WO2014102844A2

WO2014102844A2 - Polyhedric modular connector for housing multiform profiles, bars and brackets-steel stirrups

Info

Publication number: WO2014102844A2
Application number: PCT/IT2013/000369
Authority: WO
Inventors: Michele Caboni
Original assignee: Michele Caboni
Priority date: 2012-12-28
Filing date: 2013-12-27
Publication date: 2014-07-03
Also published as: WO2014102844A3; ITTO20121169A1

Abstract

A polyhedric modular connector (100) is described, for housing multiform profiles (108), rods (111,117) and structural brackets (30) for the creation of any type of cage of aseismic reinforcement, even of complex shape for modular building construction comprising at least: first means (102) for connection immovably to said brackets (30); second means (104) for eventual operative coupling to another connector (100); third means (106) for housing at least one multiform profile (108); fourth means (110) for housing at least a first bar (111) whose longitudinal axis is transverse to the longitudinal axis of said polyhedric modular connector (100); and fifth means (116) for housing at least a second bar (117) whose longitudinal axis is perpendicular to the longitudinal axis of said polyhedric modular connector (100).

Description

POLYHEDRIC MODULAR CONNECTOR FOR HOUSING MULTIFORM PROFILES, BARS AND BRACKETS-STEEL STIRRUPS

The present invention relates to a polyhedric modular connector for the perfect bond and housing multiform profiles, bars and brackets for the in situ creation of any type of reinforcement cages accompanied by aseismic brackets even of complex shape; such polyhedric modular connector matches to structural brackets which is fitted a modular construction system for the armor of any type of plinths, foundation beams (beams dual slope and Y shaped T-Shaped, Slab-on-grade foundation) , lowered beams, horizontal beams, column bars, pillars of any shape, any type of earthquake-resistant partitions in concrete to diffuse reinforcement for formwork variable geometry.

In particular, the present invention relates to a polyhedric modular connector used in a process for the integration in each type of element advantageously prefabricable also in situ, also removable, advantageously coupled to any type of insulating panels for the construction in prefabrication and, obviously also in situ of a plurality of types of building envelopes, also breathable responsive to current seismic codes, national and international, such as Eurocode (European Community) and ASTM International- Common ASTM specification are: American Concrete Institute : "Building Code Requirements for Structural Concrete (ACI 318-11) and Commentary," ISBN 978-0-87031-744-6 As is known, the formwork is a structure used in construction since the early 1900s, for the construction of reinforced concrete structures and represents the envelope within which, once properly positioned and linked to the reinforcing steel in accordance with structural calculations, is performed the casting of concrete in the fluid state and where it remains until the end of the process of taking and after that, started the hardening phase, the jet has achieved a mechanical strength such as to ensure the absorption of the stresses to which the structure is submitted immediately after the disarmament of the formwork and/or caisson itself being a momentary shuttering only for the containment of concrete in a fluid state. The formworks can be made with different materials and, in particular, there are currently in the global market, formworks composed of panels facing each other, which in turn form a cavity inside them to contain the concrete casting, with a basis of polystyrene foam with the well-known technique generally called Insulated concrete Forms (ICF) and connectors, and/or spacers non-structural elements that are "disposable" necessary to assembly and internal locking of the various above- mentioned panels forming the caisson of a reinforced concrete wall.

It is known to build with concrete involves many steps to achieve the best results, including forming, grading, placing and finishing of the entire building envelope. A key step is to put the rebar and or brackets for reinforced concrete, formwork that are properly within the conventional removable panels that "disposable" and ICF system that they stay-in-place in situ as thermal insulation in order to ensure the minimum concrete cover .

It is always known that building a reinforced concrete structure in the traditional way is subject to multiple complications both in the same phase of its construction that during its life. It is now known for some time that the civil shipbuilding is a high risk of accidents sector and assembly activities and positioning within the formwork, the reinforcement cages are a number of issues that do not allow an impromptu and not carefully planned carrying out.

These problems become more obvious during the assembly and positioning of the reinforcement cages widespread inside of the caissons of the foundation wall and floor, which are interconnected between them through to the formation of structural nodes being also the latter in their turn embedded in concrete for forming the building envelope.

Obviously with the reinforcement cages positioned in all its horizontal and inclined vertical partitions of the building structure (T- Shaped, Slab-on-grade foundation) becomes impossible to obtain the thickness of the concrete cover enough, being the same associated bars to the brackets linked in a traditional manner to form the building structure which is designed with a T- Shaped, Slab-on-grade foundation, frame structure or monolithic. Steel has an expansion coefficient nearly equal to that of modern concrete. If this were not so, it would cause problems through additional longitudinal and perpendicular stresses at temperatures different than the temperature of the setting. Although rebar has ribs that bind it mechanically to the concrete, it can still be pulled out of the concrete under high stresses, an occurrence that often accompanies a larger-scale collapse of the structure. To prevent such a failure, rebar is either deeply embedded into adjacent structural members (40-60 times the diameter) , or bent and hooked at the ends to lock it around the concrete and other rebar. This first approach increases the friction locking the bar into place, while the second makes use of the high compressive strength of concrete.

Common rebar is made of unfinished tempered steel, making it susceptible to rusting. Normally the concrete cover is able to provide a pH value higher than 12 avoiding the corrosion reaction. Too little concrete cover can compromise this guard through carbonation from the surface, and salt penetration .

Too much concrete cover can cause bigger crack widths which also compromises the local guard. As rust takes up greater volume than the steel from which it was formed, it causes severe internal pressure on the surrounding concrete, leading to cracking, spalling, and ultimately, structural failure .

This phenomenon is known as oxide jacking. This is a particular problem where the concrete is exposed to salt water, as in bridges where salt is applied to roadways in winter, or in marine applications. Uncoated, corrosion-resistant low carbon/chromium (microcomposite) , epoxy-coated, galvanized or stainless steel rebars may be employed in these situations at greater initial expense, but significantly lower expense over the service life of the project.

And the more I notice that the construction of the cages to be armed with steel profiles that tie rods can not be perfectly, although bound by brackets, or assemble them in a timely manner and millimeter, of course, the same can not guarantee once embedded in the concrete cover concrete to obtain a building structure (T-Shaped, Slab-on- grade foundation) .

For the solution of the aforementioned problems, the present invention relates to a special polyhedric modular connector adapted to contain the reinforcing bars and brackets associated with each other, advantageously carried out in situ in order to obtain an a seismic structure in reinforced concrete in which the inventive polyhedric modular connector it is possible to bind in a perfect way the reinforcement cages for interlocking in order to advantageously obtain the desired thickness of the concrete cover to ensure an exclusive duration of the building envelope thus obtained in all its partitions that compose it, even if they are exposed in areas with adverse weather.

The special polyhedric modular connector adapted to contain the reinforcing bars and brackets associated with each other, advantageously eliminates the root of the disastrous effects of corrosion on the steel reinforcements mentioned that compose a building structure of reinforced concrete ( T-Shaped, Slab-on-grade foundation) made in situ.

The polyhedric modular connector is integrated into a structure in reinforced concrete, provided with concrete, and a group of reinforcement and/or cages associated with steel brackets embedded in the concrete that forms the structural partitions of a building envelope.

The assembly of reinforcement bars in reinforcement has: a plurality of main reinforcement steel bars extended in a straight line so as to be parallel to each other, and shear reinforcements (steel brackets) arranged at intervals along the longitudinal direction of the main bars for reinforcement, so as to enclose the main groups of steel bars.

The reinforcements cutting steel brackets are arranged in the outermost position of the group of reinforcement of said reinforcements in order to form a cage to diffuse reinforcement.

The distance between the outer periphery of the reinforcements to resist cutting and the concrete surface represents the thickness of the concrete cover ( ) obtained advantageously for constraint created by the inventive polyhedric modular connector .

Each of shear reinforcements is made from a reinforcing bar having a flat cross section, arranged so that the direction of the short axis X of the cross section is perpendicular to the surface of the concrete and bent so that a pair of surfaces opposite other in the direction of the short axis ( X ) are arranged on the inside flank and the outside in order to achieve aseismic widespread reinforcement cages in situ.

Parametric analysis

It has been analyzed the effect of different classes of concrete C20/25, C25/30 and C30/37.

Furthermore, two other variables were considered: three different diameters of reinforcing bars Φ12, Φ16 and Φ20 and two different values of concrete cover 20 mm and 30 mm. The choice of these parameters was conducted trying to identify the exposures to the most critical (in terms of concrete cover and concrete strength) listed in the standard UNI EN 206-1; it was chosen a class of corrosion by carbonation (XC1 class) , another by chloride of sea water (class XS1) and another by cycles of freeze/thaw with the presence of deicing agents (class XF2). The results of the analysis of these 18 cases are reported in Table 3. It is noted that an increase of the strength class of the concrete from C20/25 to C30/37 corresponds to an increase of traction strength of about 30%, while the increase in terms of internal displacement is approximately 19% and is be almost independent of the diameter of the bar and the concrete cover.

In contrast, for the same increase in traction strength of the concrete, it is observed an equal increase in terms of internal pressure, regardless of the diameter of the bar and the thickness of the concrete cover.

A bar or rod, usually horizontal, that is under tension and connects the end joints of a building structure, which are subject to horizontal thrust forces. By tightening the ends of the structures, the tie beam absorbs the thrust, relieving the supports of the horizontal force

Table 3. Main Results of FEM modeling of specimens with single bar

Although the known connectors currently used to simplify greatly the assembly of the formwork generally, for the positioning of the bars that constitute such as reinforcement cages of the foundation beams (T-Shaped, Slab-on-grade foundation), column bars, of the pillars, of the partition walls, floors etc., typically in the form of steel rods, are still used traditional techniques that provide positioning, longitudinally and vertically reinforcing rods, obviously not perfect and not so constrained as would require a real distributed reinforcement to ensure a better aseismic response, according to two basic modes:

- The iron bars are inserted individually and then maintained in the desired position by ligation with the well-known cooked wire to a plurality of horizontal cages, brackets usually made with a rod bent in a quadrangular way, arranged along the reinforcing bars: this system does not guarantee a perfect positioning of the bars and/or brackets, with obvious lack of necessary concrete covering and if, not last disadvantage, obviously requires significant costs and relatively long time for laying even if that cage (T-Shaped, Slab-on-grade foundation) is assembled by skilled labor;

- The reinforcement is formed by cages prewelded or tied with cooked iron wire that already incorporate both the vertical irons both the horizontal structures of the containment of the first: in this case the transport of such cages armed truly becomes onerous and expensive in that, they occupy an extremely high volume as a function of their weight and of their size and if, not last disadvantage, is the same storage in situ, and the lifting of the same with consequent positioning within the formwork and/or known conventional caissons, the pose the same reinforcing cage (T- Shaped, Slab-on-grade foundation) , in fact, would not provide the concrete cover required by law domestically and internationally, and it becomes obvious that such manipulation of the reinforcement cages prepackaged would put at risk the safety of construction workers.

The purpose therefore of the present invention is to advantageously solve the above problems of the prior art now become obsolete and expensive, providing a modular connector multifunction, for the perfect bond and housing of all types of multiform structural profiles, rods and steel brackets for creation in situ, of all types of anti-seismic reinforcement cages, characterized by diffuse reinforcement assembled in situ in a perfect way, for an exclusively modular construction system for the armature of the foundation beams (T-Shaped, Slab-on-grade foundation) of the most disparate conformations even the most complex, lowered beams, horizontal beams, column bars, pillars of any type and gender, concrete core walls earthquake-resistant for variable geometry formwork that allows the installation also in situ, so simple as a Lego, practical and fast for reinforcing bars of such foundation beams, beams lowered, horizontal beams, column bars, pillars, concrete core walls, etc.

Another object of the present invention is to provide a polyhedric modular connector for the perfect bond and housing of all types of multiform profiles, bars and steel brackets for the creation of anti-seismic reinforcement cages of any shape for a modular construction system for the reinforcement of the foundation beam (T-Shaped, Slab-on-grade foundation) even in complex geometry, lowered beams, horizontal beams, column bars, pillars, aseismic concrete core walls for variable geometry formwork composed of modular elements associable with a Lego, easily positionable according to the most varied needs of the project and easily transportable if carried out in the factory and/or in situ, because light, separable and overlapping in volumes extremely reduced both for storage and for transport.

Furthermore, an object of the present invention is to provide a polyhedric modular connector for a perfect bond and housing of multiform profiles, bars and brackets for the creation in situ of any type of anti-seismic reinforcement cages for a modular system for the reinforcement of all types of foundation beams (T- Shaped, Slab-on-grade foundation) , lowered beams, horizontal beams, column bars, pillars, aseismic concrete core walls for variable geometry formwork composed of elements that can be easily positioned under the most various structural needs of the project and, easily assembled, in order to guarantee the exclusive security on site during their assembly to create any type of building envelope in all its partitions (T-Shaped, Slab-on- grade foundation wall floor roof ecc) that compose it, namely an advantageously assemblable kit system also by non-experts of building constructions in general .

The above and other objects and advantages of the invention, as will appear from the following description, are achieved with a polyhedric modular connector for the perfect bond and housing of any multiform profile, bars and brackets for the creation in situ of any type of steel cages anti- seismic reinforcement for building constructions also transpiring in situ, as described in claim 1, and a modular construction system for the reinforcing of any type of foundation beam even the most complex (T-Shaped, Slab-on-grade foundation) , thick beams, lowered beams, column bars , pillars, aseismic concrete core walls for variable geometry formwork that uses the connector for the perfect bond and housing of any type of multiform profiles, rods, column bars, steel brackets and any supplementary structural element.

Preferred embodiments and not trivial variations of the present invention are the subject of the dependent claims.

It will be immediately obvious that it will be possible to make as described numerous variations and modifications (for example related to shape, sizes, arrangements and parts with equivalent functionality) without departing from the scope of the invention as appears from the attached claims. The present invention will be better described by some preferred embodiments, given as an example and not limitative, with reference to the enclosed drawings, in which:

- Figure 1 shows a perspective view of a preferred embodiment of a component element of the modular construction system for the reinforcement- steel stirrups of any type of foundation beams (T- Shaped, Slab-on-grade foundation) , thickness beams, horizontal beams, lintels, column bars , pillars, aseismic concrete core walls for variable geometry formwork according to the present invention;

- Figure 2 shows a perspective view from above of the element of FIG. 1;

- Figure 3 shows a top perspective view of a preferred embodiment of another component element of the modular construction system according to the present invention;

- Figure 4 shows a front view of the element of Figure 3;

- Figure 5 shows a side view of the element of Figure 3;

- Figure 6 shows a top perspective view of the elements of the system according to the present invention assembled in situ according to a possible configuration of installation;

- Figure 7 shows a perspective view from below of the elements of the modular system according to the present invention assembled in situ according to another possible configuration of installation;

- Figure 8 shows a perspective view from below of a preferred embodiment of another element component of the modular construction system according to the present invention;

- Figures 9, 10 and 11 show perspective views from the top of some preferred embodiments of an exclusive modular system according to the present invention;

- Figures 12 to 20 are perspective and side views of the modular construction system and of the structural steel brackets of support of the present invention; and

Figures 21 to 24 are views of possible embodiments and possible applications of the polyhedric modular connectors for structural steel brackets- steel stirrups according to the invention .

Referring to the Figures, it is possible to see that the modular construction system 1 for reinforcing foundations, thickness beams, horizontal - vertical beams, lintels, column bars, pillars, aseismic concrete core walls to widespread reinforcement also of complex shape and of inclined, vertical or for horizontal sense for variable geometry formwork comprises at least one plane of guide 10 of the vertical elements (of which hereinafter, for brevity, referred to as "irons") constituents such reinforcement, and at least one support bracket 30 of this plane 10, this bracket 30 being adapted to allow the laying of the plane of guide 10 respect to a formwork (not shown) , and in particular a formwork ICF made with panels of expanded polystyrene EPS according to the known technique Insulated Concrete Forms (ICF).

Referring in particular to Figures 1 and 2 it is possible to note that the plane of guide 10 is composed of a supporting surface 11 provided with a plurality of through openings guide - irons 13, inside which it is possible to insert the reinforcement rods and a plurality of seats connection 15, preferably arranged along the edges of the support plane 11, suitable to allow the bound connection of the plan guide 10 with one or more support brackets 30.

Obviously, the number, the size, the shape and the geometry of the arrangement of these through openings guide - irons 13 and of such locations of connection 15 may be various, without therefore departing from the scope of the present invention. Preferably, the through opening guide - irons 13 preferably has the shape of a truncated cone defined by elastic tongues 14 designed to give prominence to the iron reinforcement inserted inside it, whatever is the diameter of the latter. In addition, elastic tongues 14 provide a complete wrapping of the iron by the concrete and then a proper grip, and the compliance with national and international regulations (mentioned above) as it relates to the required distance of the covering iron concrete that ensures durability time of the constructional work thus obtained. Furthermore, the particular shape of the elastic tongues 14 (exactly with the shape of the bars of IPE, HE, UPN -T) placed in the through openings guide irons 13 of the plan guide 10 suitably shaped for the housing of the irons themselves, allows the perfect coupling of any diameter and shape of bars and steel brackets profiles such as of IPE, HE, UPN -T placed vertically and the same elastic tongues 14 retain immovable the structural elements during the concrete casting of completion.

Advantageously, the use of the plane of guide 10 with through openings guide - irons 13, in the executing phase, of well- compacted concrete for using specific building vibrator, in mixture granulometric medium/small, combined with a rational concrete cover of the reinforcement due to the perfect bond of vertical and horizontal reinforcements in the same through openings guide irons 13, is to achieve high structural strength constructional work and of course an exclusive time durability. Moreover, considering that with the guide plate 10 of the system according to the present invention, the passage of the vertical irons occurs exclusively inside the through openings guide irons 13 it is advantageously ensures the minimum covering of 2.5 cm of concrete between an iron and the other in any diameter it is, for a greater structural strength and durability as required especially by international regulations ASTM.

In particular, just as it is possible to note in Figures 3 to 5, the support bracket 30 is composed of a connection portion 31, adapted to provide a link with at least one panel of a formwork, connected to at least a portion of support 33 adapted to support at least a portion of the edge of the plane of guide 10. Obviously, the connection portion 31 may be provided with any means of connection, be it a means of mechanical connection whether any profile interlocking which allows the perfect connection of the support bracket 30 of the system according to the present invention corresponding to the profile interlocking of any type of panel also known in the prior art, therefore without departing from the scope of the present invention. In particular, the connection portion 31 comprises at least one interlocking profile substantially "T" shaped 35', 35'', 35' ^{1 1} adapted to be inserted in the corresponding interlocking profiles "T" shaped of almost all of the panels in wood concrete, aerated concrete, expanded polystyrene EPS and/or extruded polystyrene known in the art: the profile of interlocking, in order to facilitate the insertion within the profile of interlocking of the panel is provided with at least a lower portion suitably flared.

The support portion 33 comprises instead at least one support bracket 37', 37'', 37¹ ' ' adapted to support at least a portion of the edge of the plane of guide 10, such bracket 37', 37 ' ¹ , 37 ' ' ¹ preferably being provided with at least a means of connection, such as an elastic pin 39', 39'', 39''' adapted to be inserted in the inside of one of the connection seat 15 of the plane of guide 10 and gripping to interference in its internal by elastic expansion of the pin 39', 39'', 39''' itself. Preferably, between the connection portion 31 and the support portion 33 can be interposed at least one support saddle 41', 41'', 41''' adapted to support in a diffuse way, perfect, by tying one or more reinforcing iron rods arranged horizontally. The support bracket 30 may also comprise at least one means of connection 43 to a conduit of transpiration not shown) giving out from the connection portion 31 through at least one opening end 45, such conduit of transpiration being adapted to allow transpiration advantageously, eventually by the interposition of a non-return valve (not shown) , the transpiration from the inside of the reinforcement that composes the constructional work to the outside through the panels of the formwork due to the differential pressure that comes naturally to be created in the building structure so obtained by using such components assembled together in the multiple structural conformations, even the most various.

In a preferred embodiment of the support bracket 30 of the system according to the present invention such as that illustrated in Figure, it is possible to note that the bracket 30 itself may be composed of a plurality of modules (for example, the bracket 30 of the Figures is composed of three modules A', A' ' , A''') connected together by the interposition of predetermined breaking lines Ί" , Ί" ' , each of these modules A', A'', A' ' ' being composed of at least one such snap profile substantially "T" shaped 35', 35'', 35''', at least one of these support brackets 37', 37'', 37' '' with eventually at least one respective elastic pin 39', 39'', 39''' and, optionally, at least one saddle/conical seat of support 41', 41' 41'''. Consequently, for example, the module A' of the bracket 30 is composed of the interlocking profile substantially "T" shaped 35', from the support bracket 37' with the elastic pin 39', and the support saddle 41', while the module A ''' is composed of the interlocking profile substantially "T" shaped 35'', the support bracket 37·' with the elastic pin 39' ¹ and the saddle and/or conical seat support 41' ¹ and the module a^{11 1} is composed of the interlocking profile substantially "T" shaped 35''', from the support bracket 37 ''' with the elastic pin 39''' and the saddle and/or seat of support 41 ' ¹ ' .

Obviously, though by way of example each module is composed of a single profile, only one shelf and one saddle and/or conical seat, it is quite evident that it is possible to provide any other configuration of the bracket steel stirrups 30 with different numbers of these elements, also different between them between module and module, without therefore departing from the scope of the present invention.

This feature allows therefore a extreme modularity of laying in situ of the system 1 according to the present invention in that, according to the specific structural needs of the spread reinforcement in a modular way between them is possible to use the bracket steel stirrups 30 in its entirety, or partitioning the same breaking it along the predetermined breaking lines Ί" , Ί" ¹ to obtain a bracket 30 of the lower dimensions. Furthermore, always in order to allow a perfect bond and positioning of the reinforcement iron rods accompanied by steel brackets so exclusively widespread, the same profiles interlocking substantially "T" shaped 35', 35", 35''' can be equipped of at least one respective removable tongue 47', 47'', 47 ' ' ' : in particular, the removable tongue 47', 47'', 47''' can be removed from the profile interlocking substantially "T" shaped 35', 35'', 35''' breaking it even by hand along a line of pre-cut 49', 49'', 49''' in such a way as to vary the height positioning of the bracket 30 along the panel of the formwork once this profile interlocking 35', 35'', 35''' has been included in the respective interlocking profile of the panel and to allow highly accurate positioning in height of the plane of guide 10 in which it can bind and place perfectly horizontal steel brackets open and/or closed (not shown) secured by special elastic pins.

Referring in particular to Figures 6 and 7 it can then be noted the possible configurations of laying of the polyhedric modular system 1 according to the present invention within a formwork (not shown) composed of a plurality of panels of guide 1 and support brackets 30. So as it can be seen in detail in Figure 8, the system according to the present invention may further comprise at least a grid of grouting (originale: inghisaggio) 40 adapted to allow the perfect bond and grouting (originale: inghisaggio) of the column bars, pillars in the foundations and/or plinths.

In addition, so it is possible to note in particular from Figures 9, 10 and 11, in order to ensure a rigid connection between the various planes of guide 10, the system according to the present invention further comprises at least a modular system of encompassing 50 act to surround the perimeter of the structure, for example of a pillar realized by means the planes of guide 10 and the brackets 30. In a first preferred embodiment such as that illustrated in Figure 9, the modular system of encompassing 50 includes crossbars 51 preferably honeycomb shaped equipped with threaded heads, with predisposition of inner slots to each central cavity for the insertion of at least a fixing screw which is screwed to the upright of the polyhedric modular connector inventive inserted in the panel of the formwork in order to ensure the resistance against the pressure of the concrete casting in the liquid state, and at least one angular connecting element 53 adapted to be screwed to those head by means of screws, bolts and/or special snap coupling device (not shown) . The modular system of encompassing 50 further comprising at least one double element 55 with snap closure and upper and lower tooting with a rack to control the pitch and the extent of the formwork and firmly bind the crossbar 51.

In another preferred embodiment such as that illustrated in Figure 10, the modular system of encompassing 50 comprises at least one modular element reversible chain shaped 57 with constant pitch assemblable between them, to achieve any measure, without limits of conformation of the pillars or modular concrete core walls to be reinforced to withstand the thrust of the fluid concrete during the phase of integrative casting of building construction thus obtained. Furthermore, the modular element chain shaped 57 is centrally perforated to allow the insertion of at least a fixing screw which is screwed to the upright of the connector inserted in the panel in order to ensure the resistance of the pressure of the jet of concrete inside the building construction. Obviously, the modular element chain shaped 57 is particularly and advantageously suitable for reinforcing any type of column bars , pillars having oval, circular, hexagonal, octagonal sections and concrete core walls of any structural section. In a further preferred embodiment such as that illustrated in Figure 11, the modular system of encompassing 50 includes crossbars 59 with honeycomb structure equipped with heads toothed snap closure, with predisposition of inner slots to each central cavity for insertion of a fixing screw which is screwed to the upright of the connector inserted in the panel in order to ensure the resistance of the pressure of the integrative concrete casting, and at least one clamping element 61 of the heads of the crosspieces 59, such clamping element 61 being preferably of rounded shape in order to ensure the safety on the construction site to the operators.

Figures 12 to 20 are perspective and side views of the modular construction system 1 and the support brackets 30 of the present invention: in particular, the support brackets 30 are illustrated in coupling with beams 90 for the support of the reinforcement iron rods, as clearly seen in Figure 17.

Figures 21 to 24 are views of possible embodiments and possible applications of the polyhedric modular connectors 100 for the brackets 30 according to the invention.

This connector 100 is used for housing multiform structural profiles 108 (such as the bar shaped elements illustrated best in Figure 24), rods 111, 117 and the said support brackets 30 for the creation of all types of cages of asismic reinforcing to diffuse reinforcement, to be used in the system described above. To allow the purposes of the invention, the connector 100 includes:

first means 102 for connection to the unmovable support brackets steel stirrups 30: these first means 102, as shown, are preferably, but not in a limitation way, constituted by elongated elements tooth shaped that slip and fit into the elastic pins 39', 39'', 39''' of the bracket 30;

- second means 104 for the eventual operative coupling to another connector 100: these second means 104, as shown, are preferably, but not in a limitation way, consisting of a profile "S" shaped in the top view (Figure 23) that join with a corresponding profile 104 of another connector 100 (this obviously if you want to pair with each other, to support, two connectors 100, but this solution is not the only possible one, given that the polyhedric modular connector 100 inventive can also be used alone) ;

- third means 106 for the perfect bond and housing at least a multiform profile 108: these third means 106, as shown, are preferably, but not in limitation way, consisting of seats of circular cross-section adapted to contain the outermost of these multiform profiles 108;

- fourth means 110 for the perfect bond and housing at least a first bar 111 whose longitudinal axis is transverse to the longitudinal axis of the connector 100: these fourth means 110, as shown, are preferably, but not in a limitation way, consisting of seats of circular cross section and greater than that of the third housing means 106;

- fifth means 116 for the housing at least a second bar 117 whose longitudinal axis is perpendicular to the longitudinal axis of the connector 100: these fifth means 110, as shown, are preferably, but not in a limitation way, consisting of circular cross section, but open on a large part of their circumference; - sixth means 112 for the perfect bond and housing at least a third bar whose longitudinal axis is perpendicular to the longitudinal axis of the connector 100: these sixth means 112, as shown, are preferably, but not in a limitation way, consisting of seats of circular cross section and slightly greater than that of the fourth means of housing 110;

- seventh means 114 for the perfect bond and housing at least a fourth bar whose longitudinal axis is transverse to the longitudinal axis of the connector 100: these seventh means 114, as shown, are preferably, but not in a limitation way, consisting of seats of circular cross section and greater than that of the third housing means 106, but less than that of the fourth means of housing 110;

eighth means 118 housing of widened structural elements, where these eighth housing means 118 are shaped to elongated slot open; and

- ninth means 120 for the perfect bond and the housing of at least one fifth elongated element, of square cross section, whose longitudinal axis is transverse to the longitudinal axis of the connector 100: these ninth means 120, as shown, are preferably, but not in a limitation way, consisting of seats of square cross-section and greater than that of the third housing means 106, but less than that of the seventh means of housing 114. With the polyhedric modular connector 100 inventive as described above, is realized as the modular construction system 1, also described above, for the reinforcement of all types of foundations beams, thickness beams, horizontal beams, lintels, column bars, pillars, aseismic concrete core walls for variable geometry formwork: this modular system 1 is equipped with the support brackets 30 mentioned above, and each of these support brackets is adapted to connect to at least a polyhedric modular connector 100 of the invention through at least a respective one of such elastic pins 39', 39' ' , 39' ' ' .

Claims

1. Polyhedric modular connector (100) for housing multiform profiles (108), rods (111, 117) and brackets-steel stirrups (30) for the creation of aseismic spread reinforcement beams cages, characterized in that it comprises:

- first means (102) for the unmovable connection to said brackets- steel stirrups (30) shaped as a substantially "U"-shaped split;

- second means (104) for eventual operative coupling to another polyhedric modular connector (100) ;

third means (106) for housing at least one multiform profile (108), said multiform profile (108) having an elongated, not rectilinear, tubular shape;

- fourth means (110) for housing at least a first bar (111) whose longitudinal axis is transverse to the longitudinal axis of said connector (100), said fourth means (110) being constituted by a first through hole (110) ; and

- fifth means (116) for housing at least a second bar (117) whose longitudinal axis is perpendicular to the longitudinal axis of said polyhedric modular connector (100), said fifth means (116) being constituted by a seat "U" shaped (116);

- sixth means (112) for housing at least a third bar whose longitudinal axis is perpendicular to the longitudinal axis of said polyhedric modular connector (100), said sixth means (112) being constituted by a second through hole (112) ;

- seventh means (114) for housing at least a fourth bar whose longitudinal axis is transverse to the longitudinal axis of said polyhedric modular connector (100), said seventh means (114) being constituted by a seat "U" shaped ( 114 ) ;

- eighth means (118) for housing the structural elements widened, said eighth housing means (118) being shaped to elongated slot open; and - ninth means (120) for housing at least one fifth elongated element, of square cross section, whose longitudinal axis is transverse to the longitudinal axis of said polyhedric modular connector (100), said ninth means (120) being constituted by a third through hole (120) of square cross section.

2. Modular construction system (1) for the reinforcement of beams foundations, pillars, aseismic concrete core walls for variable geometry formwork, said system (1) comprising at least one guide plate (10) of the vertical elements of said structure and at least one support bracket (30) of said plane (10), said bracket -steel stirrups (30) being adapted to allow the installation of said plane of guide (10) with respect to said formwork, said support bracket- steel stirrups (30) being composed of a connection portion (31) adapted to establish a connection with at least one panel of said formwork, said connection portion (31) being connected to at least one support portion (33) adapted to support at least a portion of the edge of said guide plate (10) , said connection portion (31) comprising at least one profile interlocking substantially "T" shaped(35', 35'', 35'''), said support portion (33) comprising at least one support bracket (37', 37'', 37''·) adapted to support at least a portion of the edge of said guide plate (10) , said support bracket (30) being composed of a plurality of modules (Α' , A' ' , A' ' ') connected to each other through the interposition of predetermined breaking lines (Τ', Ί" ' ) , each of said modules (Α', A' ', A' ' ') being composed of at least one of said profiles interlocking substantially "T" shaped (35', 35'', 35'''), at least one of said support brackets (37', 37'', 37''') with preferably at least a respective said elastic pin (39', 39'', 39'·') and preferably at least one said support saddle (41^», 41'^», 41^{, ,}'), characterized in that said support bracket (30) is adapted to connect to at least a connector (100) according to claim 1 through said at least one respective elastic pin (39', 39", 39''').

3. Modular construction system (1) according to claim 2, characterized in that said plane of guide (10) is composed of a support plane (11) provided with a plurality of through openings guide - irons (13) and a plurality of seats of connection (15) suitable for enabling a link bound to said plane of guide (10) with one or more of said support brackets (30 ) .

4. Modular construction system (1) according to claim 2 or 3, characterized in that said bracket (37 37'', 37'¹') is equipped with at least one elastic pin (39', 39'', 39''') adapted to fit within one of said connection seats (15) of said guide plate (10) .

5. Modular construction system (1) according to claim 4, characterized in that said support bracket steel stirrups (30) comprises at least one means of connection (43) to a duct for transpiration resulting from said connection portion (31) through at least one opening end (45) .

6. Modular construction system (1) according to claim 5_, characterized in that said profile interlocking substantially "T" shaped (35', 35'', 35''') is provided with at least a removable tongue (47', 47'', 47''') along a precut line (49', 49'', 49' ' ' ) .