CN109033491A - Seismic fortification method is built in a kind of construction based on ground fissure place earthquake enlarge-effect - Google Patents
Seismic fortification method is built in a kind of construction based on ground fissure place earthquake enlarge-effect Download PDFInfo
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- CN109033491A CN109033491A CN201810551665.XA CN201810551665A CN109033491A CN 109033491 A CN109033491 A CN 109033491A CN 201810551665 A CN201810551665 A CN 201810551665A CN 109033491 A CN109033491 A CN 109033491A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
Abstract
The present invention discloses a kind of construction based on ground fissure place earthquake enlarge-effect and builds seismic fortification method, by obtaining corresponding with measuring point Response Spectrum fitting curve, and by Response Spectrum fitting curve and target place earthquake ground motion acceleration time-history curves determine earthquake motion coverage η, in ground fissure disk earthquake motion and earth pulsation amplification factor than curve AOnWith the earthquake motion of ground fissure lower wall and earth pulsation amplification factor than curve AUnderTreat the building set up defences on place build set up defences when, according to structure building foundation away between ground fissure place distance L and earthquake motion coverage η relationship, basis away from relationship, the earthquake motion of ground fissure upper lower burrs and the earth pulsation amplification factor between ground fissure than curve AOnOr AUnder, seismic design provision in building code regulation and Response Spectrum fitting curve just can determine the seismic acceleration value at structure building foundation, achieve the purpose that set up defences.
Description
Technical field
The invention belongs to technical field of providing fortification against earthquakes, in particular to a kind of building based on ground fissure place earthquake enlarge-effect
Construct seismic fortification method.
Background technique
Existing place ground fissure specification gives the minimum evaded distance of this area ground fissure place building, this side
Formula empirical is serious and can not build evaded distance and ground fissure field to the place construction of other regional ground fissures in addition to the ground
Earthquake enlarge-effect is accurately and effectively analyzed in ground, if carrying out ground fissure place according to original method constructs the antidetonation built
It sets up defences, can not accurately determine reasonable evaded distance in the area in addition to the ground, and can not accurately be given at
Earthquake enlarge-effect (seismic acceleration) in ground fissure place is not inconsistent new era design and construction requirement.It is therefore desirable to grind
Study carefully a kind of construction based on ground fissure place earthquake enlarge-effect and build the method provided fortification against earthquakes, is wanted with adapting to setting up defences for different regions
It asks.
Summary of the invention
To solve problems of the prior art, the object of the present invention is to provide one kind is put based on the earthquake of ground fissure place
Seismic fortification method is built in the construction of big effect, and the present invention is a kind of place ground fissure evaded distance and determining ground fissure coverage
The method of interior design seismic acceleration value, can be accurate and efficient determines under the ground fissure place of somewhere that building built keeps away
It allows distance, while can provide revised basic seismic design to having to build in the building of ground fissure field construction and accelerate
Degree, is able to solve problems of the prior art.
The technical solution adopted by the invention is as follows:
Seismic fortification method is built in a kind of construction based on ground fissure place earthquake enlarge-effect, comprising the following steps:
Step 1, the ground fissure for determining target place is laid multiple vertical with ground fissure respectively in the upper lower burrs of ground fissure
Measuring point carries out earth pulsation in-situ test at measuring point, obtains target place earth pulsation acceleration-time curve；
Step 2, target place earth pulsation acceleration-time curve is analyzed, obtains the peak of response spectrum of each measuring point,
And draw using the peak of response spectrum of each measuring point as ordinate, using away from ground fissure distance as the Response Spectrum fitting curve of abscissa；
Step 3, each measuring point response spectrum amplification factor S of disk in ground fissure is determined according to Response Spectrum fitting curvei, under ground fissure
Each measuring point response spectrum amplification factor X of diskiAnd response spectrum coverage l, wherein in ground fissure the amplification of each measuring point response spectrum of disk because
Sub- SiFor the ratio of each measuring point peak of response spectrum and the steady peak value of peak of response spectrum of disk in ground fissure, each measuring point of ground fissure lower wall is anti-
Amplification factor X should be composediFor the ratio of ground fissure lower wall each measuring point peak of response spectrum and the steady peak value of peak of response spectrum, response spectrum shadow
Ringing range l is abscissa corresponding when Response Spectrum fitting curve just starts to tend to be steady；
Step 4, with each measuring point response spectrum amplification factor S of disk in ground fissureiIt is put as each measuring point earth pulsation of disk in ground fissure
Big factor-alphaUpper i；With each measuring point response spectrum amplification factor X of ground fissure lower walliAs each measuring point earth pulsation amplification factor of ground fissure lower wall
αLower i；Using response spectrum coverage l as earth pulsation coverage β；
Step 5, target place earthquake ground motion acceleration time-history curves are obtained, according to target place earthquake ground motion acceleration time-histories song
Line determines each measuring point earthquake motion amplification factor γ of disk in ground fissureUpper i, each measuring point earthquake motion amplification factor γ of ground fissure lower wallLower iWith
Earthquake motion coverage η, wherein each measuring point earthquake motion amplification factor γ of disk in ground fissureUpper iFor target place earthquake ground motion acceleration
On time-history curves in ground fissure the steady acceleration of each measuring point seismic acceleration of disk and acceleration-time curve ratio, ground fissure
Each measuring point earthquake motion amplification factor γ of lower wallLower iFor each measuring point of ground fissure lower wall on the earthquake ground motion acceleration time-history curves of target place
The ratio of the steady acceleration of seismic acceleration and acceleration-time curve, earthquake motion coverage η are target land seismic dynamic
Acceleration-time curve just starts abscissa corresponding to the measuring point to tend to be steady；Wherein, steady acceleration is for target place
Oscillatory acceleration time-history curves ordinate mean value corresponding to each measuring point after tending to be steady；
Step 6, according to each measuring point earth pulsation amplification factor α of upper disk in target placeUpper i, lower wall each measuring point earth pulsation amplification
Factor-alphaLower i, earth pulsation coverage β, disk earthquake motion amplification factor γ in ground fissureUpper i, ground fissure lower wall earthquake motion amplification factor
γLower iDisk earthquake motion and earth pulsation amplification factor ratio in each measuring point ground fissure in target place are determined with earthquake motion coverage η
aUpper i, each measuring point earthquake motion of ground fissure lower wall and earth pulsation amplification factor ratio aLower iIt is influenced with ground fissure land seismic dynamic and earth pulsation
Range ratio b, and according to all aUpper iWith all aLower iDisk earthquake motion and earth pulsation amplification factor ratio in ground fissure are fitted respectively
Curve AOnWith the earthquake motion of ground fissure lower wall and earth pulsation amplification factor than curve AUnder, disk earthquake motion and earth pulsation amplify in ground fissure
The factor is than curve AOnIn, using away from ground fissure distance as abscissa, with disk earthquake motion in ground fissure and earth pulsation amplification factor ratio aOn
For ordinate；The earthquake motion of ground fissure lower wall and earth pulsation amplification factor are than curve AUnderIn, using away from ground fissure distance as abscissa, with
The earthquake motion of ground fissure lower wall and earth pulsation amplification factor ratio aUnderFor ordinate；
Wherein, aUpper i=γUpper i/αUpper i, aLower i=γLower i/αLower i, b=η/β；
Step 7, the building wait set up defences on place identical with target Geological condition is built and is set up defences, process
Are as follows:
Structure building foundation is determined away from ground fissure place distance L, if L >=η, building, which is built, to be set in design according to building aseismicity
Count the regulation basic seismic design acceleration value of specification；
If L < η, and the disk in ground fissure is built in building, then according between structure building foundation and target place ground fissure away from
The corresponding upper disk earth pulsation amplification factor in structure building foundation position is determined from Response Spectrum fitting curve；It is built further according to building
The corresponding upper disk earth pulsation amplification factor in basic position disk earthquake motion and earth pulsation amplification factor in ground fissure compare curve
AOnDisk earthquake motion amplification factor in the corresponding ground fissure of upper determining structure building foundation；Then building, which is built, sets in design in building aseismicity
Amplify on the basis of basic earthquake acceleration value as defined in meter specification multiplied by disk earthquake motion in the corresponding ground fissure of structure building foundation
The factor；
If L < η, and building is built in ground fissure lower wall, then according between structure building foundation and target place ground fissure away from
The corresponding lower wall earth pulsation amplification factor in structure building foundation position is determined from Response Spectrum fitting curve；It is built further according to building
The corresponding lower wall earth pulsation amplification factor in basic position compares curve in the earthquake motion of ground fissure lower wall and earth pulsation amplification factor
AUnderThe corresponding ground fissure lower wall earthquake motion amplification factor of upper determining structure building foundation；Then building, which is built, sets in design in building aseismicity
Amplify on the basis of basic earthquake acceleration value as defined in meter specification multiplied by the corresponding ground fissure lower wall earthquake motion of structure building foundation
The factor.
In step 1, measuring point is symmetrically laid in the upper lower burrs of ground fissure, the concentration of measuring point is with away from ground fissure distance
Increase and constantly reduces.
The steady peak value of peak of response spectrum is peak of response spectrum corresponding to each measuring point after Response Spectrum fitting curve tends to be steady
Mean value.
In step 5, when obtaining target place earthquake ground motion acceleration time-history curves, if doing load ground around ground fissure place
The numerical simulation of seismic wave, and obtain earthquake ground motion acceleration time-history curves, then it is determined in ground fissure according to the acceleration-time curve
Each measuring point earthquake motion amplification factor γ of diskUpper i, each measuring point earthquake motion amplification factor γ of ground fissure lower wallLower iWith earthquake motion coverage
η；
If the numerical simulation of load seismic wave was not done around ground fissure place, to carrying out load earthquake around ground fissure
The numerical simulation of wave, in step 1 on the basis of the measuring point of progress earth pulsation in-situ test, also in the symmetrical cloth of ground fissure upper lower burrs
If extending measuring point, and fit target place earthquake ground motion acceleration time-history curves.
Compared with prior art, the invention has the following advantages:
The present invention passes through Response Spectrum fitting curve and target field by obtaining Response Spectrum fitting curve corresponding with measuring point
Ground earthquake ground motion acceleration time-history curves determine earthquake motion coverage η, disk earthquake motion and earth pulsation amplification factor in ground fissure
Than curve AOnWith the earthquake motion of ground fissure lower wall and earth pulsation amplification factor than curve AUnder, identical as target place for geological conditions
Place to be set up defences, treat the building set up defences on place build set up defences when, according to structure building foundation away from ground fissure place away from
From the relationship between relationship, structure building foundation and the ground fissure between L and earthquake motion coverage η, disk earthquake motion in ground fissure
With earth pulsation amplification factor than curve AOnOr the earthquake motion of ground fissure lower wall and earth pulsation amplification factor are than curve AUnder, building aseismicity sets
The regulation and Response Spectrum fitting curve for counting specification just can determine the seismic acceleration value at structure building foundation, reach the mesh set up defences
, the present invention can it is accurate and it is efficient determine to construct the evaded distance built under the ground fissure place of somewhere, simultaneously for
That, which has to build in the building of ground fissure field construction, provides revised basic seismic design acceleration, solves existing skill
The problem of art.
Detailed description of the invention
Fig. 1 is that the present invention is based on the flow charts that fortification against earthquakes is built in the construction of ground fissure place earthquake enlarge-effect；
Fig. 2 is the peak of response spectrum curve and the relation schematic diagram away from ground fissure distance that the present invention fits；
Fig. 3 is response spectrum amplification factor curve of the present invention；
Fig. 4 is that earthquake motion measuring point of the present invention lays curve；
Fig. 5 is earthquake motion amplification factor curve of the present invention；
Fig. 6 is that disk earthquake motion and earth pulsation amplification factor compare curve in ground fissure of the present invention；
Fig. 7 is that ground fissure lower wall earthquake motion of the present invention and earth pulsation amplification factor compare curve.
Specific embodiment
It is next with reference to the accompanying drawings and examples that the present invention is further illustrated.
Referring to Fig.1, the construction of the invention based on ground fissure place earthquake enlarge-effect build seismic fortification method by with
Lower step is realized:
Step (1), it is first determined measuring point is symmetrically laid in the upper lower burrs of ground fissure in the ground fissure place for going out target place,
And earth pulsation tester is utilized, earth pulsation in-situ test is carried out at measuring point, and it is bent to obtain target place earth pulsation Acceleration time course
Line；
Wherein, measuring point quantity is suitably increased and decreased according to different regions geological environment, and the concentration of measuring point is with measuring point
Increase away from ground fissure distance and constantly reduce.It is more than the local measuring point quantity being closer away from ground fissure and close, away from ground fissure
It is few and thin apart from farther away local measuring point quantity；
Step (2), the target place earth pulsation acceleration-time curve obtained to step 1 are analyzed, and each measuring point is obtained
Peak of response spectrum, and draw respectively using the peak of response spectrum of each measuring point as ordinate, using away from ground fissure distance as the anti-of abscissa
Matched curve (as shown in Figure 2) should be composed；
Step (3) determines each measuring point response spectrum amplification factor S of disk in ground fissure according to Response Spectrum fitting curvei, ground fissure
Each measuring point response spectrum amplification factor X of lower walliAnd response spectrum coverage l (referring to Fig. 3), wherein each measuring point of disk in ground fissure
Response spectrum amplification factor SiFor the ratio of each measuring point peak of response spectrum and the steady peak value of peak of response spectrum of disk in ground fissure, ground fissure
Each measuring point response spectrum amplification factor X of lower walliFor each measuring point peak of response spectrum of ground fissure lower wall and the steady peak value of peak of response spectrum
Ratio, response spectrum coverage l are abscissa corresponding when Response Spectrum fitting curve just starts to tend to be steady；Above and below ground fissure
The response spectrum coverage of two disks is approximately uniform, wherein i is that the number of different measuring points, i are followed successively by from the near to the remote from ground fissure
1,2,3,4 ... ...；The steady peak value of peak of response spectrum is response spectrum corresponding to each measuring point after Response Spectrum fitting curve tends to be steady
The mean value of peak value；
Step (4), with each measuring point response spectrum amplification factor S of disk in ground fissureiAs each measuring point earth pulsation of disk in ground fissure
Amplification factor αUpper i；With each measuring point response spectrum amplification factor X of ground fissure lower walliAs the amplification of each measuring point earth pulsation of ground fissure lower wall because
Sub- αLower i；Using response spectrum coverage l as earth pulsation coverage β；
Step (5), judgement take either with or without the numerical simulation for doing load seismic wave around the ground fissure of target place, if ground cleave
Seam place around do not did load seismic wave numerical simulation, then to carried out around ground fissure load seismic wave numerical simulation,
On the basis of the measuring point for carrying out earth pulsation in-situ test in step 1, is also symmetrically laid in ground fissure upper lower burrs and extend measuring point, and
Target place earthquake ground motion acceleration time-history curves are fitted, then carry out step (6)；
If doing the numerical simulation of load seismic wave around ground fissure place, and earthquake ground motion acceleration time-history curves are obtained,
Then directly carry out step (6)；
Step (6) determines that each measuring point earthquake motion of disk is put in ground fissure according to target place earthquake ground motion acceleration time-history curves
Big factor gammaUpper i, each measuring point earthquake motion amplification factor γ of ground fissure lower wallLower iWith earthquake motion coverage η, wherein disk in ground fissure
Each measuring point earthquake motion amplification factor γUpper iFor each measuring point earthquake of disk in ground fissure on the earthquake ground motion acceleration time-history curves of target place
The ratio of the steady acceleration of acceleration and acceleration-time curve, each measuring point earthquake motion amplification factor γ of ground fissure lower wallLower iFor
Each measuring point seismic acceleration of ground fissure lower wall and acceleration-time curve is flat on the earthquake ground motion acceleration time-history curves of target place
The ratio of steady acceleration, earthquake motion coverage η are that target place earthquake ground motion acceleration time-history curves just start to tend to be steady
The earthquake motion coverage of abscissa corresponding to measuring point, upper and lower two disks of ground fissure is approximately uniform；Wherein, i is from ground fissure
The number of different measuring points, i are followed successively by 1,2,3,4 from the near to the remote ... ...；When steady acceleration is target place earthquake ground motion acceleration
Journey curve ordinate mean value corresponding to each measuring point after tending to be steady；
Step (8), according to each measuring point earth pulsation amplification factor α of the upper disk in target placeUpper i, each measuring point earth pulsation of lower wall puts
Big factor-alphaLower i, earth pulsation coverage β, disk earthquake motion amplification factor γ in ground fissureUpper i, ground fissure lower wall earthquake motion amplification because
Sub- γLower iDisk earthquake motion and earth pulsation amplification factor ratio in each measuring point ground fissure in target place are determined with earthquake motion coverage η
aUpper i, each measuring point earthquake motion of ground fissure lower wall and earth pulsation amplification factor ratio aLower iIt is influenced with ground fissure land seismic dynamic and earth pulsation
Range ratio b, and according to all aUpper iWith all aLower iDisk earthquake motion and earth pulsation amplification factor ratio in ground fissure are fitted respectively
Curve AOnWith the earthquake motion of ground fissure lower wall and earth pulsation amplification factor than curve AUnder(referring to figure 6 and figure 7), disk earthquake in ground fissure
Dynamic and earth pulsation amplification factor is than curve AOnIn, using away from ground fissure distance as abscissa, with disk earthquake motion and the vein of the earth in ground fissure
Dynamic amplification factor ratio aOnFor ordinate；Disk earthquake motion and earth pulsation amplification factor are than curve A in ground fissureUnderIn, away from ground fissure
Distance is abscissa, with disk earthquake motion in ground fissure and earth pulsation amplification factor ratio aUnderFor ordinate；Wherein, aUpper i=γUpper i/
αUpper i, aLower i=γLower i/αLower i, b=η/β；
Step (9) is built the building wait set up defences on place identical with target Geological condition and is set referring to Fig. 4
It is anti-, process are as follows:
Structure building foundation is determined away from ground fissure place distance L, if L >=η, building is built in design according to " building aseismicity
Design specification GB50011-2010 " regulation basic seismic design acceleration value；
If L < η, and the disk in ground fissure is built in building, then according between structure building foundation and target place ground fissure away from
The corresponding upper disk earth pulsation amplification factor in structure building foundation position is determined from Response Spectrum fitting curve；It is built further according to building
The corresponding upper disk earth pulsation amplification factor in basic position disk earthquake motion and earth pulsation amplification factor in ground fissure compare curve
AOnDisk earthquake motion amplification factor in the corresponding ground fissure of upper determining structure building foundation (referring to Fig. 5)；Then building build design when
Multiplied by structure building foundation pair on the basis of basic earthquake acceleration value as defined in " seismic design provision in building code GB50011-2010 "
Disk earthquake motion amplification factor in the ground fissure answered；
If L < η, and building is built in ground fissure lower wall, then according between structure building foundation and target place ground fissure away from
The corresponding lower wall earth pulsation amplification factor in structure building foundation position is determined from Response Spectrum fitting curve；It is built further according to building
The corresponding lower wall earth pulsation amplification factor in basic position compares curve in the earthquake motion of ground fissure lower wall and earth pulsation amplification factor
AUnderThe corresponding ground fissure lower wall earthquake motion amplification factor of upper determining structure building foundation；Then building is built in design in " building aseismicity
Design specification GB50011-2010 " as defined on the basis of basic earthquake acceleration value multiplied by the corresponding ground fissure of structure building foundation
Lower wall earthquake motion amplification factor.
Embodiment:
It is provided fortification against earthquakes with what f6 ground fissure place earthquake enlarge-effect progress construction in Xi'an was built, process is as follows:
Step (1) determines Xi'an f6 ground fissure, is symmetrical arranged in f6 ground fissure upper lower burrs and distinguishes away from ground fissure vertical range
For the measuring point of 1.5m, 3m, 6m, 9m, 12m, 15m, 20m, 25m and 30m, and land used pulsating detection instrument each measuring point is carried out it is former
Bit test obtains target place earth pulsation acceleration-time curve；
Step (2), the target place earth pulsation acceleration-time curve obtained to step 1 are analyzed, and each measuring point is obtained
Peak of response spectrum, and draw respectively using the peak of response spectrum of each measuring point as ordinate, to be abscissa away from ground fissure distance and anti-
Matched curve such as Fig. 2 and Fig. 3 should be composed；
Step (3) determines each measuring point response spectrum amplification factor S of disk in ground fissure according to Response Spectrum fitting curvei, ground fissure
Each measuring point response spectrum amplification factor X of lower walliAnd response spectrum coverage l, wherein each measuring point response spectrum amplification of disk in ground fissure
Factor Si(respectively S1、S2、S3、S4、S5、S6、S7、S8And S9) be ground fissure on each measuring point peak of response spectrum of disk with react spectral peak
It is worth the ratio of steady peak value, each measuring point response spectrum amplification factor of disk (direction NS (North and South direction), the direction EW in ground fissure in Fig. 5
(east-west direction) and the direction UD (up and down direction) is maximized) it is respectively S1=1.73, S2=1.6, S3=1.35, S4=
1.2、S5=1.1, S6=1.0, S7=1.0, S8=1.0 and S9=1.0；Each measuring point response spectrum amplification factor X of ground fissure lower walli
(respectively X1、X2、X3、X4、X5、X6、X7、X8And X9) it is that each measuring point peak of response spectrum of ground fissure lower wall and peak of response spectrum are steady
The ratio of peak value, (direction NS, the direction EW and the direction UD take maximum to each measuring point response spectrum amplification factor of ground fissure lower wall in Fig. 5
Value) it is respectively X1=1.7, X2=1.5, X3=1.4, X4=1.2, X5=1.05, X6=1.0, X7=1.0, X8=1.0 and X9=
1.05；Response spectrum coverage l is Response Spectrum fitting curve abscissa corresponding when just starting to tend to be steady, above and below ground fissure
The response spectrum coverage of two disks is approximately uniform, and referring to Fig. 5, response spectrum coverage may each be about 15m in ground fissure upper lower burrs, therefore
Response spectrum coverage l=15m；
Step (4), with each measuring point response spectrum amplification factor S of disk in ground fissureiAs each measuring point earth pulsation of disk in ground fissure
Amplification factor αUpper i；With each measuring point response spectrum amplification factor X of ground fissure lower walliAs the amplification of each measuring point earth pulsation of ground fissure lower wall because
Sub- αLower i；Using response spectrum coverage l as earth pulsation coverage β, then there is disk each point amplification factor α in ground fissureUpper 1=S1=
1.73、αUpper 2=S2=1.6, αUpper 3=S3=1.35, αUpper 4=S4=1.2, αUpper 5=S5=1.1, αUpper 6=S6=1.0, αUpper 7=S7=
1.0、αUpper 8=S8=1.0 and αUpper 9=S9=1.0；Ground fissure lower wall each point amplification factor αLower 1=X1=1.7, αLower 2=X2=1.5,
αLower 3=X3=1.4, αLower 4=X4=1.2, αLower 5=X5=1.05, αLower 6=X6=1.0, αLower 7=X7=1.0, αLower 8=X8=1.0 Hes
αLower 9=X9=1.05；Earth pulsation coverage β=l=15m.
Step (5), since the numerical simulation of load seismic wave was not done in Xi'an f6 ground fissure place, so needing to this
Area load seismic wave carries out numerical simulation, and fits target place earthquake ground motion acceleration time-history curves；
Such as Fig. 6 and Fig. 7, when simulation, respectively be 1.5m, 3m away from ground fissure vertical range, 6m, 9m, 12m, 15m, 20m,
Measuring point is arranged in 25m, 30m, 35m, 40m, 45m, 50m, 55m and 60m, wherein the measuring point of 35m, 40m, 45m, 50m, 55m and 60m
For the extension measuring point of ground fissure upper lower burrs, when loading seismic wave progress numerical simulation, load EL-Centro wave carries out Numerical-Mode
It is quasi-；
Step (6) determines that each measuring point earthquake motion of disk is put in ground fissure according to target place earthquake ground motion acceleration time-history curves
Big factor gammaUpper i, each measuring point earthquake motion amplification factor γ of ground fissure lower wallLower iWith earthquake motion coverage η, wherein disk in ground fissure
Each measuring point earthquake motion amplification factor γUpper iFor each measuring point earthquake of disk in ground fissure on the earthquake ground motion acceleration time-history curves of target place
The ratio of the steady acceleration of acceleration and acceleration-time curve, each measuring point earthquake motion amplification factor γ of ground fissure lower wallLower iFor
Each measuring point seismic acceleration of ground fissure lower wall and acceleration-time curve is flat on the earthquake ground motion acceleration time-history curves of target place
The ratio of steady acceleration, earthquake motion coverage η are that target place earthquake ground motion acceleration time-history curves just start to tend to be steady
Abscissa corresponding to measuring point, referring to Fig. 7, each measuring point earthquake motion amplification factor γ of disk in ground fissureUpper iIt is respectively as follows: γUpper 1=
3.25 γUpper 2=2.5, γUpper 3=2.2, γUpper 4=2.1, γUpper 5=2.0, γUpper 6=2.8, γUpper 7=2.2, γUpper 8=1.8, γUpper 9
=1.9, γUpper 10=1.0, γUpper 11=1.0, γUpper 12=1.0, γUpper 13=1.0, γUpper 14=1.0, γUpper 15=1.0；Under ground fissure
Each measuring point earthquake motion amplification factor γ of diskLower iIt is respectively as follows: γLower 1=2.7, γLower 2=2.6, γLower 3=2.3, γLower 4=2.4, γLower 5=
2.65 γLower 6=2.2, γLower 7=1.8, γLower 8=1.5, γLower 9=0.9, γLower 10=1.0, γLower 11=1.0, γLower 12=1.0,
γLower 13=1.0, γLower 14=1.0, γLower 15=1.0；The earthquake motion coverage of two disks is approximately uniform above and below ground fissure, because of this place
Vibration influence range η is about 30m, determines η=30.
Step (7), disk earthquake motion and earth pulsation amplification factor ratio a in each measuring point ground fissureUpper i=γUpper i/αUpper i, under ground fissure
Each measuring point earthquake motion of disk and earth pulsation amplification factor ratio aLower i=γLower i/αLower i.For taking i=1, it is away from ground fissure distance in upper disk
At 1.5m, aUpper 1=γUpper 1/αUpper 1=3.25/1.84=1.77；Lower wall away from ground fissure distance be 1.5m at, aLower 1=γLower 1/αLower 1
=2.7/1.8=1.5, for the point away from other distances (non-measuring point) of ground fissure, it is only necessary in curve AOnOr curve AUnderFind this
Apart from corresponding amplification factor, remaining the step of it is identical as measuring point.Ground fissure land seismic dynamic and earth pulsation coverage ratio b=
η/β=30/15=2；
Step (8), after the numerical simulation for doing above-mentioned load seismic wave, for other and f6 near the f6 ground fissure of Xi'an
The same or similar ground fissure of ground fissure field geological conditions, only need to be according to structure building foundation away from ground fissure place distance L and earthquake
Relationship, structure building foundation between dynamic coverage η and the relationship between ground fissure, disk earthquake motion and earth pulsation are put in ground fissure
The big factor is than curve AOnOr the earthquake motion of ground fissure lower wall and earth pulsation amplification factor are than curve AUnder, seismic design provision in building code rule
Fixed, Response Spectrum fitting curve determines the seismic acceleration value at structure building foundation；
Step (9) determines structure building foundation away from Xi'an f6 ground fissure place distance:
If L >=30, building, which is built, to be designed in design according to the regulation of " seismic design provision in building code GB50011-2010 "
Basic earthquake acceleration value, basic earthquake acceleration value are 0.2g；
If L < 30, and the disk in ground fissure is built in building, then according between structure building foundation and target place ground fissure away from
The corresponding upper disk earth pulsation amplification factor in structure building foundation position is determined from Response Spectrum fitting curve；It is built further according to building
The corresponding upper disk earth pulsation amplification factor in basic position disk earthquake motion and earth pulsation amplification factor in ground fissure compare curve
AOnDisk earthquake motion amplification factor in the corresponding ground fissure of upper determining structure building foundation；Then building is built in design in " building aseismicity
Design specification GB50011-2010 " as defined on the basis of basic earthquake acceleration value multiplied by the corresponding ground fissure of structure building foundation
Upper disk earthquake motion amplification factor；
If L < 30, and building is built in ground fissure lower wall, then according between structure building foundation and target place ground fissure away from
The corresponding lower wall earth pulsation amplification factor in structure building foundation position is determined from Response Spectrum fitting curve；It is built further according to building
The corresponding lower wall earth pulsation amplification factor in basic position compares curve in the earthquake motion of ground fissure lower wall and earth pulsation amplification factor
AUnderThe corresponding ground fissure lower wall earthquake motion amplification factor of upper determining structure building foundation；Then building is built in design in " building aseismicity
Design specification GB50011-2010 " as defined on the basis of basic earthquake acceleration value multiplied by the corresponding ground fissure of structure building foundation
Lower wall earthquake motion amplification factor.
For away from ground fissure vertical range 1.5m, upper disk design acceleration is 0.2g*1.77=0.354g, lower wall design
Acceleration is 0.2g*1.5=0.3g.
Claims (8)
1. seismic fortification method is built in a kind of construction based on ground fissure place earthquake enlarge-effect, which is characterized in that including following
Step:
Step 1, the ground fissure for determining target place lays multiple surveys vertical with ground fissure in the upper lower burrs of ground fissure respectively
Point carries out earth pulsation in-situ test at measuring point, obtains target place earth pulsation acceleration-time curve；
Step 2, target place earth pulsation acceleration-time curve is analyzed, obtains the peak of response spectrum of each measuring point, and root
Response Spectrum fitting curve is drawn according to the peak of response spectrum of each measuring point；
Step 3, each measuring point response spectrum amplification factor S of disk in ground fissure is determined according to Response Spectrum fitting curvei, ground fissure lower wall it is each
Measuring point response spectrum amplification factor XiAnd response spectrum coverage l；Wherein, i is the different measuring points from the near to the remote from ground fissure
Number, i are followed successively by 1,2,3,4 ... ...；With each measuring point response spectrum amplification factor S of disk in ground fissureiIt is respectively surveyed as disk in ground fissure
Point earth pulsation amplification factor αUpper i；With each measuring point response spectrum amplification factor X of ground fissure lower walliAs each measuring point vein of the earth of ground fissure lower wall
Dynamic amplification factor αLower i；Using response spectrum coverage l as earth pulsation coverage β；
Step 4, target place earthquake ground motion acceleration time-history curves are obtained, it is true according to target place earthquake ground motion acceleration time-history curves
Determine each measuring point earthquake motion amplification factor γ of disk in ground fissureUpper i, each measuring point earthquake motion amplification factor γ of ground fissure lower wallLower iAnd earthquake
Dynamic coverage η；
Step 5, according to each measuring point earth pulsation amplification factor α of upper disk in target placeUpper i, each measuring point earth pulsation amplification factor of lower wall
αLower i, earth pulsation coverage β, disk earthquake motion amplification factor γ in ground fissureUpper i, ground fissure lower wall earthquake motion amplification factor γLower i
Disk earthquake motion and earth pulsation amplification factor ratio a in each measuring point ground fissure in target place are determined with earthquake motion coverage ηUpper i,
Each measuring point earthquake motion of crack lower wall and earth pulsation amplification factor ratio aLower iWith ground fissure land seismic dynamic and earth pulsation coverage ratio
B, and according to all aUpper iWith all aLower iDisk earthquake motion and earth pulsation amplification factor are fitted in ground fissure respectively than curve AOn
With the earthquake motion of ground fissure lower wall and earth pulsation amplification factor than curve AUnder；
Step 6, progress is built treating the building set up defences on place in place to be set up defences identical with target place for geological conditions
When setting up defences, according to structure building foundation away from the relationship between ground fissure place distance L and earthquake motion coverage η, structure building foundation
Disk earthquake motion and earth pulsation amplification factor are than curve A in relationship, ground fissure between ground fissureOnOr ground fissure lower wall earthquake motion
With earth pulsation amplification factor than curve AUnder, seismic design provision in building code regulation and Response Spectrum fitting curve determine that base is built in building
Seismic acceleration value at plinth.
2. seismic fortification method is built in a kind of construction based on ground fissure place earthquake enlarge-effect according to claim 1,
It is characterized in that, each measuring point response spectrum amplification factor S of disk in ground fissureiFor each measuring point peak of response spectrum of disk in ground fissure with react
The ratio of the steady peak value of spectrum peak, each measuring point response spectrum amplification factor X of ground fissure lower walliFor each measuring point response spectrum of ground fissure lower wall
The ratio of peak value and the steady peak value of peak of response spectrum, response spectrum coverage l are that Response Spectrum fitting curve just starts to tend to be steady
When point corresponding to abscissa.
3. seismic fortification method is built in a kind of construction based on ground fissure place earthquake enlarge-effect according to claim 1,
It is characterized in that, each measuring point earthquake motion amplification factor γ of disk in ground fissureUpper iFor on the earthquake ground motion acceleration time-history curves of target place
The ratio of the steady acceleration of each measuring point seismic acceleration of disk and acceleration-time curve, each measuring point of ground fissure lower wall in ground fissure
Earthquake motion amplification factor γLower iFor each measuring point seismic acceleration of ground fissure lower wall on the earthquake ground motion acceleration time-history curves of target place
With the ratio of the steady acceleration of acceleration-time curve, earthquake motion coverage η is target place earthquake ground motion acceleration time-histories
Abscissa corresponding to point when curve just starts to tend to be steady, wherein steady acceleration is target place earthquake ground motion acceleration
Time-history curves ordinate mean value corresponding to each measuring point after tending to be steady.
4. seismic fortification method is built in a kind of construction based on ground fissure place earthquake enlarge-effect according to claim 1,
It is characterized in that, detailed process is as follows for step 6:
If L >=η, the regulation basic seismic design acceleration value in design according to seismic design provision in building code is built in building；
If L < η, and the disk in ground fissure is built in building, then according to the distance between structure building foundation and target place ground fissure and
Response Spectrum fitting curve determines the corresponding upper disk earth pulsation amplification factor in structure building foundation position；Further according to structure building foundation
The corresponding upper disk earth pulsation amplification factor in position in ground fissure disk earthquake motion and earth pulsation amplification factor than curve AOnOn
Determine disk earthquake motion amplification factor in the corresponding ground fissure of structure building foundation；Then building, which is built, advises in design in Seismic Design of Building
Multiplied by disk earthquake motion amplification factor in the corresponding ground fissure of structure building foundation on the basis of basic earthquake acceleration value as defined in model；
If L < η, and building is built in ground fissure lower wall, then according to the distance between structure building foundation and target place ground fissure and
Response Spectrum fitting curve determines the corresponding lower wall earth pulsation amplification factor in structure building foundation position；Further according to structure building foundation
The corresponding lower wall earth pulsation amplification factor in position is in the earthquake motion of ground fissure lower wall and earth pulsation amplification factor than curve AUnderOn
Determine the corresponding ground fissure lower wall earthquake motion amplification factor of structure building foundation；Then building, which is built, advises in design in Seismic Design of Building
Multiplied by the corresponding ground fissure lower wall earthquake motion amplification factor of structure building foundation on the basis of basic earthquake acceleration value as defined in model.
5. seismic fortification method is built in a kind of construction based on ground fissure place earthquake enlarge-effect according to claim 1,
It is characterized in that, in step 1, symmetrically lay measuring point in the upper lower burrs of ground fissure, the concentration of measuring point with away from ground fissure away from
From increase and constantly reduce.
6. seismic fortification method is built in a kind of construction based on ground fissure place earthquake enlarge-effect according to claim 1,
It is characterized in that, the steady peak value of peak of response spectrum is reaction spectral peak corresponding to each measuring point after Response Spectrum fitting curve tends to be steady
The mean value of value.
7. seismic fortification method is built in a kind of construction based on ground fissure place earthquake enlarge-effect according to claim 1,
It is characterized in that, when obtaining target place earthquake ground motion acceleration time-history curves, adding if being done around ground fissure place in step 4
The numerical simulation of seismic wave is carried, and obtains earthquake ground motion acceleration time-history curves, then ground cleave is determined according to the acceleration-time curve
Sew on each measuring point earthquake motion amplification factor γ of diskUpper i, each measuring point earthquake motion amplification factor γ of ground fissure lower wallLower iIt is influenced with earthquake motion
Range η.
8. seismic fortification method is built in a kind of construction based on ground fissure place earthquake enlarge-effect according to claim 7,
It is characterized in that, if the numerical simulation of load seismic wave was not done around ground fissure place, to loading around ground fissure
The numerical simulation of seismic wave, in step 1 on the basis of the measuring point of progress earth pulsation in-situ test, also in ground fissure upper lower burrs pair
Claim to lay and extend measuring point, and fits target place earthquake ground motion acceleration time-history curves.
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