actuator runs through and covers hole, and lid hole had both met the translation of sliding panel in bowl-shape cover, can ensure that again sliding panel and upper excitation plate do not depart from.
Compared with the prior art, beneficial effect of the present invention is embodied in:
1, the present invention can meet the requirement of large scale structure moulded dimension aspect, can reproduce again earthquake motion and structural response, for research under water machine-processed the and seismic design of long fine texture earthquake response strong means are provided.
2, the present invention can be used for realizing the seismic model experiment of multiple spot difference input under water, under given seismologic parameter, realizes synchronous or asynchronous displacement and loads, thereby simulate the dynamic response of the submerged structure being positioned on excitation mechanism under ground seismic wave function.
3, the present invention is by arranging orthoscopic electro-hydraulic servo actuator, each actuator can be controlled separately by single-chip microcomputer, can realize synchronous or asynchronous load and displacement, not only can simulate the dynamic response of the submerged structure being fixed in excitation plate under ground seismic wave function, and greatly save experimentation cost.
4, system of the present invention can be as required to each independently set-up of control system control parameter under a computer control, thereby completes given wave-form test.
Brief description of the drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is stream line location structure schematic diagram of the present invention;
Fig. 3 goes up syndeton schematic diagram between excitation plate and water tank bottom plate in the present invention;
Fig. 4 is excitation mechanism front view in the present invention;
Fig. 5 is excitation mechanism side view in the present invention;
Fig. 6 a is the longitudinal actuator drive link of the present invention schematic diagram;
Fig. 6 b is another form schematic diagram of the longitudinal actuator drive link of the present invention;
Fig. 7 is the rolling support position limiting structure schematic diagram arranging for excitation plate in the present invention;
Number in the figure: 1 bearing, 2 water tanks, 3 suspension tunnel model, 4 pipeline section web members, 5 wave absorption filter screens, 6 anchor cables, 7 flexible polymer web members, 8 sealing joint strips, 9 excitation mechanisms, 10a " Y " shape drive link, 10b straight-bar, 11 horizontal actuator, 12 vertical actuator, 13 longitudinal actuator, the longitudinal actuator of 13a the 3rd, the longitudinal actuator of 13b the 4th, 14 connecting rods, 15 water tank bottom plates, 16a longitudinal sliding block, the longitudinal slide rail of 16b, 16c transverse slider, the horizontal slide rail of 16d, 17 springs, 18 bowl-shape covers, 19 sliding panels, 20 steel balls.
Embodiment
In the present embodiment, excitation pseudo system is for suspension tunnel model in water 3 under water, also can be applicable to the suspension tunnel model being formed by single or multiple pipeline, suspension tunnel model 3 adopts PVC circular pipe, add lead ring by the requirement suspending and carry out counterweight, the water surface in process of the test in water tank should be higher than the top of suspension tunnel model 3.
Referring to Fig. 1, Fig. 2, the transparent water tank 2 that fills water body is set in the present embodiment, water tank bottom plate 15 is planar structure, and is supported by bearing 1; Suspension tunnel model 3 in the water being suspended in water body is set in water tank 2; In water suspension tunnel model 3 below be and be horizontally disposed with excitation mechanism 9, and connect suspension tunnel model 3 in excitation mechanism 9 and water with anchor cable 6; Many group excitation mechanisms 9 longitudinally arrange at interval, anchor cable 6 corresponding being connected one by one between each group of excitation mechanism 9 and each point of excitation in suspension tunnel model in water 3, formation excitation mechanism; Driving mechanism is set, for driving excitation mechanism 9 in the straight reciprocating motion laterally, longitudinally and in vertical side; Longitudinally refer to the direction parallel with the axis of suspension tunnel model in water 3.
In water shown in Fig. 1, suspension tunnel model 3 is to connect mutually and form symmetrical structure with pipeline section web member 4 at middle part with right segment model with left segment model; Excitation mechanism is symmetrical distribution corresponding to left segment model and right segment model; At the water surface site of Experimental Water Tank, be positioned at the each periphery of water tank wave absorption filter screen 5 is installed, the bottom of wave absorption filter screen 5 tilts towards water tank inner side, wave absorption filter screen 5 is Multilayer Network grid, the net grid of each layer of net grid is ascending from nexine to skin, while experiment for being absorbed in, vibrate because dynamic action causes the water surface wave producing, in Fig. 1, only provided the signal of wave absorption filter screen 5 for ease of expression in the left side of water tank.
Referring to Fig. 4, Fig. 5 and Fig. 6, in the present embodiment, excitation mechanism 9 is three layers of excitation plate, be respectively the lower excitation plate 9c that supports with spring 17 in bottom, be supported on the middle excitation plate 9b on lower excitation plate 9c end face with the longitudinal slide rail 16b and the longitudinal sliding block 16a that are equipped with, and be supported on the upper excitation plate 9a on middle excitation plate 9b end face with the horizontal slide rail 16d and the transverse slider 16c that are equipped with; Anchor cable 6 is located by connecting on excitation plate 9a.As shown in Figure 3, on upper excitation plate 9a, interval arranges a series of connecting rods 14, on each connecting rod 14, tie point is set respectively, anchor cable 6 can be chosen on the tie point of diverse location and be located by connecting, change the traction angle of anchor cable by changing the fixed position of anchor cable, realize the experimental study under different anchor cable arrangement forms.
As shown in Figure 1, driving mechanism independently arranges each actuator corresponding to three layers of excitation plate, respectively horizontal actuator 11 for driving the horizontal straight reciprocating motion of upper excitation plate 9a, for driving longitudinal actuator 13 of the longitudinal straight reciprocating motion of excitation plate 9b, and for driving the vertical reciprocating vertical actuator 12 of lower excitation plate 9c.
Shown in Fig. 1, Fig. 3, in the present embodiment, on water tank bottom plate 15, offer window, upper excitation plate 9a is placed in the window of water tank bottom plate 15, and the periphery of upper excitation plate 9a and the periphery of window are tightly connected by sealing joint strip 8 by flexible polymer web member 7; Flexible polymer web member 7 is set to waveform as shown in Figure 3, so that upper excitation plate 9a has horizontal, longitudinal and vertical straight reciprocating motion allowance on the window's position; Middle excitation plate 9b and lower excitation plate 9c, and each actuator is all in water tank outside, support water tank 2 on suitable height by bearing 1, with excitation plate 9b in ensureing and lower excitation plate 9c, and the installation of each actuator and operating position.
The cross-sectional configuration of longitudinal slide rail 16b shown in Fig. 5 is: "T"-shaped slide rail is to inside turn with rectangular edges in symmetria bilateralis; Longitudinal sliding block 16a forms intussusception with corresponding shape with longitudinal slide rail 16b; The cross-sectional configuration of horizontal slide rail 16d shown in Fig. 4 is: "T"-shaped slide rail is to inside turn with rectangular edges in symmetria bilateralis; Transverse slider 16c forms intussusception to form accordingly with horizontal slide rail 16d.Such version makes each layer of excitation plate accurately lead, be free to slide in the direction of the slide rail along separately, each in different directions actuator is done the used time simultaneously, accurately realize by excitation plate in lower excitation plate drive and then drive the above multi-dimensional movement of excitation plate, avoiding influencing each other between variant direction.
In the present embodiment, excitation mechanism 9 has four groups, be followed successively by from left to right the first excitation mechanism, the second excitation mechanism, the 3rd excitation mechanism and the 4th excitation mechanism, longitudinal actuator of the first excitation mechanism, the second excitation mechanism is positioned at water tank left end, and longitudinal actuator of the 3rd excitation mechanism and the 4th excitation mechanism is positioned at water tank right-hand member;
For driving the 4th longitudinal actuator 13b of the 4th excitation mechanism to realize interlock by the lower excitation plate of the straight-bar 10b shown in Fig. 6 a and the 4th excitation mechanism;
For driving a pair of the 3rd longitudinal actuator 13a that longitudinal actuator of the 3rd excitation mechanism is synchronization action, " Y " shape drive link 10a is as shown in Figure 6 b set, the straight-bar end of " Y " shape drive link 10a is connected with the lower excitation plate of the 3rd excitation mechanism, and " V " shape rod end of " Y " shape drive link 10a is threaded with a pair of the 3rd longitudinal actuator 13a respectively; This structure is arranged so that a pair of the 3rd longitudinal actuator 13a and the 4th longitudinal actuator 13b can arrange at grade, and avoids forming each other interference.
In concrete enforcement, as shown in Figure 7, above excitation plate 9a is example, in order to make upper excitation plate 9a in the vertical reciprocating excitation of acquisition and in the time obtaining longitudinal reciprocating excitation, coupled horizontal actuator 11 is not servo-actuated in vertical and longitudinal formation, one position limiting structure can be set, to be fixedly installed a bowl-shape cover 18 at the sidepiece of upper excitation plate 9a, in the internal cavities of bowl-shape cover 18, place sliding panel 19, in the biside plate plane of sliding panel 19, be respectively array setting can feel relieved roll steel ball 20; The drive link being connected with horizontal actuator 11 is fixedly connected in the outer panel plane of sliding panel 19; Bowl-shape cover 18 is butted on sliding panel 19 sidepiece of excitation plate on the action direction along horizontal actuator 11, avoids sliding panel 19 on the force direction along horizontal actuator 11, to form the play between upper excitation plate 9a; The sliding panel 19 that is arranged in bowl-shape cover 18 can translation arbitrarily in the plane perpendicular to the horizontal force direction of actuator 11; On the cover plate of bowl-shape cover 18, offer the lid hole of enough sizes, the drive link being connected with horizontal actuator 11 runs through and covers hole, and lid hole should meet the translation of sliding panel in bowl-shape cover, can ensure that again sliding panel and upper excitation plate do not depart from.Moreover, middle excitation plate 9b is identical with structure shown in Fig. 7 in a side at longitudinal actuator 13 places.
In concrete enforcement, the input of power signal can be realized by MTS Material Testing Machine, employing power-displacement control mode, realizing power by electro-hydraulic servo actuator loads, actuator or by drive link or act directly in corresponding excitation plate, each actuator is independently controlled, and can realize synchronous or asynchronous load and displacement, and then realizes the submerged structure being fixed in excitation plate and test along the multiple spot multi-dimensional vibration of one or more directions.
The present embodiment is taking submerged floating tunnel in water as model, and corresponding structure setting can be also for the various long fine textures under water with in oil, natural gas extraction.
Claims (6)
1. an excitation pseudo system under water, is characterized in that: the transparent water tank that fills water body (2) by bearing (1) supporting is set, and water tank bottom plate (15) is planar structure; Suspension tunnel model (3) in the water being suspended in water body is set in water tank (2); The below of suspension tunnel model in described water (3) is and is horizontally disposed with excitation mechanism (9), and connects suspension tunnel model (3) in described excitation mechanism (9) and water with anchor cable (6); Many group excitation mechanisms (9) longitudinally interval arrange, anchor cable (6) corresponding being connected one by one between the upper each point of excitation of each group of excitation mechanism (9) and suspension tunnel model in water (3), formation excitation mechanism; Driving mechanism is set, for driving described excitation mechanism (9) in the straight reciprocating motion laterally, longitudinally and in vertical side; Describedly longitudinally refer to the direction parallel with the axis of suspension tunnel model (3) in described water.
2. the pseudo of excitation under water system according to claim 1, it is characterized in that: described excitation mechanism (9) is three layers of excitation plate, be respectively the lower excitation plate (9c) that supports with spring (17) in bottom, be supported on the middle excitation plate (9b) on lower excitation plate (9c) end face with the longitudinal slide rail (16b) and the longitudinal sliding block (16a) that are equipped with, and be supported on the upper excitation plate (9a) on middle excitation plate (9b) end face with the horizontal slide rail (16d) and the transverse slider (16c) that are equipped with; Described anchor cable (6) is located by connecting in excitation plate (9a); Described driving mechanism independently arranges each actuator corresponding to three layers of excitation plate, be respectively for drive upper excitation plate (9a) laterally straight reciprocating motion horizontal actuator (11), for driving longitudinally longitudinal actuator (13) of straight reciprocating motion of excitation plate (9b), and for driving the vertical reciprocating vertical actuator (12) of lower excitation plate (9c).
3. the pseudo of excitation under water system according to claim 2, it is characterized in that: on water tank bottom plate (15), offer window, upper excitation plate (9a) is placed in the window of described water tank bottom plate (15), and the periphery of described upper excitation plate (9a) is connected by flexible polymer web member (7) sealing with the periphery of window; Described flexible polymer web member (7) is set to waveform, so that upper excitation plate (9a) has horizontal, longitudinal and vertical straight reciprocating motion allowance on the window's position; Described middle excitation plate (9b) and lower excitation plate (9c), and each actuator is all in water tank outside.
4. the pseudo of excitation under water system according to claim 2, is characterized in that:
The cross-sectional configuration of described longitudinal slide rail (16b) is: "T"-shaped slide rail is to inside turn with rectangular edges in symmetria bilateralis; Described longitudinal sliding block (16a) forms intussusception with corresponding shape and longitudinal slide rail (16b);
The cross-sectional configuration of described horizontal slide rail (16d) is: "T"-shaped slide rail is to inside turn with rectangular edges in symmetria bilateralis; Described transverse slider (16c) forms intussusception to form accordingly with horizontal slide rail (16d).
5. the pseudo of excitation under water system according to claim 2, is characterized in that:
Described excitation mechanism (9) has four groups, be followed successively by from left to right the first excitation mechanism, the second excitation mechanism, the 3rd excitation mechanism and the 4th excitation mechanism, longitudinal actuator of described the first excitation mechanism, the second excitation mechanism is positioned at water tank left end, and longitudinal actuator of described the 3rd excitation mechanism and the 4th excitation mechanism is positioned at water tank right-hand member;
The lower excitation plate interlock with described the 4th excitation mechanism by straight-bar (10b) for driving the 4th longitudinal actuator (13b) of the 4th excitation mechanism;
For driving a pair of the 3rd longitudinal actuator (13a) that longitudinal actuator of the 3rd excitation mechanism is synchronization action, " Y " shape drive link (10a) is set, the straight-bar end of described " Y " shape drive link (10a) is connected with the lower excitation plate of described the 3rd excitation mechanism, and " V " shape rod end of " Y " shape drive link (10a) is connected with described a pair of the 3rd longitudinal actuator (13a) respectively.
6. the pseudo of excitation under water system according to claim 2, it is characterized in that: position limiting structure is set, to be fixedly installed a bowl-shape cover (18) at the sidepiece of upper excitation plate (9a), in the internal cavities of bowl-shape cover (18), place sliding panel (19), in the biside plate plane of sliding panel (19), be respectively array setting can feel relieved roll steel ball (20); The drive link being connected with horizontal actuator (11) is fixedly connected in the outer panel plane of sliding panel (19); Bowl-shape cover (18) is butted on sliding panel (19) sidepiece of upper excitation plate on the action direction along horizontal actuator (11), avoids sliding panel (19) on the force direction along horizontal actuator (11), to form the play between upper excitation plate (9a); The sliding panel (19) that is arranged in bowl-shape cover (18) can translation arbitrarily in the plane perpendicular to the horizontal force direction of actuator (11); On the cover plate of bowl-shape cover (18), offer the lid hole of enough sizes, the drive link being connected with horizontal actuator (11) runs through and covers hole, lid hole had both met the translation of sliding panel in bowl-shape cover, can ensure that again sliding panel and upper excitation plate do not depart from.
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Cited By (9)
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| CN106430086A (en) * | 2016-09-30 | 2017-02-22 | 渤海大学 | Focused shock excitation device capable of exciting MEMS microstructure in water |
| GB2567314A (en) * | 2017-09-15 | 2019-04-10 | Thornton Tomasetti Defence Ltd | Shock testing apparatus and method |
| CN110174227A (en) * | 2019-06-26 | 2019-08-27 | 广西大学 | Submerged floating tunnel bridge response to forced vibration device and method under earthquake and coupling wave with current |
| CN110595713A (en) * | 2019-09-27 | 2019-12-20 | 天津大学 | Suspension type tunnel earthquake and flow induced vibration composite test simulation device |
| CN110702350A (en) * | 2019-11-19 | 2020-01-17 | 中国交通建设股份有限公司 | Test device and test method for exciting integral vibration of suspension tunnel model |
| CN110715786A (en) * | 2019-11-19 | 2020-01-21 | 中国交通建设股份有限公司 | Underwater impact test device and method for underwater suspension pipe body |
| CN110823492A (en) * | 2019-11-19 | 2020-02-21 | 中国交通建设股份有限公司 | Test device and test method for suspension tube excitation test |
| CN113049203A (en) * | 2021-03-03 | 2021-06-29 | 盐城市房屋安全鉴定中心 | System and method for testing out-of-plane anti-seismic performance of masonry wall |
| CN113295356A (en) * | 2021-04-27 | 2021-08-24 | 广西大学 | Dynamic response test model and method for suspended tunnel under combined action of earthquake and wave current |
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