CN103469920A - Method for designing flexion restraining support of maintenance-free steel and composite material - Google Patents
Method for designing flexion restraining support of maintenance-free steel and composite material Download PDFInfo
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- CN103469920A CN103469920A CN2013104138393A CN201310413839A CN103469920A CN 103469920 A CN103469920 A CN 103469920A CN 2013104138393 A CN2013104138393 A CN 2013104138393A CN 201310413839 A CN201310413839 A CN 201310413839A CN 103469920 A CN103469920 A CN 103469920A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 46
- 239000010959 steel Substances 0.000 title claims abstract description 46
- 239000002131 composite material Substances 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000000452 restraining effect Effects 0.000 title abstract 8
- 102100040287 GTP cyclohydrolase 1 feedback regulatory protein Human genes 0.000 claims abstract description 22
- 101710185324 GTP cyclohydrolase 1 feedback regulatory protein Proteins 0.000 claims abstract description 22
- 230000008878 coupling Effects 0.000 claims description 18
- 238000010168 coupling process Methods 0.000 claims description 18
- 238000005859 coupling reaction Methods 0.000 claims description 18
- 238000013461 design Methods 0.000 claims description 9
- 238000012360 testing method Methods 0.000 claims description 5
- 230000032798 delamination Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000002023 wood Substances 0.000 claims description 4
- 230000007246 mechanism Effects 0.000 abstract description 3
- 238000012913 prioritisation Methods 0.000 description 7
- 238000011160 research Methods 0.000 description 5
- 230000033228 biological regulation Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000013016 damping Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000008569 process Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
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Abstract
The invention discloses a method for designing a flexion restraining support of maintenance-free steel and a composite material. The method includes following steps: step 1, determining the sectional area of an inner core stressing unit of the novel flexion restraining support of the maintenance-free steel and the composite material according to structural inner force analysis; step2, calculating the yield load of the inner core stressing unit of the novel flexion restraining support of the maintenance-free steel and the composite material and the ultimate load of the flexion restraining support; step3, determining the sectional dimension of a GFRP restraining unit; step4, determining the form and the size of an expansion joint; and step5, calculating support connection segments according to the ultimate load of the flexion restraining support. The flexion restraining support of the maintenance-free steel and the composite material can be designed flexiblely as needed, and on the basis that the support is guaranteed to achieve mechanism, the support is of both integrity and tightness. Besides, the method is convenient, simple in structure, and fine in performance.
Description
Technical field
The invention belongs to the buckling restrained brace technical field, relate in particular to the method for designing of a kind of maintenance-free steel-composite material buckling restrained brace.
Background technology
Japan and the U.S. carry out structure control architectural study country early, and the complete member of buckling restrained brace appears at Japan the earliest, are referred to as position by the compositing characteristic supported at that time and support without bonding, in India in 1981, also carry out correlative study.
Start this support of application in engineering after U.S. Zi Bei ridge earthquake, and be referred to as Buckling restrained Brace(abbreviation BRB by the loading characteristic supported), although the research of the U.S. is more late, but rely on the superiority developments such as its economy and technology rapid, since nineteen ninety-eight, at its high intensity Zone, the Utah State, Oregon, the area such as California is used for many places new construction and aseismatic reinforcement engineering by buckling restrained brace, on the basis of theory analysis and experimental study, calendar year 2001 is by northern California associating American Iron and Steel Institute of structural engineer association and California structural engineer association, worked out recommendation regulation clause for buckling restrained brace especially, during this clause was included in its anti-seismic regulation FEMA450 in 2003 by FEMA (FEMA), to buckling-restrained member and structural system, Canada, New Zealand, also there is the record of engineering application Korea S and China Taiwan, to the research of buckling restrained brace, be the means of taking test substantially at present.
Buckling-restrained bracing member is widely used in external office, hospital, school, municipal administration, in the series engineerings such as stadiums, the application project total quantity is over 500, it is applied at home in the initial stage developing stage, but encouraging progress has been arranged, within 2005, start China in Taiwan, Beijing, Shanghai, the ground such as Xi'an and Taiyuan also has tens building building integrals or part to adopt buckling-restrained bracing member, after Wenchuan earthquake occurs, domestic the antidetonation safety problem is paid much attention to, buckling restrained brace is as a kind of efficient and economic damping device, development potentiality is very huge, buckling restrained brace research at home just starts, " seismic design provision in building code " (GB5001-2010) content of middle Passing to insulate the earthquake energy and passing toexpend the earthquake energy part lacks for the design of buckling restrained brace and support frame system and the concrete regulation of calculating, product standard is still in blank, for adapting to requirement of engineering, include the correlation technique of buckling restrained brace in by the near future in relevant criterion.
Summary of the invention
The purpose of the embodiment of the present invention is to provide the method for designing of a kind of maintenance-free steel-composite material buckling restrained brace, be intended to solve buckling restrained brace as a kind of efficient and economic damping device, the research on steel tower structure and bridge construction and the problem of applying shortage.
The embodiment of the present invention is achieved in that the method for designing of a kind of maintenance-free steel-composite material buckling restrained brace, and the method for designing of this maintenance-free steel-composite material buckling restrained brace comprises the following steps:
Step 1, according to Internal Forces Analysis, determine the sectional area of novel maintenance-free steel-composite material buckling restrained brace inner core stress unit;
Further, in step 1, support the required sectional area of inner core stress unit
a wherein
refor supporting the required sectional area of inner core stress unit, P
ffor the suffered axle power of supporting member, f
yfor supporting the nominal yield stress of kernel steel core.
Further, in step 2, the yield load F of inner core stress unit axial tension pressurized
yx=A
n* f
y, f wherein
yfor the nominal yield strength of inner core stress unit or the yield stress of being surveyed by the wood property test; A
nnet cross-sectional area for the inner core stress unit.
Further, in step 2, ultimate load
the superpower coefficient that wherein Ω is steel, ω is the material strain coefficient of intensification,
for supporting the incomplete coefficient of delamination.
Further, in step 3, the requirement of the second moment of area I of constraint element is:
Further, in step 4, the rigidity of expansion coupling is got and is supported 1/100 of rigidity while entering nonlinear phase.
Further, in step 5, the design load of support and connection section need meet 0.9A
if
y>=F
max, F wherein
maxfor the ultimate load supported, A
ifor the effective area of support and connection section, f
yfor supporting the nominal yield stress of inner core stress unit.
Further, maintenance-free steel-composite material buckling restrained brace device comprises: GFRP constraint element, expansion coupling, support and connection section, support kernel steel core, limiting card;
Expansion coupling is arranged on the two ends of support and connection section, and limiting card is arranged on the centre of supporting the kernel steel core, and the GFRP constraint element surrounds the support kernel steel core that supports constraint.
The method for designing of maintenance-free steel provided by the invention-composite material buckling restrained brace, flexible design steel-composite material buckling support as required; And guaranteed to support on the basis that mechanism realizes and had globality and sealing simultaneously concurrently, preferably resolve buckling restrained brace as a kind of efficient and economic damping device, development potentiality is very huge, the problem that the research of buckling restrained brace on Steel Tower Structures and bridge construction lacks.In addition, the present invention is simple in structure, and method is convenient, and the method for designing of a kind of maintenance-free steel of function admirable-composite material buckling restrained brace is provided.
The accompanying drawing explanation
Fig. 1 is the flow chart of the method for designing of the maintenance-free steel that provides of the embodiment of the present invention-composite material buckling restrained brace;
Fig. 2 is the structural representation of the device of the maintenance-free steel that provides of the embodiment of the present invention-composite material buckling restrained brace;
Fig. 3 is the sectional view of the device of the maintenance-free steel that provides of the embodiment of the present invention-composite material buckling restrained brace;
In figure: 1, GFRP constraint element; 2, expansion coupling; 3, support and connection section; 4, support the kernel steel core; 5, limiting card.
The specific embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Fig. 1 shows the method for designing flow process of maintenance-free steel provided by the invention-composite material buckling restrained brace.For convenience of explanation, only show part related to the present invention.
The method for designing of maintenance-free steel of the present invention-composite material buckling restrained brace, the method for designing of this maintenance-free steel-composite material buckling restrained brace comprises the following steps:
Step 1, according to Internal Forces Analysis, determine the sectional area of novel maintenance-free steel-composite material buckling restrained brace inner core stress unit;
As a prioritization scheme of the embodiment of the present invention, in step 1, support the required sectional area of inner core stress unit
a wherein
refor supporting the required sectional area of inner core stress unit, P
ffor the suffered axle power of supporting member, f
yfor supporting the nominal yield stress of kernel steel core.
As a prioritization scheme of the embodiment of the present invention, in step 2, the yield load F of inner core stress unit axial tension pressurized
yx=A
n* f
y, f wherein
yfor the nominal yield strength of inner core stress unit or the yield stress of being surveyed by the wood property test; A
nnet cross-sectional area for the inner core stress unit.
As a prioritization scheme of the embodiment of the present invention, in step 2, ultimate load
the superpower coefficient that wherein Ω is steel, ω is the material strain coefficient of intensification,
for supporting the incomplete coefficient of delamination.
As a prioritization scheme of the embodiment of the present invention, in step 3, the requirement of the second moment of area I of constraint element is:
the modulus of elasticity that wherein E is the GFRP constraint element; The length that l is constraint element; ξ is about beam ratio.
As a prioritization scheme of the embodiment of the present invention, in step 4, the rigidity of expansion coupling is got and is supported 1/100 of rigidity while entering nonlinear phase.
As a prioritization scheme of the embodiment of the present invention, in step 5, the design load of support and connection section need meet 0.9A
if
y>=F
max, F wherein
maxfor the ultimate load supported, A
ifor the effective area of support and connection section, f
yfor supporting the nominal yield stress of inner core stress unit.
As a prioritization scheme of the embodiment of the present invention, maintenance-free steel-composite material buckling restrained brace device comprises: GFRP constraint element, expansion coupling, support and connection section, support kernel steel core, limiting card;
Expansion coupling is arranged on the two ends of support and connection section, and limiting card is arranged on the centre of supporting the kernel steel core, and the GFRP constraint element surrounds the support kernel steel core that supports constraint.
Below in conjunction with drawings and the specific embodiments, application principle of the present invention is further described.
As shown in Figure 1, the design method of the maintenance-free steel of the embodiment of the present invention-composite material buckling restrained brace comprises the following steps:
S101: according to Internal Forces Analysis, ratio according to the lateral rigidity of works own and diagonal brace rigidity, dispensed, to the external force supported on axial direction, is selected the stress ratio of this power effect lower support, determines the sectional area of novel maintenance-free steel-composite material buckling restrained brace inner core stress unit;
S102: calculate the novel maintenance-free steel-yield load of composite material buckling restrained brace inner core stress unit and the ultimate load of buckling restrained brace;
S103: for before the total cross-section pressurized surrender that guarantees the inner core stress unit occurs in the whole unstability of buckling restrained brace, need to make the total cross-section yield load of the whole Critical Load of support higher than the inner core stress unit, thus the sectional dimension of calculative determination GFRP constraint element;
S104: form and the size of determining expansion coupling;
S105: during for the assurance support works, flexing unstability or yield failure, all the time in elastic stage, do not occur in linkage section, need to calculate the support and connection section according to the ultimate load of buckling restrained brace.
Concrete steps of the present invention are:
Step 1, according to Internal Forces Analysis, determine the sectional area of novel maintenance-free steel-composite material buckling restrained brace inner core stress unit; Supporting the required sectional area of inner core stress unit is
a wherein
refor supporting the required sectional area of inner core stress unit, P
ffor the suffered axle power of supporting member, f
yfor supporting the nominal yield stress of kernel steel core.
As shown in Figure 2, the device of maintenance-free steel of the present invention-composite material buckling restrained brace comprises GFRP constraint element 1, expansion coupling 2, support and connection section 3, supports kernel steel core 4, limiting card 5; Expansion coupling 2 is arranged on the two ends of support and connection section 3, and limiting card 5 is arranged on the centre of supporting kernel steel core 3, and GFRP constraint element 1 surrounds the support kernel steel core 4 that supports constraint.
When maintenance-free steel of the present invention-composite material buckling restrained brace is worked, steel supports to be done as a whole stressed with outside GFRP, but than the inner core stress unit, the expansion coupling axial rigidity is less, axle power is assigned to outside GFRP part seldom, and the axial push-pull power that support is born can be considered is fully born by the inner core stress unit.The inner core stress unit can reach surrender when tension; During pressurized, as long as the GFRP constraint element has enough bending rigidities, the inner core stress unit can reach the total cross-section surrender.
The present invention has flexible design steel-composite material buckling support as required, and guaranteed to support the advantage that simultaneously has globality and sealing on the basis that mechanism realizes concurrently.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. the method for designing of maintenance-free steel-composite material buckling restrained brace, is characterized in that, the method for designing of this maintenance-free steel-composite material buckling restrained brace comprises the following steps:
Step 1, according to Internal Forces Analysis, determine the sectional area of novel maintenance-free steel-composite material buckling restrained brace inner core stress unit;
Step 2, calculate the novel maintenance-free steel-yield load of composite material buckling restrained brace inner core stress unit and the ultimate load of buckling restrained brace;
Step 3, determine the sectional dimension of GFRP constraint element;
Step 4, determine form and the size of expansion coupling;
Step 5, calculate the support and connection section according to the ultimate load of buckling restrained brace.
2. the method for designing of maintenance-free steel as claimed in claim 1-composite material buckling restrained brace, is characterized in that, in step 1, supports the required sectional area of inner core stress unit
a wherein
refor supporting the required sectional area of inner core stress unit, P
ffor the suffered axle power of supporting member, f
yfor supporting the nominal yield stress of kernel steel core.
3. the method for designing of maintenance-free steel as claimed in claim 1-composite material buckling restrained brace, is characterized in that, in step 2, and the yield load F of inner core stress unit axial tension pressurized
yx=A
n* f
y, f wherein
yfor the nominal yield strength of inner core stress unit or the yield stress of being surveyed by the wood property test; A
nnet cross-sectional area for the inner core stress unit.
4. the method for designing of maintenance-free steel as claimed in claim 1-composite material buckling restrained brace, is characterized in that, in step 2, and ultimate load
the superpower coefficient that wherein Ω is steel, ω is the material strain coefficient of intensification,
for supporting the incomplete coefficient of delamination.
5. the method for designing of maintenance-free steel as claimed in claim 1-composite material buckling restrained brace, is characterized in that, in step 3, the requirement of the second moment of area I of constraint element is:
the modulus of elasticity that wherein E is the GFRP constraint element; The length that l is constraint element; ξ is about beam ratio.
6. the method for designing of maintenance-free steel as claimed in claim 1-composite material buckling restrained brace, is characterized in that, in step 4, the rigidity of expansion coupling is got and supported 1/100 of rigidity while entering nonlinear phase.
7. the method for designing of maintenance-free steel as claimed in claim 1-composite material buckling restrained brace, is characterized in that, in step 5, the design load of support and connection section need meet 0.9A
if
y>=F
max, F wherein
maxfor the ultimate load supported, A
ifor the effective area of support and connection section, f
yfor supporting the nominal yield stress of inner core stress unit.
8. the method for designing of maintenance-free steel as claimed in claim 1-composite material buckling restrained brace, it is characterized in that, maintenance-free steel-composite material buckling restrained brace device comprises: GFRP constraint element, expansion coupling, support and connection section, support kernel steel core, limiting card;
Expansion coupling is arranged on the two ends of support and connection section, and limiting card is arranged on the centre of supporting the kernel steel core, and the GFRP constraint element surrounds the support kernel steel core that supports constraint.
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| CN201310413839.3A CN103469920B (en) | 2013-09-11 | 2013-09-11 | A kind of method for designing of maintenance-free steel-composite material buckling restrained brace |
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| CN201310413839.3A CN103469920B (en) | 2013-09-11 | 2013-09-11 | A kind of method for designing of maintenance-free steel-composite material buckling restrained brace |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103711804A (en) * | 2014-01-02 | 2014-04-09 | 上海理工大学 | High-bending inherent frequency guiding-type rotary swaging shaft lightweight design method |
| CN103807281A (en) * | 2014-03-13 | 2014-05-21 | 上海纳铁福传动系统有限公司 | Lightweight design method of high-torsional-rigidity drive shaft |
| CN105442720A (en) * | 2015-12-04 | 2016-03-30 | 江苏省城市规划设计研究院 | Method for optimally designing buckling restrained braces and brace structure system |
| CN109281307A (en) * | 2018-11-10 | 2019-01-29 | 重庆大学 | A kind of offshore jacket platforms anti-seismic structure new system containing buckling restrained brace |
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| CN101463632A (en) * | 2008-09-16 | 2009-06-24 | 同济大学 | Once variable cross-section cross buckling-restrained bracing member |
| CN102587533A (en) * | 2012-03-22 | 2012-07-18 | 北京工业大学 | Buckling restrained brace with parallel mild steel plate energy dissipation devices at two ends and method for manufacturing buckling restrained brace |
| CN103273663A (en) * | 2013-06-04 | 2013-09-04 | 南京工业大学 | Manufacturing method of maintenance-free steel-composite material buckling restrained brace |
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2013
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| CN101463632A (en) * | 2008-09-16 | 2009-06-24 | 同济大学 | Once variable cross-section cross buckling-restrained bracing member |
| CN102587533A (en) * | 2012-03-22 | 2012-07-18 | 北京工业大学 | Buckling restrained brace with parallel mild steel plate energy dissipation devices at two ends and method for manufacturing buckling restrained brace |
| CN103273663A (en) * | 2013-06-04 | 2013-09-04 | 南京工业大学 | Manufacturing method of maintenance-free steel-composite material buckling restrained brace |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103711804A (en) * | 2014-01-02 | 2014-04-09 | 上海理工大学 | High-bending inherent frequency guiding-type rotary swaging shaft lightweight design method |
| CN103711804B (en) * | 2014-01-02 | 2016-01-20 | 上海理工大学 | High natural bending frequency guidance type is swaged axle light-weight design method |
| CN103807281A (en) * | 2014-03-13 | 2014-05-21 | 上海纳铁福传动系统有限公司 | Lightweight design method of high-torsional-rigidity drive shaft |
| CN103807281B (en) * | 2014-03-13 | 2016-01-20 | 上海纳铁福传动系统有限公司 | A kind of light-weight design method of high torsional stiffness transmission shaft |
| CN105442720A (en) * | 2015-12-04 | 2016-03-30 | 江苏省城市规划设计研究院 | Method for optimally designing buckling restrained braces and brace structure system |
| CN105442720B (en) * | 2015-12-04 | 2017-08-25 | 江苏省城市规划设计研究院 | The Optimization Design and Bracing Systems of a kind of buckling restrained brace |
| CN109281307A (en) * | 2018-11-10 | 2019-01-29 | 重庆大学 | A kind of offshore jacket platforms anti-seismic structure new system containing buckling restrained brace |
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| CN103469920B (en) | 2016-01-20 |
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