Embodiment
Below, as the embodiments of the present invention, the link ironware being described in detail as follows with reference to accompanying drawing: be attached between a pair of object parts that form building construction the energy absorption that performance is corresponding with relative displacement between these object parts.
[the first mode of execution]
Fig. 1 means the stereogram of the detailed structure of ironware 1 for the link of first embodiment of the invention, and Fig. 2 is its planimetric map, side view when Fig. 3 represents to observe from the paper left side of Fig. 2.Linking is a steel plate that is formed U-steel with ironware 1, and this U-steel has: OBL web 2; And pair of flanges 3, one and being formed on squarely on the Ji Gechang limit, two ends of this web 2.
On web 2, in the mode connecting in the thickness of slab direction at web 2, be formed with a plurality of slit pores 21.These slit pores 21 are configured to, and towards the width direction B with long side direction A quadrature of web 2, become lengthwise.In the present embodiment, the shape of these slit pores 21 becomes rhombus, but is not only defined in rhombus, and can be also becomes the rectangular of lengthwise towards width direction B, also can adopt other polygon-shaped, uncertain shape.These slit pores 21 are, in the situation that observe along the width direction B of web 2, separate predetermined distance and break-through is provided with 2, but the break-through on this width direction B arranges number are not limited only to 2, also can form more than 3.In addition, between a pair of slit pore 21 adjoining each other along this width direction B, be configured to the second linking department 28.Each slit pore 21 is, in the situation that observe along the long side direction A of web 2, separates predetermined distance and arow disposes a plurality of (being in the present embodiment 4).
In addition,, on web 2, in the end positions of long side direction A, be formed with each slit pore 22.These slit pores 22 are compared with each slit pore 21, and opening area is larger.The width dimensions of the width direction B of these slit pores 22, consistent with the width dimensions at two ends of each slit pore 21 of having arranged 2 on width direction B.In addition, each slit pore 21 is arranged with a plurality of on width direction B, and on the other hand, each slit pore 22 forms respectively long hole on width direction B.The shape of these slit pores 22 can be arbitrarily, but is in the present embodiment, and the substantial middle of width direction B part comes to a point towards the end of long side direction A, and the size while observing along long side direction A is greater than the size of each slit pore 21.Thus, while carrying out shock absorption on web 2, can fully guarantee the movable area of the second linking department 28, even if in the situation that the distortion quantitative change of web 2 is large due to violent earthquake also can tackle.In addition, slit pore 22 with the edge 22a1s of each slit pore 21 in abutting connection with sides, form following shape: almost become line symmetry with the contour shape that forms each slit pore 21 of almost diamond.
In addition, as mentioned above, each slit pore 22 and the edge 22a2 opposed side of above-mentioned edge 22a1, become obtuse angle and come to a point, and these front end 22a3 that come to a point have given size (for example 4mm) and have the smooth shape along width direction B towards the end of long side direction A.
And the opposed mode of front end 22a3 with this edge 22a2 is formed with protuberance 22a4 on the middle position of edge 22a1.As the shape of this protuberance 22a1, for example, can adopt following shape: from the outstanding length of edge 22a1, be 5mm, and be 4mm along the width dimensions of width direction B.
The reason that this protuberance 22a4 is set is: when the second linking department 28 is welded and fixed on object parts, be sometimes difficult to be welded to reliably the two ends along long side direction A of the second linking department 28, because welding is insufficient, therefore may peel off from above-mentioned two ends.As in the present embodiment, in the mode that the two ends of each the second linking department 28 are extended, each protuberance 22a4 is set, can easily obtains being welded and fixed more reliably thus.
In addition, making above-mentioned front end 22a3 become the reason of even shape, is that the front end shape for the raised part 22a4 with smooth matches.By adopting this even shape, compare with the situation without par thus, can obtain significantly the cross-sectional length d of the central part of bridging portion 31
0(with reference to Fig. 2).As a result, can further improve the rigidity of bridging portion 31, therefore more preferably.
In addition, each end along width direction B of each slit 21,22, must be from the boundary line between web 2 and each flange 3 in its two ends, to web 2 inner face side, leave interval s.That is, the inner face side of each end of each slit 21,22 from each flange 3 to web 2, leaves the interval s equating with the width dimensions of the above-mentioned sandwiched 2X of portion.
By forming each slit pore 21,22 with shape as described above and configuration, on web 2, be formed with thus a plurality of damper portions 26.Fig. 4 represents the detail shape of each damper portion 26.
Damper portion 26 has two damping fins 25 of the dotted line in Fig. 4.These damping fins 25 are arranged between the slit 21,22 of adjacency between a pair of slit 21 of adjacency on long side direction A or on long side direction A.Each damping fin 25 carries out plastic deformation corresponding to the relative displacement to its long side direction A, brings into play thus power absorption function.These damping fins 25 are provided with 2 continuously along width direction B.The two end part of the width direction B of these damping fins 25, need to, from the boundary line between web 2 and each flange 3 in its two ends, leave interval s to web 2 inner face side.
As mentioned above, each slit pore 21 has almost diamond, so damping fin 25 is along the cross-sectional length d of the central part of width direction B
1be less than the cross-sectional length d at its two ends
2.In addition, between a pair of damping fin 25 adjoining each other along width direction B, via the second linking department 28, arrange continuously.In addition, each second linking department 28 being connected along long side direction A and a pair of raised part 22a4 that is positioned at their two ends, become to the standing part of above-mentioned object parts, in the present embodiment with the prerequisite that is fixed as based on welding, therefore do not form bolt hole.But it is fixed and is not only defined in welding, therefore also can be pre-formed bolt hole, is fixed by fixed components such as bolts.
Above-mentioned interval s is with respect to the cross-sectional length d at damping fin 25 two end part
2also can meet following (1) formula.
In addition, about the shape of damping fin 25, the cross-sectional length d of damping fin 25 central parts
1cross-sectional length d with two end part
2between relation also can meet following (2) formula.
L: the length along width direction B of damping fin 25 (mm)
D
1: the cross-sectional length (mm) of damping fin 25 central parts
D
2: the cross-sectional length (mm) at damping fin 25 two end part
In the situation that the shape of damping fin 25 meets above-mentioned (2) formula, the central part of damping fin 25 and two end part are crooked shear yielding side by side almost, and plastic deformation region expands to the whole region of damping fin 25, and the amount of energy of damping fin 25 increases.In addition,, due to the plastic deformation region expansion of damping fin 25, the yield strength that therefore can also suppress after plasticization rises.
As shown in Figure 2, in the link of present embodiment with being provided with a pair of architrave portion 32 on ironware 1.These architrave portions 32 consist of the position that approaches flange 3 of flange 3 and web 2.At this, the position that approaches flange 3 of so-called web 2, refers to from the end of the width direction B of web 2 till the region being represented by interval s of the end of slit pore 21, be the 2X of sandwiched portion.That is, this architrave portion 32 is configured in from the end of the width direction B of damper portion 26 till comprise flange 3 interior region.
In addition, in the link of present embodiment, use on ironware 1, on its web 2, dispose a pair of bridging portion 31.These bridging portions 31 are configured on web 2, in each end of long side direction A, are erected between above-mentioned a pair of architrave portion 32.These bridging portions 31 are, along width direction B and narrow and smallization of substantial middle part guarantees that damping fin 25 is along the working zone of long side direction A thus.In addition, the border about this bridging portion 31 with architrave portion 32, in the following description, in order to be conveniently defined as, compares with the straight line that represents interval s, and flange 3 sides are that the center side of architrave portion 32, width direction B is bridging portion 31.
In addition, form linking damper portion 26, bridging portion 31, architrave portion 32 with ironware 1, all a steel plate is processed and configured, is not to make respectively independently unit and link afterwards.
As shown in Figure 1, on each flange 3, along its long side direction A, separate uniformly-spaced, take the mode connecting in its thickness of slab direction and be formed with a plurality of (being 4 in the present embodiment) interior threaded hole 3a.In these interior threaded holes 3a, screw togather the fixed component (for example self-drilling screw 57 described later) while this link being fixed on object parts with ironware 1 by flange 3.In addition, in the present embodiment, by self-drilling screw 57, carry out the installation of each flange 3, but be not limited only to this structure, also can fix by welding.
In addition, as shown in Figure 3, the shape of the flange 3 of present embodiment, adopts the shape of the lateral margin bending of steel plate, but in addition, for example, also can become in the situation that with the sight line observation of this figure, the T word shape vertical with respect to web 2.
The link of stating in the use such structure is with in the situation of ironware 1, is arranged on on the object parts of absorbing vibrational energy and use.Particularly, using each flange 3 as the first linking department, using as described above on width direction B between the slit 21 of adjacency as the second linking department 28, these first linking departments and the second linking department 28 are respectively installed on object parts.
That is, each flange 3 as above-mentioned the first linking department and a side's object parts are linked, the second linking department 28 and the opposing party's object parts are linked.
Fig. 5, Fig. 6 represent to use ironware 1 between a pair of object parts, to have carried out the example linking by link.In this example, a side object parts are U-steel 169, and the opposing party's object parts are the steel pipe 92 linking with stone bolt 91.
Below, the assembling of the link of explanatory drawing 5, Fig. 6 structure.
First, steel pipe 92 is sandwiched to a pair of link with between ironware 1, and on each second linking department 28 such as waiting and be fixed by welding.
Then, make the parts that combine as described above, under the state by U-steel 169, by a plurality of self-drilling screws 57, be fixed.
Finally, stone bolt 91 is inserted and led in steel pipe 92, and be screwed to the upper and lower end butt with steel pipe 92 from the nut 105 that makes up and down of this stone bolt 91, be combined into thus above-mentioned link structure.
In having the power absorption structure of said structure, above-mentioned object parts are equivalent to the steel pipe 92 and the U-steel 169 that link with stone bolt 91.That is, in the situation that this U-steel 169 is such as being applied to post parts of slim Light Gauge Steel structure such as various building constructions, steel house etc. etc., the component axial C displacement as the stone bolt 91 of a side object parts in figure.As a result, the second linking department 28 of ironware 1 for the link that clamps between these object parts (stone bolt 91, U-steel 169), also along component axial C and load has shearing stress, also same load has moment of flexure.
As the example linking with the stress vector distribution of ironware 1, the vector of enumerating as shown in Figure 7 distributes.On each flange 3 as the first linking department, load has the stress σ along long side direction A shown in this Fig
a, so 32 loads of architrave portion have this stress σ
a.In addition,, for the second linking department 28, the upper load of long side direction A in the drawings has stress σ
b.Linked with ironware 1 load this stress σ
a, σ
bresult, to bridging portion, 31 loads have stress σ
c.In addition, based on stress σ
a, σ
b, this damping fin 25 itself is out of shape significantly, therefore on damping fin 25 except moment of flexure and shearing force, also effect has stress σ
d.By this stress σ
deffect, on damping fin 25, produce tensile stress.
When load has stress σ
a, σ
btime, first, each damping fin 25 bears moment of flexure and shearing force and surrenders.By making each slit pore 21 towards width direction B major diameter, thus corresponding to the relative displacement between each object parts, damping fin 25 can be along the crooked shear yielding of relative displacement direction (long side direction A too).In addition, when between each object parts, repeatedly produce along long side direction A relative displacement time, corresponding, each damping fin 25 plasticizations, result, realizes the power absorption based on each damping fin 25.When the amount of plastic deformation of each damping fin 25 increases, on each damping fin 25, except moment of flexure and shearing force, also start to produce above-mentioned tensile force (with σ
drightabout stress).
Be provided with in the present embodiment a pair of bridging portion 31, so the tensile stress producing on each damping fin 25, via each architrave portion 32, act on each bridging portion 31.These bridging portions 31 have and stress σ
csuitable resistivity, therefore can be by the tensile stress producing on bridging portion 31 burden damping fins 25.That is, can prevent from linking with the width dimensions at the two ends (bridging portion 31) of the long side direction A of ironware 1 and dwindle.
In addition, about the cross-sectional length d of the central part of bridging portion 31
0(with reference to Fig. 2), also can adopt and meet the such d of following (3) formula
0value.But, in the present embodiment, not by the cross-sectional length d of the central part of bridging portion 31
0only be defined in especially the scope of following (3) formula.
D
0: the cross-sectional length of the central part of bridging portion 31 (mm)
E: from the end of the damper portion 26 of the end positions in long side direction A till the distance at the center of the central cross-section of bridging portion 31 (mm)
N: the hop count of the damping fin 25 arranging continuously along long side direction A (the n=5 in the situation that of Fig. 7)
T: link the thickness of slab (mm) with ironware 1
Z
p: the plastic section modulus (mm of architrave portion 32
3)
By the mode of above-mentioned to meet (3) formula, set the cross-sectional length d of the central part of bridging portion 31
0, bridging portion 31 can not damaged before architrave portion 32 thus, can stably bear the tensile stress producing on damping fin 25.In addition, if by the cross-sectional length d of the central part of bridging portion 31
0be set as the cross-sectional length d of the central part of damping fin 25
1more than 1.5 times, bridging portion 31 can not rupture and can stably bear above-mentioned stress.In addition, from damping fin 25 till the distance e of bridging portion 31, be set as to the maximum value of the amount of plastic deformation of the long side direction A of damping fin 25 imaginations above.
Ironware 1 for link when Fig. 8 A represents to suppose not have bridging portion 31.In this case, as shown in the drawing, when load has above-mentioned stress σ
a, σ
btime, can not be supported in the stress σ producing on damping fin 25 by bridging portion 31
d.As a result, damping fin 25 shrinks on width direction B, and as shown in Figure 8 B, formation link is carried out face by shaped steel D direction in figure of ironware 1 and is out of shape outward.
On the other hand, in being provided with the present embodiment of bridging portion 31, this outer distortion can be suppressed, by damping fin 25, energy can be stably absorbed.
In addition, the ironware 1 for link according to present embodiment, possesses each architrave portion 32 as described above.Especially, these architrave portions 32 need to transmit stress to bridging portion 31, therefore need to have sufficient rigidity and yield strength.In this, this architrave portion 32 is configured to and comprises flange 3.That is, the region a little of the band in Fig. 9 A is this architrave portion 32, and it becomes stress bang path, but owing to there being flange 3, therefore can improve second moment of area, can improve architrave portion 32 own flexural rigidity and plastic section modulus.
With respect to this, in architrave portion 32, be not formed with in the such mode of Fig. 9 B of flange 3, by the stress bang path of an expression, be configured to flat board, can not fully guarantee flexural rigidity and bend yield strength noted.When flexural rigidity and bend yield strength noted are when lower, the stress that should transmit to bridging portion 31 is expended in the bending deflection of architrave portion 32, significantly impaired to the stress transmission of bridging portion 31.In this case, in order to ensure for suppressing the diastrophic above-mentioned stress bang path of architrave portion 32, and produce the needs of the rigidity of further reinforced bulkhead edge 32, manufacture workload and can become excessive.
Figure 10 represents the situation (situation of the present embodiment shown in Fig. 9 A) that architrave portion 32 comprises flange 3 and under the situation (situation of the comparative example shown in Fig. 9 B) that does not comprise flange 3, the ratio between the theoretical value of the amount of power loss that the theoretical value of each rigidity of architrave portion 32 (flexural rigidity, torsional rigid) and the elastic bending deflection of architrave portion 32 cause.The longitudinal axis represents this ratio, and transverse axis represents that the flange width ho of architrave portion 32 is divided by the value obtaining apart from s of leaving of architrave portion 32.Figure 10 represents to make to leave certain and make flange width ho be changed to result when multiple apart from s.The value of the transverse axis of Figure 10 is 0 situation, represents the non-lipped situation of architrave portion 32, and the longitudinal axis is (=1) using it as reference value.
Known according to Figure 10, the flange width ho of architrave portion 32 is larger, and the elastic bending rigidity of architrave portion 32 and elastic torsion rigidity all become larger.Thus, the resiliently deformable of architrave portion 32 can be suppressed, stable stress transmission can be carried out.In addition, by suppressing elastic bending deflection and the elastic torsion of architrave portion 32, be out of shape, can make thus concentration of plastic deformation in damper portion 25.As a result, can carry out efficiently the power absorption of damper portion 25.As shown in figure 10, for example the flange width ho by architrave portion 32 is set to 1.5 times apart from s that leave of architrave portion 32, and the loss amount of the power absorption that the elastic bending deflection due to this architrave portion 32 can be produced thus reduces by 40% left and right.
The flange width ho of architrave portion 32 is larger, and the flexural rigidity of architrave portion 32 and torsional rigid are larger, links with the energy absorption of ironware 1 and also more improves.On the other hand, for architrave portion 32 being installed to the lip part 102 of U-steel 169, and in result, limited the width ho of flange 3, when further considering as damper by the Economy of steel plate, if 1.5 ~ 2.0 times apart from s that leave that flange width ho is set as to architrave portion 32, can realize stable stress transmission.
In the link of present embodiment that possesses above-mentioned architrave portion 32, with in ironware 1, by the architrave portion 32 with flange 3 being set at damper in steel plate, can take into account power absorption and answer force transfer mechanism by a steel plate thus.As a result, can reduce manufacture workload, the cost of ironware 1 for this link, and can improve flexural rigidity and the torsional rigid of architrave portion 32, can also increase and link by the amount of energy of ironware 1 own.
And, form damper portion 26, bridging portion 31, the architrave portion 32 of ironware 1 for the link of present embodiment, all a steel plate is processed and is configured, not by respectively independently unit engage afterwards.Therefore, do not need each parts to engage or weld, the burden that can realize manufacture workload alleviates, the inhibition of cost of material.
In addition, in the present embodiment, each end of the width direction B of slit 21,22, must leave interval s from flange 3.Thus, can improve as the rigidity linking with ironware 1, below, for this rigidity, improve and verify, therefore describe.
Figure 11 A and 11B represent the test body for the effect that has or not interval s (2X of sandwiched portion) to bring is verified.Figure 11 A indicates that, without the test body 121 between shear zone, Figure 11 B indicates the test body 122 between shear zone.For these test bodies 121,122, carried out controlling its two ends, left and right and the test of E direction load repeated load in figure.As a result, on each test body 121,122, produce shearing stress and the moment of flexure as shown in Figure 11 A, Figure 11 B.
Then, for this load repeated load respectively test body 121,122, measured respectively initial rigidity.According to the amount of deformation δ to E direction in figure of test body 121,122
dand the relation between P/Py, obtains this initial rigidity.According to the load p of actual loading on these test bodies 121,122 and the yield load Py of this test body 121,122, obtain this P/Py.
Figure 12 represents to have the amount of deformation δ of the test body 122 of interval s
d(mm) chart that is the longitudinal axis for transverse axis, the P/Py of take.Hence one can see that, and P/Py is change within surpassing ± 1.0 scope, and amount of deformation δ
dbe 7mm left and right to the maximum.In addition, known according to this Figure 12, depict the hysteresis loop that area is larger, obtain larger hysteresis decay.According to the tendency of this Figure 12, and according to the initial angle of elevation of hysteresis loop, obtain initial rigidity (kN/mm).
The result of obtaining initial rigidity based on this method, the initial rigidity that there is no the test body 121 of interval s is 37.5 (kN/mm), on the other hand, the initial rigidity that has the test body 122 of interval s is 75.0 (kN/mm).That is, confirmed following situation: have the initial rigidity of the test body 122 of interval s not compare with there is no the test body 121 of interval s, risen 2 times.Therefore,, by interval s is set, can further improve the rigidity linking with ironware 1.
[the second mode of execution]
Figure 13 means the stereogram of the detailed structure of ironware 301 for the link of second embodiment of the invention.In the following description, centered by the difference with above-mentioned the first mode of execution, describe, for other identical constituting components, use same-sign and the description thereof will be omitted.
The link of present embodiment with ironware 301 is, with respect to the shape of a pair of slit pore 22 of above-mentioned the first mode of execution, a part is different.That is, as shown in figure 13, in the slit pore 22A of present embodiment, at above-mentioned edge 22a1, do not form raised part 22a4, the central 22A4 of edge 22a1 comes to a point completely.In addition, edge 22a2 does not form smooth above-mentioned front end 22a3 yet, and the central 22A3 of edge 22a2 comes to a point completely.
The difference of the slit pore 22A of present embodiment and the slit pore 22 of above-mentioned the first mode of execution is described with reference to Figure 14.In addition, Figure 14 (a) represents the slit pore 22 of above-mentioned the first mode of execution, and Figure 14 (b) represents the slit pore 22A of present embodiment.
In the situation that the slit pore 22 shown in Figure 14 (a), can access being welded and fixed reliably and guaranteeing significantly cross-sectional length d of the second linking department 28
0and the strengthening of the rigidity of the bridging portion 31 realizing.
On the other hand, in the situation that the slit pore 22A shown in Figure 14 (b), raised part 22a4 and smooth above-mentioned front end 22a3 are not corresponding with having, and can guarantee the amount of deformation of each damper portion 26 largelyr.; in the situation that the link of above-mentioned the first mode of execution is made as to St2 with the link that the amount of deformation of ironware 1 is made as St1, present embodiment with the amount of deformation of ironware 301; St2>St1, links and can bring into play higher energy absorption with ironware 301.In addition, the in the situation that of present embodiment, as long as replace possessing raised part 22a4, be bolted to carry out the fixing of the second linking department 28, can not produce the problem of weldability.
[the 3rd mode of execution]
Figure 15 is the local amplification stereogram of the flange 3A of ironware 401 for the link of third embodiment of the invention.In the following description, centered by the difference with above-mentioned the first mode of execution, describe, for other identical constituting components, use same-sign and the description thereof will be omitted.
In the present embodiment, as flange 3A, be formed with the reflex part 39 that its front end is turned back to inboard.By forming this reflex part 39, can increase the essence thickness of slab of flange 3A.As a result, can further improve the flexural rigidity of architrave portion 32.In addition,, by forming this reflex part 39, toppling in the time of can also preventing from screwing togather self-drilling screw 40, can also improve application property.More specifically, to connect the external lateral portion of flange 3A and reflex part 39 both sides' mode, be pre-formed interior threaded hole 3a.And, by flange 3A to object parts fixedly time, to the both sides of two interior threaded hole 3a, screw togather self-drilling screw 40, self-drilling screw 40, by 2 supports on its long side direction, therefore can prevent toppling over of self-drilling screw 40 thus.
[the 4th mode of execution]
Figure 16 is the stereogram of ironware 501 for the link of four embodiment of the invention.In the following description, centered by the difference with above-mentioned the first mode of execution, describe, for other identical constituting components, use same-sign and the description thereof will be omitted.
The link of present embodiment is replace application U-steel, and as shown in Figure 16, adopting cross section to be rectangular-shaped shaped steel with ironware 501.; the link of present embodiment with ironware 501 is; have the link of a pair of explanation in the above-described first embodiment with ironware 1 so that the shape that these links connect by the mode that dock each other the edge of each flange 3 of ironware 1; in the situation that be to observe in the cross section that long side direction A is vertical with the direction of relative displacement, become rectangular-shaped shaped steel.
According to present embodiment, can access the action effect same with above-mentioned the first mode of execution.And, according to present embodiment, replace installing at twice the situation of ironwares 1 for two links, and can ironware 501 for link of once mounting, so application property is good.And, never needing to carry out two links and consider by the contraposition this point between ironware 1, application property is also good.
Furthermore, with respect to the torsion of the object parts with the second linking department 28 links, can bring into play higher resistivity.
Material as the link illustrating in the first ~ four mode of execution described above with ironware 1,301,401,501, preferably adopts so-called low-alloy steel product (TRIP steel).This TRIP steel is following low-alloy steel product: the austenite phase of residual high carbon concentration intentionally in the steel when normal temperature, by austenite, carry out mutually martensite phase transformation, performance presents the phase change induction plasticity effect (TRIP effect) of high strength and large elongation thus.As this TRIP steel, steel that for example can be below illustration: manufacture by hot rolling, its chemical composition is that, all with % by weight, C is 10.5 * 10
-2, Si is 139.3 * 10
-2, Mn is 137 * 10
-2, P is 9 * 10
-3, S is 1 * 10
-3, Ni is 1 * 10
-3, Cr is 20 * 10
-3, in addition, the principal phase of crystal texture is that ferrite, second-phase are formed by bainite and retained austenite.Owing to being low-alloy, weldability is also good, and the % by weight of the element such as Cr, Ni, the Mn of high price is also lower, therefore can make more at an easy rate as the ironware 1,301,401,501 of link with the building damper of phase change induction plasticity.
As shown in figure 17, the yield strength of TRIP steel is 430N/mm
2above, yield strength and elongation amasss as 130N/mm
2above.The long-pending threshold value of this yield strength and yield strength and elongation, all use the data (number of samples n=51749) with the middle and high yield strength of steel plate and the best high yield strength steel of energy absorption at building shock damper in the past, and be set as surpassing the value of 95.5% confidence upper limit value of these data.Building is in the past steel plate (high yield strength steel, extremely low yield point steel, Low Yield Point Steel) for shock damper, can not meet above-mentioned two threshold values simultaneously, therefore compare with steel plate with existing building shock damper, can bring into play high strength and macro-energy uptake.
That is, link and compare with shearing damp device in the past with ironware 1,301,401,501, further miniaturization (reduction of steel plate amount), further energization uptake.
In addition, compare with the austenite stainless steel rod in the past of developing, have TRIP effect as the energy absorbing member in shock-proof device, for high-yield strength and be low-alloy, and also do not worry and carbon steel between galvanic corrosion, therefore also contribute to miniaturization, the manufacture cost of power absorption portion 49 significantly to cut down and corrosion resistance improves.
In addition, in tensile strength, be 590N/mm
2in above TRIP steel plate (number of samples n=495), the mean value of yield strength is 478N/mm
2, yield strength is 175N/mm with the long-pending mean value of elongation
2.68.3% confidence lower limit value of the statistics of this TRIP steel is that yield strength is 463N/mm
2, yield strength is amassed as 164N/mm with elongation
2, in addition, 95.5% confidence lower limit value is that yield strength is 448N/mm
2, yield strength is amassed as 152N/mm with elongation
2, and 99.7% confidence lower limit value is that yield strength is 433N/mm
2, yield strength is amassed as 141N/mm with elongation
2.Therefore for tensile strength, be, 590N/mm
2above, there is the TRIP steel of phase change induction plasticity, to steel implement to process especially, operation, just can meet preferred important document, be that yield strength is 430N/mm
2above and the amassing as 130N/mm of yield strength and elongation
2above.
For example, as shown in figure 18, link with ironware 1 and there is yield strength (stress) and extend (strain) characteristic larger than high yield strength steel.
As described above, as the raw material linking with ironware 1,301,401,501, in use, there is phase change induction plasticity and yield strength is 430N/mm
2above 700N/mm
2below and the amassing as 130N/mm of this yield strength and elongation
2above 250N/mm
2in the situation of following TRIP steel, can make the amount of energy of per unit volume be greater than extremely low yield point steel, high yield strength steel in the past, can improve energy absorption.And, because use has the TRIP steel of self-inflicted injury muting function, so can improve resistance to be full of cracks generation characteristic and resistance to be full of cracks developing characteristics, and can improve weldability.
In addition, as above-mentioned yield strength, more preferably 440N/mm
2above 650N/mm
2below, most preferably be 450N/mm
2above 600N/mm
2below.
Equally, as above-mentioned yield strength and elongation are, amass, more preferably 145N/mm
2above 240N/mm
2below, most preferably be 160N/mm
2above 230N/mm
2below.
The CLV ceiling limit value of the above-mentioned yield strength of TRIP steel is made as to 700N/mm
2, and will be made as 250N/mm to yield strength and the long-pending relevant CLV ceiling limit value of elongation
2, described in it be the reasons are as follows.That is, in the situation that use the TRIP steel that surpasses these CLV ceiling limit value, the deviation of characteristic increases, and becomes and manufactures difficulty.And, being difficult to maintain link and using ironware and the strength balance between the object parts of ironware for this link is installed, result cannot be carried out suitable structure design.According to this reason, stipulated above-mentioned CLV ceiling limit value.
And, in the situation that link on the surface with ironware 1,301,401,501, formed the reinforced layer based on galvanizing by dipping or electrogalvanizing or electro-coating, can increase yield ratio by age hardening, and the yield strength that can suppress after surrender rises.And, can also obtain extraly anticorrosion ability, therefore can access the more long lifetime.In addition, can process etc. and to improve yield strength by plating, therefore can when maintaining yield strength same when plate processing, reduce steel plate use amount, can realize further miniaturization, lightweight.
Embodiment
Below, various embodiments of the present invention are described.
[embodiment 1]
In the present embodiment 1, the shape and the impact of material on amount of energy generation that link with ironware have been investigated.That is, prepared: (a) as shown in figure 19, there is shape and the comparative example using non-TRIP steel (precipitation strength steel) as its raw material without the above-mentioned sandwiched 2X of portion, link accessory 500; And (b) be applied in the present invention's structure and the present embodiment using TRIP steel as its raw material, the i.e. above-mentioned link accessory 1 having illustrated in Fig. 1.
TRIP steel as the raw material of the link accessory 1 of the present embodiment is have phase change induction plasticity, and yield strength to be 430N/mm
2above 700N/mm
2below, and the amassing as 130N/mm of this yield strength and elongation
2above 250N/mm
2below.In addition, grade and above-described embodiment of the tensile strength (yield strength) of link accessory 500 are as a comparative example roughly the same, but yield strength and the long-pending embodiment 1 that is less than of elongation.
Figure 20 (a) and Figure 20 (b) represent the result that these comparative examples and the present embodiment have been carried out respectively repeatedly increasing progressively test.In addition, Figure 20 (a) represents the test result of comparative example, and Figure 20 (b) represents the test result of the present embodiment.
As contrast Figure 20 (a) and Figure 20 (b) is known, and in the present embodiment shown in Figure 20 (b), load-deflection curve is depicted the hysteresis loop that area is larger, and energy absorption improves.In addition, in the situation that the gross area of the ring of repeatedly describing is calculated as to cumlative energy uptake, confirmed following situation: the link accessory 1 of the present embodiment is compared with the link accessory 500 of comparative example, and rigidity is increased to 2.0 times, and amount of energy is increased to 4.1 times.As the shape and the effect that multiplies each other of using TRIP steel as the combination of raw material based on linking accessory 1, and obtain this significantly performance raising.
[embodiment 2]
In the present embodiment 2, investigated the impact of above-mentioned reinforced layer on amount of energy.That is, prepared: the above-mentioned link accessory 1 having illustrated in Fig. 1 is implemented to hot dipping is processed and the present embodiment of forming above-mentioned reinforced layer; With on the above-mentioned link accessory 1 having illustrated, do not form the comparative example of above-mentioned reinforced layer in Fig. 1.
The result that Figure 21 represents these comparative examples and the present embodiment to have carried out respectively low cycle fatigue test is load-deflection curve.In this Figure 21, the resume of grey represent the present embodiment, and the resume of black represent comparative example.
The result of low cycle fatigue test, has confirmed following situation: no matter implemented which kind of processing that galvanizing by dipping processing, electroplating processes, electro-coating are processed, the value of yield strength, yield ratio (YR), yield strength * elongation, is all greater than comparative example.Particularly, confirmed following situation: the link accessory 1 of the present embodiment is compared with comparative example, amount of energy increases to 1.4 times.As based on link accessory 1 shape, use TRIP steel as raw material and the effect that multiplies each other that this three's of reinforced layer combination is set, and obtain this further performance, improve.
In above each mode of execution, recorded for implementing best formation of the present invention, method etc., but the present invention is not only defined in this.That is, the present invention is not within departing from the scope of technological thought and object, and those skilled in the art can, to each above-mentioned mode of execution, implement various distortion in shape, material, quantity and other detailed formations.
Industry utilizability
According to the present invention, a kind of link ironware can be provided, can come the outer rigidity of raising face, flexural rigidity and EAC by extremely simple structure.
The explanation of symbol:
1,301,401,501 link ironwares
2 webs
2X sandwiched portion
3,3A flange
21,22,22A slit pore
25 damping fins
26 damper portions
28 second linking departments
31 bridging portions
32 architrave portions
57 self-drilling screws
91 stone bolt
92 steel pipes
105 nuts
169 U-steels