CN103526705B

CN103526705B - For dissipation energy with the guardrail safety system making vehicle impact slow down

Info

Publication number: CN103526705B
Application number: CN201310322992.5A
Authority: CN
Inventors: 阿卡姆·Y·阿布-欧戴施; 迪安·C·奥博森; 罗杰·P·比利格; D·兰斯·小布拉德; 尤金·C·布什
Original assignee: Texas A&M University System
Current assignee: Texas A&M University System
Priority date: 2008-05-05
Filing date: 2009-05-05
Publication date: 2016-01-06
Anticipated expiration: 2029-05-05
Also published as: CN102084065A; AU2015249112A1; EP2313560A1; AU2009244438C1; CN102084065B; DK2313560T3; KR20110004896A; CN103526705A; AU2009244438B2; MX339695B; CA2940944A1; CA2725225A1; HK1191073A1; IL231529A; IL209183A; IL209183A0; CA2940944C; WO2009137483A1; PL2313560T3; IL231529A0

Abstract

The present invention relates to for dissipation energy with the guardrail safety system making vehicle impact slow down.The terminal part of guardrail safety system comprises a terminal part for guardrail beam, and the terminal part of guardrail beam comprises upstream extremity and downstream.At the upstream extremity place of terminal part, the terminal part of guardrail beam is not from the first vertical high inclination being suitable for being redirected drift vehicle to subaerial second vertically highly.Supporting strut is installed with the contiguous highway of the mode be spaced apart from each other, and is connected to the terminal part of guardrail beam.Terminal supporting strut is installed at the upstream extremity place of most end terminal vicinity highway.The enemy carried out at vehicle is clashed into or in break-in knockout process, the connection that is resistant, tensioning between terminal supporting strut and guardrail beam is maintained.But in reverse knockout process, the connection that is resistant, tensioning between terminal supporting strut and guardrail beam is released.

Description

For dissipation energy with the guardrail safety system making vehicle impact slow down

The application is the divisional application based on the applying date is on May 5th, 2009, application number is 200980126179.2, denomination of invention is the application for a patent for invention of " for dissipation energy with the guardrail safety system making vehicle impact slow down ".

Technical field

The present invention relates generally to the safety measure (treatment) for W beam guardrail (W-beamguardrail); Particularly relate to the guardrail terminal of tensioning, this terminal is used in correct (end-on) or break-in (re-directive) clash into, the Impact energy of the automobile collided with the end of W beam guardrail being dissipated.

Background technology

All there are some harm along most of speedway, if automobile leaves speedway, these harm may have very large danger for driver.In order to reduce the seriousness of the accident caused because vehicle leaves speedway, be provided with guardrail.Guardrail is installed into and makes beam element be in tensioning state (intension) to offer help in the shock of break-in type.But, guardrail be installed into make these guardrails, do not become harm towards that end of the magnitude of traffic flow.Early stage guardrail does not have suitable terminal at end, and the vehicle of shock stings on guardrail, cause vehicle acutely to slow down and the situation of grievous injury occupant is unrare.In the case of some reports, guardrail directly pierces through in the crew department of vehicle, causes mortal injury to occupant.

After the problem recognizing suitable guardrail terminal, developed the Guardrail design using box beam and W beam, these beams allow the end of guardrail in landing ground be tapered (taper).These designs eliminate the effect of any lance formula.Although these end measures successfully eliminate the danger that vehicle is pierced in central collision, but find that these end measures are the mode work that is similar to inclined-plane, and vehicle may be caused to be dished out, make it to fly very Da I Member distance, may cause and topple.

In the process finding better end measure, develop the energy absorption end measure of the improvement for W beam guardrail element.Such as develop extruder (extruder) terminal, this terminal generally includes bending structure, and guardrail is squeezed into flat board by this structure, then it is bent around circular arc, and described circular arc facing away from vehicle impact.Exemplary extruder end product comprises the ET2000 provided by TrinityHighwayProducts ^tMand ET-PLUS ^tM.Other extruder end product comprises the SKT350 provided by RoadSystems, Inc. ^tMand FLEAT350 ^tM.

These all energy absorber systems all use cable the one W beam guardrail section to be connected to the first pillar in system.Cable provides tension force in guardrail beam, collides for the break-in carried out along the part of Len req in guardrail.Many cable slack pillars are developed to be used in these terminals.These cable slack pillars are intended to: when pillar along front (correct clash into) or reverse side direction is subject to clashing into time, cable anchor (anchor) is relaxed, and thus the tension recovery in system is got off.Enemy clash into and reverse type knockout process in, these systems can not remain in tensioning state.

Summary of the invention

The invention provides for freeway guardrail, the new end measure with improving.

According to a particular embodiment of the invention, a kind of end measure of guardrail safety system comprises the terminal part of guardrail beam, and this part comprises upstream extremity and downstream.At the upstream extremity place of the terminal part of guardrail beam, the terminal part of guardrail beam is not from the first vertical high inclination being suitable for being redirected drift vehicle to subaerial second vertically highly.Flattened section forms raceway groove, and the terminal part of guardrail beam is arranged through described raceway groove.The vertical size of raceway groove is larger at the upstream extremity place of flattened section at the downstream end ratio of flattened section.Crash panel is connected to flattened section, for engaging with vehicle impact in the end of guardrail beam.In correct knockout process, vehicle makes crash panel and flattened section longitudinally advance on downstream direction along guardrail.This advance of crash panel and the flattened section energy that dissipated slows down to make vehicle impact.Downstream part along with guardrail beam is forced in flattened section, and guardrail in the vertical direction is flattened.

The technological merit of specific embodiments of the invention comprises: Impact energy is dissipated by the compression of W beam guardrail element by the measure of guardrail end.Therefore, an advantage can be, this guardrail end measure is energy-absorbing.Another advantage can be, this end measure forces W beam guardrail element through plat structure, and guardrail is squeezed into comparatively smooth plate by this plat structure.Specifically, this guardrail end measure can by making a part for guardrail planarized, the Impact energy that dissipate vehicle and guardrail end collide.

Another advantage can be, the end of W beam guardrail element extends through plat structure, and attenuates to landing ground.W beam guardrail element can be fastened to ground with tensioning state.Providing the system element that between guardrail beam with terminal supporting strut, tensioning is connected can enable guardrail beam keep fastening after correct or break-in are clashed into.Like this, this system all can keep tensioning in the knockout process of two types.But another advantage can be, when system is subject to oppositely clashing near terminal, this tensioning state can unclamp.Vehicle unstability and excessive deceleration is prevented for oppositely clashing into the tensioning state unclamping guardrail element.

According to a particular embodiment of the invention, a kind of terminal part of guardrail safety system comprises the terminal part of guardrail beam, and the terminal part of guardrail beam comprises upstream extremity and downstream.At the upstream extremity place of terminal part, the terminal part of guardrail beam is not from the first vertical high inclination being suitable for being redirected drift vehicle to subaerial second vertically highly.Supporting strut is installed with the contiguous highway of the mode be spaced apart from each other, and is connected to the terminal part of guardrail beam.Terminal supporting strut is installed at the upstream extremity place of most end terminal vicinity highway.Terminal supporting strut is connected to the upstream extremity of the terminal part of guardrail beam by the connected mode of resistant, tensioning, described connected mode that is resistant, tensioning maintains tensioning state in the terminal part of guardrail beam.The enemy carried out at vehicle is clashed into or in break-in knockout process, the connection that is resistant, tensioning between terminal supporting strut and guardrail beam is maintained.But in reverse knockout process, the connection that is resistant, tensioning between terminal supporting strut and guardrail beam is released.

Those skilled in the art easily understand other technologies advantage from accompanying drawing below, manual and claim.In addition, although listed multiple concrete advantage above, various embodiment can comprise in these cited advantages whole, partly or not comprise.

Accompanying drawing explanation

Fig. 1 illustrates the top view of the exemplary guardrail safety system comprising some aspect of the present invention;

Fig. 2 illustrates the lateral view of the terminal part of the fence sytsem comprising some aspect of the present invention;

Fig. 3 illustrates according to a particular embodiment of the invention, the lateral view of the exemplary embodiment of end measure in the terminal part of fence sytsem;

Fig. 4 A and Fig. 4 B respectively illustrates lateral view and the outline drawing of the modified guardrail beam comprising some aspect of the present invention;

Fig. 5 A-5C illustrates according to a particular embodiment of the invention, is suitable for the exemplary reduction supporting strut be used in guardrail safety system;

Fig. 6 A-6C illustrates according to a particular embodiment of the invention, is suitable for the exemplary reduction supporting strut of another kind be used in guardrail safety system;

Fig. 7 A-7C illustrates according to a particular embodiment of the invention, is suitable for the exemplary unmodified supporting strut be used in guardrail safety system;

Fig. 8 A and Fig. 8 B illustrates according to a particular embodiment of the invention, is suitable for the exemplary embodiment of the terminal supporting strut be used in guardrail safety system;

Fig. 9 A-9C illustrates according to a particular embodiment of the invention, for guardrail beam being connected to the various elements of the resistant tensioning connected mode of terminal supporting strut;

Figure 10 A and Figure 10 B illustrates according to a particular embodiment of the invention, for guardrail beam being connected to the exemplary resistant tensioning connected mode of terminal supporting strut;

Figure 11 A and Figure 11 B illustrates according to a particular embodiment of the invention, is suitable for the exemplary pole be used in guardrail safety system;

Figure 12 illustrates according to a particular embodiment of the invention, for guardrail beam being connected to the alternative embodiment of the resistant tensioning connected mode of terminal supporting strut.

Detailed description of the invention

It is unsafe that the measure of existing guardrail end has been proved to be for some impact conditions that speedway occurs, comparatively responsive for installation details, and/or very expensive.But end measure described below is the safety measure for W beam guardrail end, and it provides higher performance level in wider impact conditions, reduce end measure cost and the injures and deaths number relevant with guardrail terminal accident.Enemy clash into and break-in types of impacts process in, described system all maintains tension force in guardrail beam.But when near terminal, edge is oppositely subject to clashing into this system.Grappling (anchorage) system can relax, to prevent vehicle unstability or excessive deceleration.

Fig. 1 illustrates the guardrail safety system 100 comprising some aspect of the present invention.Fence sytsem 100 can be arranged near Highway to protect vehicle, driver and passenger from various impairment and harm, and prevents vehicle from traffic accident or other harm conditioning processes, leaving highway.The fence sytsem comprising these aspects of the present invention maybe may be able to face in any path of vehicular traffic in isolation strip or curb at speedway, highway.

Fence sytsem 100 comprises guardrail beam 102 and supporting strut 104, these supporting struts along highway by place for guardrail beam 102 grappling.In a particular embodiment, guardrail beam 102 can comprise multiple No. 12 (12-gauge) W beam hurdle elements, and the length of this element is in about 12.5 feet or 25 feet of magnitudes.These guardrail parts can be installed in the height of about 27 to 31 inches of magnitudes, the intermediate span place of fastener between supporting strut 14 of beam.Specifically, the terminal of guardrail beam 102 and guardrail beam 102 illustrates in more detail in Fig. 4 A, Fig. 4 B, and describes hereinafter.

Guardrail beam 102 is attached to supporting strut 104 by connector, these connectors can comprise the sunk screw of fluting in a particular embodiment, and such as 16mm (5/8 inch) diameter is multiplied by the machine screw of rising as high as the banks of 38mm (1 and 1/2 inch) length.Larger sized guardrail nut can be used at the back side of supporting strut 104.Supporting strut can embed in ground, in cement ground or in metal slot.Supporting strut 104 can be manufactured by any combination of timber, metal, plastics, composite material or these or other suitable material.Also can expect, each supporting strut 104 in fence sytsem 100 not necessarily by identical material manufacture or will comprise identical architectural feature.In addition, the cross section of supporting strut 104 can be the arbitrary shape being designed to be suitable for supporting guardrail beam 102 in the mode that can relax.These cross sectional shapes can include but not limited to square, rectangle, circle, ellipse, trapezoidal, solid, hollow, closed or open wide.

Fence sytsem 100 is for clashing into or preventing the vehicle of drift (errant) from leaving highway during other harm states.In many cases, guardrail 100 is installed between speedway and the remarkable harm (such as another highway, bridge, cliff etc.) for vehicle.Therefore, fence sytsem 100 should be designed to tolerate the remarkable shock next from the direction with highway less perpendicular and lost efficacy hardly.This intensity makes fence sytsem 100 can withstand shock, and is still redirected vehicle, makes it again substantially along highway direction running.

But test and experiment show constantly: in fact fence sytsem may introduce other harm for highway and peripheral region.Especially true for following situation: near the terminal part of fence sytsem, along striking fence sytsem with the direction of highway general parallel orientation.Such as, if fence sytsem is rigidly fixed to position in impact event, then may the vehicle of drift, its driver and passenger be caused serious injury and be destroyed.Therefore, many trials have been made to make this additional risk little as far as possible.These methods comprise the following terminal part of use substantially: these terminal parts are upwards tapered from ground, and to make the shock of central collision effectively reduce, and the effect that generation is similar to inclined-plane flies out in impact event to make vehicle.Additive method comprises U.S. Patent No. 6, disengaged cable terminations (BCT) disclosed in 398,192 (" ' 192 patent "), vehicle decay terminal (VAT), the measure of SENTRE end, disengaged end (BET) and disengaged supporting strut.Many this kind of terminals, support member, end measure etc. can have been bought from different tissues.Its example comprises the HBA pillar provided by ExodyneTechnologies and TrinityIndustries, and the disengaging number supporting strut structurally similar with the pillar that describes in the patent of ' 192.

Referring again to Fig. 1 and Fig. 2, fence sytsem 100 comprises a terminal post 106 and seven supporting struts 104.This structure together defines the terminal part 108 of fence sytsem 100.As shown in the figure, terminal part 108 is used as the end for conventional guard rail assembly 100 in an advantageous embodiment.

Although Fig. 1 illustrates some sizes and show a kind of exemplary embodiment, it should be understood that these sizes of fence sytsem 100 can change according to the character of the roadside harm that will block.As shown in the figure, each terminal part 108 has the length of about 35 feet of magnitudes.But the size of terminal part 108 can change as required.In addition, the Len req part of this system can have any convenient length required by Highway Conditions.

As Fig. 1 illustrates best, terminal part 108 can be parallel to highway and install, or departs from certain angle from highway and install.In addition, although the terminal part 108 of this guardrail safety system end can abduction, in certain embodiments, the guardrail part 108 at this system opposite ends place can not abduction.Such as, in the embodiment shown in fig. 1, upstream end part 108 is abductions, and downstream endpoint part 108 not abduction.Specifically, upstream end part 108 in mode linear substantially from highway abduction, and downstream endpoint part 108 keep be substantially parallel to highway.In other embodiments, two terminal parts 108 can all abduction or not abduction in a similar manner.It will also be appreciated that in addition and other are configured to terminal part 108.Such as, the one or both in terminal part 108 can be mounted to parabolic manner from highway abduction.Parabola abduction can be realized by following manner: along with terminal part upstream advances, and the skew of each supporting strut increases in the mode of parabola progression substantially.When comprising this feature, one or more terminal part 108 is positioned to the mode departed from from highway abduction or inclination, that side contrary to highway of this guardrail can be moved to by the vehicle being convenient to make generation clash into when advancing, allowing terminal part 108 execution control function.

In the specific embodiment of terminal part 108 abduction in a linear fashion, terminal part 108 can go back from the nonterminal part abduction of guardrail with the angle of about 6 to 7 degree.In a kind of specific embodiment, when the supporting strut 104 of terminal part 108 is opened with the intervals of about 75 inches, the most downstream pillar 104 of terminal part 108 can from the tangent offset of the nonterminal part of guardrail about 9 inches.In this embodiment, the upstream termination towards terminal part 108 advances, and following four continuous print supporting struts 104 can from the tangent offset 19,29.25,39 and 48 inches of the nonterminal part of guardrail.In described this embodiment, terminal post 106 can be in immediately below guardrail beam 102, can from the tangent offset about 47 inches of the nonterminal part of guardrail.

As Fig. 2 illustrates better, terminal part 108 comprises end measure 110.End measure 110 comprises flattened section 112 and front shock plate 114.Specifically, end measure 110 and flattened section 112 are installed on the first pillar 104 by securing member (such as screw).The object of end measure 110 is that the Impact energy of vehicle is dissipated, and does not produce unsafe conditions, and these unsafe conditionss such as cause vehicle to topple or make guardrail beam 102 can sting the crew department of vehicle or vehicle as lance.

Guardrail beam 102 flow in entrance 116 in the downstream of flattened section 112.Guardrail beam 102 is arranged in flattened section 112, and the length of flattened section 112 is extended.Guardrail beam 102 leaves outlet 118 at the upstream extremity of flattened section 112.As described in detail hereinafter with reference to Fig. 3, the size of flattened section 112 makes the terminal part of guardrail beam 102 be tapered earthward.The part in the vertical direction that guardrail beam 102 leaves outlet 118 is subject to planarized, make the terminal part of guardrail beam 102 be similar to four dull and stereotyped stacking.

The terminal of guardrail beam 102 is fastened to ground by terminal post 106, and makes guardrail beam 102 be in tensioning state.Describe in more detail below with reference to Fig. 8 A, Fig. 8 B and Figure 10 A, Figure 10 B, guardrail beam 102 being connected to terminal post 106 makes guardrail beam 102 after the enemy of the vehicle leaving highway is clashed into or break-in is clashed into, to keep being fastened to terminal post 106 with tensioning state.But make when near terminal, edge is oppositely subject to clashing into this system the influential parts of connection of this tensioning mode, the tension force in guardrail beam 102 can be relaxed.The tension recovery in guardrail element is made to prevent vehicle unstability and excessive deceleration for oppositely clashing into.

Fig. 3 illustrate in more detail the exemplary embodiment of end measure 110.As mentioned above, end measure 110 comprises flattened section 112 and front shock plate 114.Flattened section 112 and front shock plate 114 are connected to extruder 120.Extruder 120 surrounds the upstream portion of guardrail beam 102, and is made up of the U-shaped channel component 122 on top and the U-shaped channel component 124 of bottom, and these parts are tightened together in the mode be spaced apart from each other by bar band plate 126.

Vertical distance between channel floor 122 and 124 is suitable distance, is adapted so that guardrail beam 102 is inserted in the raceway groove produced by extruder 120.Such as, in a particular embodiment, when guardrail beam 102 comprises No. 12 W beam hurdle elements with about 12.25 inch vertical sizes, the distance between the top of channel component 122 and the bottom of raceway groove 124 can be about 14 inches.

Front shock plate 114 is fastened to the extruder 120 of end measure 110 by welding.In a particular embodiment, front shock plate 114 can in the vertical direction be elongated.Like this, front shock plate 114 all can extend above and below extruder 120, to make front shock plate 114 can either easily engage (engage) with the higher bumper of truck, SUV and other tall vehicle in the shock of positive manner, can engage with the lower position bumper compared with car again.Front shock plate 114 is also oriented to engage with vehicle frame or rocker (rockerpanel), charges into situation with what reduce vehicle when vehicle strikes the upstream extremity of end measure 110 in side mode.

In a particular embodiment, the flattened section 112 being installed to extruder 120 can be made up of four metal sheets.These four metal sheets can be cut and/or bend, and then weld together to form required structure.Or flattened section 112 also can be formed by more than four, or formed by being cut and being bent into the required piece of metal constructed.When assembling flattened section 112, flattened section 112 can form enclosed construction, and this structure contains the terminal part of guardrail 102.

In an illustrated embodiment, flattened section 112 comprises three sections.The most downstream part of flattened section 112 comprises throat 128.The vertical size of throat 128 is comparatively large in downstream, and along with it reduces close to the upstream extremity of end measure 110.Such as, in a particular embodiment, the vertical size of throat 128 can be at downstream about 14 inches wide and at upstream extremity about 4.5 inches wide.The horizontal length of throat 128 can within the scope of about 11 to 13 inches.

In a particular embodiment, the gradient of lower limb 132 can be greater than top edge 130.The gradient of lower limb 132 is increased to contribute to making guardrail beam 102 planarized in knockout process.Such as, in a particular embodiment, top edge 130 can with respect to the horizontal plane be inclined upwardly with the angle of about 11 degree, and lower limb 132 can be with respect to the horizontal plane downward-sloping with the angle of about 13 degree.In other examples, top edge 130 can be substantially identical with the gradient of lower limb 132.Like this, in a particular embodiment, top edge 130 and lower limb 132 can be mirror one another.In other embodiments, top edge 130 can be aimed at horizontal plane with the one in lower limb 132 (parallel with highway substantially), and the another one in top edge 130 and lower limb 132 is respectively to upper or downward-sloping.

Mid portion 134 extends from the upstream extremity of throat 128, and towards ground inclination.Specifically, mid portion 134 be configured to guardrail beam 102 from be suitable for being redirected vehicle impact, the height (being 31 inches a kind of specific embodiment) that is above the ground level level is transitioned into subaerial height.Like this, mid portion 134 extends to upstream extremity roughly ground level from the vertical distance that downstream end is associated with throat 128.In a particular embodiment, when the horizontal length of mid portion 134 is about 18.75 inches, mid portion can with respect to the horizontal plane with the angular slope of roughly 38 degree.

Mid portion 134 additionally provides raceway groove, and the terminal part of guardrail beam 102 is arranged through this raceway groove.In a particular embodiment, the vertical size of the raceway groove in mid portion 134 can be about 4.5 inches (being similar to the width of throat 128 at upstream extremity place).The size of the raceway groove in mid portion 134 can keep less constant, makes the vertical size of the raceway groove in mid portion 134 substantially identical at upstream extremity place with the vertical size of the raceway groove in mid portion 134 in downstream end.

The Part III of flattened section 112 comprises exit portion 136.Exit portion 136 extends from the upstream extremity of mid portion 134.Exit portion 136 is arranged in Near Ground, and aims at substantially with ground.Exit portion 136 also forms raceway groove, and the terminal of guardrail beam 102 leaves flattened section 112 through this raceway groove.In a particular embodiment, the vertical size of the raceway groove in exit portion 136 can be about 4.5 inches (similar with the vertical size of raceway groove in mid portion 134).The size of the raceway groove in exit portion 136 can keep less constant, makes the vertical size of the downstream end raceway groove of exit portion 136 substantially identical with the vertical size of the upstream extremity place raceway groove of exit portion 136.In a particular embodiment, the horizontal length of exit portion 136 can be about 5-7 inch.

As above as described in composition graphs 2, guardrail beam 102 is arranged in flattened section 112 and also extends through its whole length.Specifically, guardrail beam is sent in entrance 116 in the downstream end of flattened section 112.Guardrail beam 102 crosses over the length of flattened section 112, and leaves outlet 118 at the upstream extremity place of flattened section 112.Like this, the terminal of W beam guardrail element extends through this plat structure.Mid portion 134 makes guardrail beam 102 in the length of flattened section 112 gradually to landing ground transition in updrift side towards the slope on ground.After leaving outlet 118, guardrail beam 102 is secured to the terminal post 106 being in ground level.

In the head on collision or inclination head on collision process of vehicle and front shock plate 114, end measure 110 can be shifted at downstream direction, and the downstream part of guardrail beam 102 can be forced in the end measure 110 that displacement occurs.In such collision process, extruder 120 is used as guide, is directed in flattened section 112 by guardrail beam.Extruder 120 comprises guide 138, these guides 138 prevent in collision process along with extruder 120 along the length motion of guardrail beam 102 the end scraping W beam guardrail element by extruder 120.These guides 138 can adapt to any irregular place in guardrail beam 102 or bulge, to guarantee that guardrail beam 102 is sent in flattened section 112 rightly.

To move along guardrail beam 102 along with end measure 110 and the downstream part of guardrail beam 102 is forced into flattened section 112, guardrail beam 102 is flattened at vertical direction.Guardrail beam 102, the various piece left from the outlet 118 of flattened section 112 is flattened, and to become the plate looking like four vertical stackings such.Such as, when the vertical size of guardrail beam 102 be about 12.25 inches, the throat 134 of flattened section 112 be about 4.5 inches, the vertical size of the flattened section of guardrail beam 102 can be less than about 4.5 inches.Along with the generation of this planarization process, a large amount of energy is dissipated, and the vehicle that generation is clashed into slows down.

In order to help guardrail beam 102 original flat to be connected to terminal supporting strut 106, the terminal of guardrail beam 102 can be modified.Fig. 4 A and Fig. 4 B illustrates the guardrail beam 200 revised according to a kind of embodiment.As shown in Figure 4 A, guardrail beam 200 comprises slot area 202 at the upstream extremity of the terminal part of guardrail beam 200.In a particular embodiment, slot area 202 comprises series of grooves, and these grooves are longitudinally arranged in guardrail beam 200.In the guardrail test model constructed similarly with guardrail safety system 100, prove that use three grooves are effective.

Slot area 202 can start from terminal 203 place of guardrail beam 200, and the distance needed for extending to downstream.The horizontal length of slot area 202 can change according to the horizontal length of end measure 110.May wish that slot area 202 comprises the part guardrail beam 200 being connected to terminal post 106 and the part guardrail beam 200 crossing flattened section 112.Substantially, slot area 202 can extend to certain distance between first, second supporting strut 104 from the upstream end of guardrail beam 200.Such as when the size of the terminal part 108 of fence sytsem 100 and Fig. 1 illustrated dimension similar, slot area 202 can extend about 80-85 inch from the terminal of guardrail beam 200.

With reference to the cross section of W beam guardrail typical figure 4B Suo Shi, the layout of slot area 202 middle slot according to specific embodiment can be understood better.Low ebb 204 between upper and lower peak 206, and is formed at the intersection of inclination wet end 208.Edge member 210 is positioned at outside each peak 206 in the horizontal.For these grooves, layout very preferably presses close to each peak 206 and low ebb 204.Like this, in the embodiment shown in Fig. 4 A, the first and second grooves 212 are arranged in the first and second peaks 206.3rd groove 214 is arranged in low ebb 204.

The ability that the size of groove 212 and 214 should be enough to the terminal of guardrail beam 200 is flattened is strengthened.In an advantageous embodiment, the whole vertical size of each peak 204 and low ebb 204 can be removed.Have been found that the effective size in the vertical direction for groove 212 is about 0.5 inch.Have been found that the effective size in the vertical direction for groove 214 is about 0.75 inch.Like this, in a particular embodiment, groove 212 can have the width of 0.5 inch of magnitude and extend about 81-82 inch, groove 214 can have the width of more 0.75 inch of magnitude and extend about 81-82 inch.But these sizes provided are only example objects.Use any size can to groove 212 and 214, the ability making guardrail beam 200 in the whole terminal of guardrail beam 200 be flattened to the plate of four vertical stackings is strengthened.

Although guardrail beam 102 can comprise W beam hurdle element, can usually expect, shown guardrail beam 102 is only the example of operable beam in fence sytsem.The various piece of guardrail beam 102 or guardrail beam 102 can comprise traditional W beam guardrail, three ripple guardrails, box-girder, cable wire or be suitable for when colliding other structure members that the vehicle of drift is redirected.It will also be appreciated that, structure and the size of any said elements in fence sytsem 100 can change as required.

Get back to Fig. 1 and Fig. 2, at vehicle and the initial enemy of end measure 110 is clashed into and after the initial displacement of end measure 110 on downstream direction, the vehicle of shock and end measure 110 may connect with one or more supporting strut 104.Guardrail beam 102 can unclamp when being subject to clashing into and bending earthward by the supporting strut 104 clashed into when these supporting struts 104 are included in surrender (yielding) supporting strut that ground place is modified, steel.Like this, in certain embodiments, the supporting strut 104 clashed in collision process can be shifted, and they can not be worked the mischief to the vehicle occurring to clash into.Although guardrail beam 102 can unclamp from the supporting strut 104 clashed into, guardrail beam 102 part that downstream, shock place occurs can keep its initial position substantially relative to ground.In addition, due to enemy clash into or break-in knockout process in guardrail beam 102 remain connected to terminal post 106, so guardrail beam 102 remains in tensioning state.This expands the scope that guardrail safety system has acceptable energy.

When fence sytsem 100 in the Len req part at fence sytsem 100 is subject to break-in shock, the tension force in guardrail beam 102 also can keep in this way.Such as, when edge is left highway with the vehicle impact of the direction running of the downstream direction general parallel orientation of fence sytsem 100 and clashes into fence sytsem 100, any supporting strut 104 being subject to Vehicular impact can work when being subject to clashing into, and is unclamped by guardrail beam 102.The supporting strut 104 of amendment can bend earthward, and this supporting strut is shifted, and does not work the mischief to the vehicle clashed into.Owing to maintaining the tension force in fence sytsem 100, even if so at one or more supporting strut from after guardrail beam 102 unclamps, guardrail beam 102 also continues to work to be redirected back on highway by vehicle.

Fig. 5 A-5C, 6A-6C and 7A-7C illustrate the exemplary embodiment of the supporting strut that can be combined with the fence sytsem 100 of Fig. 1.Specifically, Fig. 5 A-5C illustrates exemplary reduction supporting strut, and this pillar can be used as the first supporting strut 500 (after terminal supporting strut 106) in the terminal part 108 of guardrail safety system 100.Fig. 6 A-6C illustrates exemplary reduction supporting strut 600, and this pillar can use in the whole terminal part 108 of guardrail safety system 100 and other parts.Fig. 7 A-7C illustrates standard circuit pillar 700, and this pillar can use in some part of guardrail safety system 100.Although Fig. 5 A-5C, 6A-6C and 7A-7C respectively illustrate three kinds of distinguishing embodiments, have employed identical label to identify parts public in these three kinds of embodiments.

As shown in the figure, supporting strut 500,600 and 700 comprises elongated continuous structure parts, and is the flange configuration of normal width respectively.Each supporting strut comprises two flanges 502, and these flanges are substantial parallel each other, and relative to each other spaced apart.Junction plate (web) 504 forms connection between flange 502.In a preferred embodiment, flange 502 comprises identical substantially screw 506 wherein and excision district 508 constructs.

For the wide flange shape being used as guardrail pillar, cross section is formed the shape being similar to letter " H " usually.This cross section has two major axis for bending." weak " axis is often referred to and extends through junction plate and vertical with these flanges central axis." by force " axis be often referred to perpendicular to junction plate and with the parallel plane central axis of flange.For the conventional mounting facility of guardrail, weak axis lateral connecting line and extending substantially.Strong axis extends along road substantially.

In the embodiment shown in Fig. 5 A-5C, 6A-6C and 7A-7C, wide flange is W6 × 8.5 of standard, and it is common to the supporting strut manufacture of guardrail installation.It is dark that the wide flange in W6 × 8.5 of standard can have six inches of nominal, and the weight of every foot is eight and half.In fact, an advantage of the invention is and existing standard device can be used for again manufacturing, revising and supporting strut 500 is installed, and mustn't revise significantly equipment.Those skilled in the art can expect, can use the wide flanged beam of many different sizes.Such as, this wide flange of wide flange that six inches of dark, per inch also can be used to weigh nine and half is called the wide flange in W6 × 9.But the wide flange of the wide flange in W6 × 9 and W6 × 8.5 is considered to equivalent in transaction.The meaning of term " the wide flange in W6 × 8.5 " and " the wide flange in W6 × 9 " refers to that those skilled in the art can be called overall dimension and the structure of the guardrail pillar of " W6 × 9 ".In addition, it will be understood by those skilled in the art that other titles for wide flange include but not limited to " I beam ", " H beam ", " W beam ", " S beam ", " M beam ", that is, can replace " beam " with term " shape ".

In a particular embodiment, supporting strut 500,600 and 700 has about 72 to 73 and length within the scope of 3/8 inch, and comprises top 510 and bottom 512.Top 510 and bottom 512 couple together by middle part 514.Top 510 comprises two screws 506, and they are suitable for holding connector to be arranged on this supporting strut by guardrail beam (such as guardrail beam 102).Bottom 512 is suitable for being arranged on slope, road (grade) below, as a part for guardrail support system.

Screw 506 comprises standard construction, and widely used guardrail beam can be arranged on corresponding supporting strut by this structure.Substantially, screw 506 is aimed at the center of guardrail beam, and the center of guardrail beam is maintained about 30 inches of more than ground.But within the scope of the invention, the number of screw 506, size, position and structure can be modified to a great extent.

Supporting strut 500 and 600 is modified to include " weak " axis W and the axis S compared with " by force " separately.Supporting strut 500 and 600 is installed along road under normal circumstances, makes weak axis W be essentially perpendicular to magnitude of traffic flow direction, and strong axis S is substantially parallel to magnitude of traffic flow direction.Therefore, supporting strut 500 and 600 usually can tolerate the remarkable shock (such as with the shock of the automobile of running at high speed) for strong axis S and can not obviously lose efficacy.But supporting strut 500 and 600 is intentionally designed into and makes in response to the shock for weak axis W and more easily lost efficacy.In other words, supporting strut 500 and 600 shows enough intensity in the horizontal, and shows enough low intensity in the vertical.Therefore, if vehicle strikes end measure 110 in " end " mode, then supporting strut 500 and 600 is by area failures (such as warpage), enables vehicle along with it slows down to the shock of follow-up supporting strut simultaneously.But if vehicle also angularly impacts fence sytsem 100 with it along the surface of guardrail beam 102, then supporting strut 500 and 600 will provide enough resistances (intensity), be redirected to vehicle along the path substantial parallel with guardrail beam 102.

The mid portion 514 of supporting strut 500 and 600 comprises two excision districts 508, and these excision districts are constructed such that supporting strut weakens further about weak axis W, thus more easily loses efficacy due to vehicle shock in the direction.Excision district 508 is positioned at mid portion 514, weakens about the weak axis W that (when mounted) is contiguous with ground to make supporting strut.The supporting strut that can adapt to so roughly at ground place lost efficacy, and supporting strut 500 and 600 upwards " can be folded " from failpoint and go back.Because bottom 512 is at below ground, so in knockout process, expect that the bottom 512 of ground or supporting strut can not be obviously crooked.

In an illustrated embodiment, due to excision, district 508 is created intentionally for artistic reasons at roughly ground place, and the center of screw 506 is created intentionally for artistic reasons 30 inches of places more than ground, so screw 506 results from excise 30 inches of places above district 508.It will be understood by those skilled in the art that within the scope of the invention, screw, the excision size in district, structure, position and number and their relations each other can be revised to a great extent.Within the scope of the invention, these supporting struts and their respective top, bottom and mid portion overall length also can revise to a great extent.Such as, in other embodiments, excise district 508 can result from below ground or top.The degree of depth in excision district 508 below ground should be no more than following amounts: described amount can hinder supporting strut to lose efficacy near the position in excision district 508 or the position in excision district 508.At certain depth below ground, the bottom 512 of supporting strut can be enhanced to and can not allow this degree occurred that lost efficacy by soil around (or other) material.

The height excising district 508 square on the ground should not exceed following point: at described some place, supporting strut will lose efficacy at excision place of district 508, and side stays " broken end " on the ground, this " broken end " may tangle vehicle and otherwise cause excessively injury and/or excess destruction.For the redirected effect of the fence sytsem at supporting strut work place, this broken end may be harmful.

The vertical size in excision district 508 limits according to the horizontal dimension in excision district 508.Such as, the ratio of the vertical size in any specific excision district can be equal to or less than three times of horizontal dimension.Or this ratio can be limited in the twice of horizontal dimension.In an illustrated embodiment, this ratio is 1:1, because excision district 508 is the circular open in supporting strut substantially.The vertical size in excision district is less, and designer just more accurately can specify the vertical length of failpoint along supporting strut 500 and 600.

According to instruction of the present invention, for the designer of supporting strut 500 and 600, the structure in various excision district 508 can be had.Such as, excision district 508 can not be circular open, but comprises square, rectangle, triangle, ellipse, rhombus or in fact any other geometrical construction, and still obtains the part or all of advantage described in the application.

Within the scope of the invention, excise the horizontal direction of district 508 in flange 502 also can change significantly.In the embodiment shown in Fig. 5 A-5C and Fig. 6 A-6C, the position of center line be about an inch away from center line of flange 508 in excision district 508.But in alternative embodiments, the position in excision district 508 can from these edges more close to, or farther from these edges.In one embodiment, excision 508 can be constructed such that they extend to the edge of flange, thus there is disconnection in the material from edge.Like this, traditional drift can be adopted formed in edge the semicircle opening extending to flange edge.

Or, also can to adopt from the outward flange of flange and the sawing mode extended internally forms excision district 508.Like this, the weak axis along supporting strut is formed the starting point of possibility failpoint by sawing mode.Except sawing, similar structure also can comprise groove, and the longest yardstick in groove is horizontal-extending through flange.Such groove can start or end at the edge of flange, or is otherwise arranged in completely in flange material.

As mentioned above, Fig. 5 A-5C particularly illustrates the guardrail supporting strut 500 that can be used as the first supporting strut (after terminal supporting strut 106) in fence sytsem 100.After end measure (such as end measure 110) is covered guardrail safety system 100, supporting strut can be modified with support tip measure 110.Specifically, supporting strut 500 comprises additional screw 520 and 522, for end measure 110 is connected to supporting strut 500.In concrete illustrated embodiment, screw 520 and 522 is slightly less than screw 506 and excision district 508.But the size that it should be understood that provided screw 520 and 522 is example object, and can change that end measure 110 is connected to supporting strut 500 as required.Different from supporting strut 500, supporting strut 600 and 700 does not comprise screw 520 and 522, is therefore more suitable for being used in not carrying out in the part directly supported end measure 110 of fence sytsem 100.

Although describe above and illustrate the wide flange in W6 × 8.5 in the description, it will be appreciated by those skilled in the art that, can weaken the guardrail supporting strut of in fact any size as mentioned above.The several factors will considered when the size of supporting strut, weight and structure just determine the correct position excising district, to allow is allowing to surrender along weak axis while maintaining sufficient intensity along strong axis, thus are redirected the vehicle of shock.In addition, although the supporting strut (supporting strut 500 and 600 of such as Fig. 5 A-5C) comprising reduction at least partially of these supporting struts in guardrail safety system 100 may be wished, but supporting strut also can comprise the supporting strut of traditional unmodified, or be suitable for other structure members that guardrail beam is supported.Fig. 7 A-7C illustrates the supporting strut of such unmodified.Supporting strut 700 does not comprise excision district 508, and can comprise the linear pillar (W6 × 8.5 pillar of such as unmodified) of standard or have any other supporting strut of suitable dimension, weight and structure.

Although guardrail beam unclamps when can be formed at Vehicular impact by some supporting strut, even if may wish that terminal supporting strut also remains connected to guardrail beam after enemy is clashed into or break-in is clashed into.Fig. 8 A and Fig. 8 B illustrates can the exemplary embodiment of terminal supporting strut 800 that uses of the fence sytsem 100 of composition graphs 1.With reference to figure 1, terminal supporting strut 800 is the first terminal supporting struts at terminal part 108 upstream extremity place.Fig. 8 A is the lateral view of terminal supporting strut 800, and Fig. 8 B is the elevation of same terminal supporting strut 800.

In a particular embodiment, terminal supporting strut 800 is releasably attachable to guardrail beam 102 (such as guardrail beam 102), and give the grappling that guardrail beam 102 provides actual, to react to the tensile load on guardrail beam 102, the vehicle of length direction to Transverse Impact along guardrail beam 102 is redirected.Employ various element to realize and guardrail beam 102 is connected to terminal post 800, make when fence sytsem 100 is subject to vehicle impact with the impact that enemy is clashed into or break-in types of impacts is carried out, guardrail beam 102 remains connected to terminal supporting strut 800.Like this, even if guardrail beam also keeps being supported with tensioning state after such shock.But when fence sytsem 100 is subject to vehicle impact impact in reverse direction, the tensioning connected mode of guardrail beam 102 will be unclamped from terminal supporting strut 800, to prevent vehicle unstability and excessive vehicle deceleration.

In an illustrated embodiment, terminal supporting strut 800 comprises the structure member 802 of I beam construction.Structure member 802 comprises the pair of flanges 804 interconnected by center connecting plate 806.In a currently preferred embodiment, beam parts 802 comprise W6 × 15 steel strut parts.A pair rectangular side panels 808 is fixed to the two opposite sides of structure member 802.Preferably, side plate 808 is fastened to each flange 804 by welding.

Connector assembly is used to structure member 802 to be connected to guardrail beam.Connector assembly is constructed such that clash into the enemy of vehicle or maintain the connection between the terminal part of this structure member and guardrail beam in break-in knockout process.But this connector assembly is formed in reverse knockout process and unclamps this connection.In a particular embodiment, connector assembly comprises multiple stacking rectangular slab, and these rectangular slabs are spent accurate to receive the terminal part of fence sytsem.Such as, connector assembly can comprise the stacking of three plates: flange plate 810, retainer plate 816 and washer plate 824.

Flange plate 810 is fastened between side plate 808.Flange plate 810 is preferably integrally formed part, is fastened to structure member 802 and each side plate 808 by welding manner.Flange plate 810 (as Fig. 9 A is illustrated best) comprises rectangular slab, and this rectangular slab has V-arrangement excision district 812 in the center of the top edge 813 of flange plate 810.In an illustrated embodiment, flange plate 810 has the length of about 5 inches and the width of about 6 inches.The thickness (as Fig. 8 B is illustrated best) of flange plate 810 can be about 1 inch.

The center of V-shaped groove 812 along the horizontal width of flange plate 810, vertical length about 1 inch, horizontal width about 1 and 3/4 inch.But described and shown flange plate 810 size is only used to example object.Although shown size may be suitable when structure member 802 comprises W6 × 15 steel strut parts, the size of flange plate 810 can change, and can depend on size and the scale of structure member 802.

Get back to Fig. 8 B, retainer plate 816 is arranged to adjacent with flange plate 810.Similar with flange plate 810, retainer plate 816 is preferably integrally formed part.As Fig. 9 B is illustrated best, retainer plate 816 comprises the rectangular slab with circular open 818, the top edge 820 of the contiguous retainer plate 816 of this opening.In an illustrated embodiment, retainer plate 816 has the about 3 not only vertical length of 1/8 inch and the horizontal width of about 5 but also 3/8 inches.The center of opening 818 along the horizontal width of retainer plate 816, about 7/8 inch away from top edge 820 of retainer plate 816 be, center.U-shaped opening 818 can have the diameter of about 1 and 1/4 inch.But described and shown retainer plate 816 size is only used to example object.Although shown size may be suitable when structure member 802 comprises W6 × 15 steel strut parts, the size of retainer plate 816 can change, and can depend on size and the scale of structure member 802 and flange plate 810.

Get back to Fig. 8 B, washer plate 824 is arranged to adjacent with retainer plate 816.With flange plate 810 and retainer plate 816 similar, washer plate 824 is preferably integrally formed part.As Fig. 9 C is illustrated best, washer plate 824 comprises the rectangular slab with U-lag 826, and this U-lag is in the center of the top edge 828 of washer plate 824.In an illustrated embodiment, washer plate 824 has the about 4 not only vertical length of 1/8 inch and the horizontal width of about 5 but also 1/2 inches.As Fig. 8 B is illustrated best, the thickness of washer plate 824 can be about 1/2 inch.

The center of U-lag 826 along the horizontal width of washer plate 824, and has the about 1 not only vertical length of 1/4 inch and the horizontal width of about 1 but also 1/8 inch.The groove 826 of bottom in fillet has the diameter of about 1 and 1/4 inch.But described and shown washer plate 824 size is only used to example object.Although shown size may be suitable when structure member 802 comprises W6 × 15 steel strut parts, the size of washer plate 824 can change, and can depend on size and the scale of structure member 802.

Flange plate 810, retainer plate 816 and washer plate 824 comprise a pair screw 830 separately.In an illustrated embodiment, the diameter of screw 830 is about 3/8 inch.When being assembled together, the respective screw 830 of flange plate 810, retainer plate 816 and washer plate 824 is aligned with each other substantially.Pair of screws 832 can be fastening through screw 830, thus flange plate 810, retainer plate 816 and washer plate 824 are tightened together.Packing ring 834 can be screwed to the end of each screw 832 by engagement thread, thus is relative to each other clamped together by these plates.

As mentioned above, the object of terminal supporting strut 800 is that guardrail beam 108 is fastened on tensioning state.Figure 10 A and Figure 10 B illustrates and exemplarily guardrail beam 1000 is connected to terminal supporting strut (the terminal supporting strut 800 such as shown in Fig. 8 A and 8B) with tensioning state.Specifically, the fluting guardrail beam 1000 of pressurized is connected to junction plate 1002, and guardrail beam 1000 is similar to those guardrail beams above described in composition graphs 1, Fig. 2 and Fig. 4 A-4B.

In an illustrated embodiment, junction plate 1002 comprises a pair screw 1004, and a pair similar screw (not shown) that these screws can be slotted in the terminal of guardrail beam 1000 with pressurized is aimed at.Pair of screws 1006 can be screwed into through the similar size screw (not shown) aimed at screw 1004 in screw 1004 and guardrail beam 1000.Nut 1008 can be guaranteed through the respective connection of the screw 1006 of junction plate 1002 and guardrail beam 1000.In a particular embodiment, the screw in screw 1004 and guardrail beam 1000 can have the diameter of about 7/8 inch of magnitude.In such embodiments, screw 1006 can comprise 2 and 1/2 × 3/4 " GR.5 screw.But be understood that these sizes only exemplarily provide.Can use the screw of any suitable dimension and screw that guardrail beam 1000 is fastened to junction plate 1002.

Junction plate 1002 is connected to threaded rod 1010.In a particular embodiment, threaded rod 1010 can be soldered to junction plate 1002.As Fig. 8 B illustrates best, the V-arrangement that threaded rod 1010 passes flange plate 810 excises district 814, the circular open 818 of retainer plate 816 and the U-shaped excision district 826 of washer plate 824 and is screwed into.Nut 836 is screwed onto the end of threaded rod 1010, so that guardrail beam 1000 is fastened to terminal supporting strut 800 with tensioning state.

The existence of nut 836 prevents cable 1010 to retract from opening, and these openings excise district 826 by the V-arrangement excision district 814 of flange plate 810 and the U-shaped of washer plate 824 to be formed.Opening due to retainer plate 816 comprises the excision district opened wide in the edge of closed circular open 818 instead of retainer plate 816, so retainer plate 816 ensure that threaded rod 1010 is in place suitably.The intensity of threaded rod 1010 to the tensioning state connection increase of terminal post 800 returned by retainer plate 816.Washer plate 824 is used as the packing ring between screw 834 and retainer plate 816, also adds intensity to this connection.

In the enemy's shock carried out the fence sytsem comprising above-mentioned feature or break-in knockout process, Fig. 8 A-8B, Fig. 9 A-9C and the assembly described in Figure 10 A-10B make guardrail beam 1010 be connected with the tensioning of terminal supporting strut 800 can keep complete.Because guardrail beam 1010 remains on tensioning state, so guardrail beam 1010 can be redirected vehicle impact.Can eliminate the post warpage of this system, and the eccentric vehicle clashed into can stay in moderating process longer within the system.

On the contrary, when vehicle is along when oppositely clashing into this fence sytsem, the tensioning connection status of guardrail beam 1010 can be released.Such as, oppositely shock can make top edge 820 directly over circular open 818, retainer plate 816 be subject to shearing (shear).Like this, threaded rod 1010 departs from from the opening excising district 812 by V-arrangement, U-shaped excises district 826 and circular open 818 is formed.Because the tensioning connection status of guardrail beam 1000 is released, so guardrail beam 1000 can be disintegrated to controllably, to prevent vehicle unstability or excessive deceleration.

Unclamping this tensioning connection status to help further in reverse knockout process, with the pole (strut) of amendment, terminal supporting strut can be connected to the first adjacent supporting strut.Such pole is represented by label 140 in fig. 2, and illustrates in more detail in Figure 11 A and Figure 11 B.In an illustrated embodiment, pole 140 comprises longitudinal beam parts 1112, and these parts are modified to include pole plate 1114.Longitudinal beam parts 1112 can comprise any suitable cross sectional shape.The length of longitudinal beam parts 1112 is suitable for terminal supporting strut 106 to be connected with next adjacent supporting strut 104.In a particular embodiment, longitudinal beam parts 1112 can comprise C channel component, and this C channel component has the width of about 6 inches of magnitudes and the degree of depth of about 2 inches of magnitudes.

As Figure 11 B is illustrated best, pole plate 1114 is preferably integrally formed part, is fastened to longitudinal beam parts 1112 by welding manner.Pole plate 1114 comprises rectangular slab, and this rectangular slab has U-shaped excision district 1116 in the center of the top edge 1118 of pole plate 1114.In an illustrated embodiment, pole plate 1114 has the horizontal dimension of about 10 inches and the vertical size of about 8 inches.The thickness of pole plate 1114 can be about 1/4 inch.The center of U-lag 1116 is along the vertical direction of pole plate 1114, and vertical size is about 1 and 1/2 inch, and horizontal dimension is about 5 and 1/2 inch.Bottom the fillet of U-lag 1116,1120 have the diameter of about 1 and 1/2 inch.But the size of described and shown pole plate 1114 is only used to example object to be provided.The size of pole plate 1114 and longitudinal beam parts 1112 can change.

When vehicle clashes into guardrail girder system system along direction, pole 1112 and pole plate 1114 can so that unclamp the tensioning connection status between guardrail beam and terminal supporting strut.The port of export of the contiguous flattened section 112 in position of pole plate 1114.Pole plate 1114 is used as slope, so that the threaded rod being connected to guardrail beam excises district 814, the opening 818 of retainer plate 816 and U-shaped excision district 826 lifting of washer plate 824 from the V-arrangement of flange plate 810.Owing to having unclamped the tensioning connection status in guardrail beam 1000, pole 1112 and pole plate 1114 have prevented unstability or the excessive deceleration of vehicle impact.

As mentioned above, Figure 10 A and Figure 10 B illustrates the exemplary tensioning connection of guardrail beam and threaded rod.Figure 12 illustrates and can be used for the alternative embodiment of tensioning connection guardrail beam being connected to terminal post.In an illustrated embodiment, the guardrail beam 1200 of fluting can be revised similarly with the guardrail beam 200 of Fig. 4 A.The guardrail beam 1200 of fluting is modified at terminal 1202 place, and is connected to cable bar 1204.In a particular embodiment, the guardrail beam 1200 of fluting can be connected to a pair cable bar 1204.

Cable bar 1204 can cross flattened section 1206.Flattened section 1206 can be similar to the flattened section 110 of Fig. 1-Fig. 3.Therefore, the length that flattened section 1206 can be crossed at least partially of cable bar 1204, and leave opening 1206 at the upstream extremity place of flattened section 1206.After leaving opening 1206, cable bar 1204 can with mechanism similar described in composition graphs 8A-8B, Fig. 9 A-9C and Figure 10 A-10B above, be fastened to terminal post 106 at ground place.

The technological merit of specific embodiments of the invention comprises the measure of guardrail beam end, and this end measure is the Impact energy that dissipated by the compression of W beam guardrail element.Specifically, by make vehicle impact slow down needed for a part of guardrail planarized, the Impact energy of the vehicle collided with guardrail end can dissipate by the measure of guardrail end.Another advantage can be that this end measure forces W beam guardrail element through plat structure, and guardrail is squeezed into comparatively smooth plate by this structure.Different from system before this, this W beam guardrail element can be flattened at vertical direction instead of horizontal direction.

Additional advantage can be: be connected to terminal supporting strut for by the end of W beam guardrail element, can provide tensioning, resistant connected mode.The system element providing tensioning to be connected to guardrail beam and terminal supporting strut can make guardrail beam can keep fastening after enemy is clashed into or break-in is clashed into.Like this, this system can remain on tensioning state in the knockout process of this two type.But another advantage can be: when system is subject to oppositely clashing near terminal, tensioning state can be released.Vehicle unstability and excessive deceleration is prevented for oppositely clashing into the tensioning state unclamping guardrail element.

Although described the present invention by several embodiment, it may occur to persons skilled in the art that variations and modifications form.Will be understood that these change and modification of present invention encompasses and dropping within the scope of current claims.Such as, feature mentioned above can be used individually and/or with being bonded to each other, or is combined with other Change In Design forms.

Claims

1. a terminal part for guardrail safety system, comprising:

The terminal part of guardrail beam, comprises upstream extremity and downstream, and at the upstream extremity place of described terminal part, the terminal part of described guardrail beam is not from the first vertical high inclination being suitable for being redirected drift vehicle to subaerial second vertically highly;

Multiple supporting strut, it is installed with the contiguous highway of the mode be spaced apart from each other, and described multiple supporting strut is connected to the terminal part of described guardrail beam; With

Terminal supporting strut, its upstream extremity place in the terminal of most end is close to described highway and installs, described terminal supporting strut is by resistant, the connected mode of tensioning and be connected to the upstream extremity of the terminal part of described guardrail beam, described resistant, the connected mode of tensioning maintains tensioning state in the terminal part of described guardrail beam, the enemy carried out at vehicle is clashed into or in break-in knockout process, described resistant between described terminal supporting strut and described guardrail beam, the connection of tensioning is maintained, and in reverse knockout process, described resistant between described terminal supporting strut and described guardrail beam, the connection of tensioning is released.

2. terminal part according to claim 1, wherein, the terminal part of described guardrail beam is arranged essentially parallel to highway.

3. terminal part according to claim 1, wherein, the terminal part of described guardrail beam is in the upstream extremity Chu Cong highway abduction of described guardrail beam.

4. terminal part according to claim 3, wherein, described abduction is parabolic manner substantially.

5. terminal part according to claim 3, wherein, described abduction is linear substantially.

6. terminal part according to claim 1, wherein, described guardrail beam comprises is with ripply W beam in the vertical, and described W beam has upper and lower peak and these high peak-to-peak low ebbs.

7. terminal part according to claim 6, wherein, the terminal part of described guardrail beam is modified to include slot area, described slot area comprises one group of three groove, longitudinally extend in each of these grooves in described upper and lower peak and these high peak-to-peak low ebbs, the ability that the terminal part that described slot area increases described guardrail beam is flattened.

8. terminal part according to claim 7, wherein, the upstream extremity of described guardrail beam is flattened to the plate of four vertical stackings.

9. terminal part according to claim 1, wherein, the upstream extremity of described guardrail beam is connected to threaded rod, when described vehicle carries out enemy's shock or break-in is clashed into, described threaded rod and described connected mode that is resistant, tensioning cooperate to maintain tensioning state in the terminal part of described guardrail beam.

10. terminal part according to claim 1, also comprise impact head, described impact head is connected to the first support member being arranged in described terminal supporting strut downstream, and described impact head flatly can be shifted the Impact energy that dissipates in head on collision process on downstream direction.

11. terminal parts according to claim 1, wherein, at least one in described multiple supporting strut comprises modified supporting strut, and described modified supporting strut comprises:

Bottom, it is for being arranged on below the adjacent slope, road of described highway;

Middle part, it is substantially adjacent with slope, described road, described middle part comprises weakening part, and described weakening part can make described supporting strut weaken about first axle, and does not substantially change the behavior of described supporting strut about second axis generallyperpendicular with described first axle; With

Top, it is releasably attachable to the terminal part of described guardrail beam.

12. terminal parts according to claim 1, wherein, described connection that is resistant, tensioning comprises connector assembly, described connector assembly comprises multiple plate, these plates are stacking adjacent to each other, at least one in described multiple plate is fixed to the end of described terminal supporting strut, and described multiple plate comprises:

First plate, it comprises the rectangular slab with V-arrangement excision district, and described V-arrangement excision district is at the top edge of described rectangular slab;

Second plate, it comprises the rectangular slab with circular open; With

3rd plate, it comprises the rectangular slab with U-shaped excision district, and described U-shaped excision district is at the top edge of described 3rd plate; And

Wherein, when described first plate, described second plate and described 3rd plate by stacking adjacent to each other time, described V-arrangement excision district, described circular open and described U-shaped excision district are aligned with each other.

The terminal part of 13. 1 kinds of guardrail safety systems, comprising:

The terminal part of guardrail beam;

Terminal supporting strut, it is connected to the upstream extremity of the terminal part of described guardrail beam, and described terminal supporting strut comprises:

Have the structure member of longitudinal axis, described structure member is for being arranged on below the adjacent slope, road of highway;

Connector assembly, the terminal part of described guardrail beam is connected to described structure member with acutangulating relative to the longitudinal axis of described structure member by it, described connector assembly comprises opening, and the upstream extremity of the terminal part of described guardrail beam is arranged through described opening;

Wherein, the vehicle that is connected between the terminal part of described structure member and described guardrail beam carries out enemy and clashes into or be maintained in break-in knockout process, and released in reverse knockout process.

14. terminal parts according to claim 13, wherein, described structure member comprises the pair of flanges interconnected by center connecting plate.

15. terminal parts according to claim 13, wherein, described connector assembly comprises multiple plate, these plates are stacking adjacent to each other and arrange with acute angle relative to the longitudinal axis of described structure member, at least one in described multiple plate is fixed to the end of described structure member, and each in described multiple plate comprises opening.

16. terminal parts according to claim 15, wherein, described multiple plate comprises:

Second plate, it comprises the rectangular slab with circular open; With

17. terminal parts according to claim 13, also comprise multiple supporting strut, and these supporting struts are installed with the contiguous highway of the mode be spaced apart from each other, and described multiple supporting strut is connected to the terminal part of described guardrail beam.

18. terminal parts according to claim 17, wherein, the terminal part of described guardrail beam is arranged essentially parallel to described highway.

19. terminal parts according to claim 17, wherein, the terminal part of described guardrail beam is in the upstream extremity Chu Cong highway abduction of described guardrail beam.

20. terminal parts according to claim 19, wherein, described abduction is parabolic manner substantially.

21. terminal parts according to claim 19, wherein, described abduction is linear substantially.

22. terminal parts according to claim 13, wherein, described guardrail beam comprises is with ripply W beam in the vertical, and described W beam has upper and lower peak and these high peak-to-peak low ebbs.

23. terminal parts according to claim 22, wherein, the terminal part of described guardrail beam is modified to include slot area, described slot area comprises one group of three groove, longitudinally extend in each of these grooves in described upper and lower peak and these high peak-to-peak low ebbs, the ability that the terminal part that described slot area increases described guardrail beam is flattened.

24. terminal parts according to claim 22, wherein, the upstream extremity of described guardrail beam is flattened to the plate of four vertical stackings.

25. terminal parts according to claim 13, wherein, the upstream extremity of described guardrail beam is connected to threaded rod, and described threaded rod is through opening in described connector assembly and fastening.

The terminal part of 26. 1 kinds of guardrail safety systems, comprising:

Have the structure member of longitudinal axis, described structure member is for being arranged on below the adjacent slope, road of described highway;

Connector assembly, the terminal part of described guardrail beam is connected to described structure member with acutangulating relative to the longitudinal axis of described structure member by it;

27. terminal parts according to claim 26, wherein, the terminal part of described guardrail beam is arranged essentially parallel to described highway.

28. terminal parts according to claim 26, wherein, the terminal part of described guardrail beam is in the upstream extremity Chu Cong highway abduction of described guardrail beam.

29. terminal parts according to claim 28, wherein, described abduction is parabolic manner substantially.

30. terminal parts according to claim 28, wherein, described abduction is linear substantially.

31. terminal parts according to claim 26, wherein, described guardrail beam comprises is with ripply W beam in the vertical, and described W beam has upper and lower peak and these high peak-to-peak low ebbs.

32. terminal parts according to claim 31, wherein, the terminal part of described guardrail beam is modified to include slot area, described slot area comprises one group of three groove, longitudinally extend in each of these grooves in described upper and lower peak and these high peak-to-peak low ebbs, the ability that the terminal part that described slot area increases described guardrail beam is flattened.

33. terminal parts according to claim 31, wherein, the upstream extremity of described guardrail beam is flattened to the plate of four vertical stackings.

34. terminal parts according to claim 26, wherein, the upstream extremity of described guardrail beam is connected to threaded rod, and when described vehicle carries out enemy's shock or break-in is clashed into, described threaded rod and the cooperation of described connector assembly to maintain tensioning state in the terminal part of described guardrail beam.

35. terminal parts according to claim 26, also comprise impact head, described impact head is connected to the first support member being arranged in described terminal supporting strut downstream, and described impact head flatly can be shifted the Impact energy that dissipates in head on collision process on downstream direction.

36. terminal parts according to claim 26, wherein, at least one in described multiple supporting strut comprises modified supporting strut, and described modified supporting strut comprises:

37. terminal parts according to claim 26, wherein, described connector assembly comprises multiple plate, and these plates are stacking adjacent to each other, and at least one in described multiple plate is fixed to the end of described structure member, and described multiple plate comprises:

Second plate, it comprises the rectangular slab with circular open; With