Cast-in-situ steel reinforced concrete haunched beam structure
The utility model relates to a kind of cast-in-situ steel reinforced concrete haunched beam structure, belongs to design of reinforced concrete structure and building technology field.
Monolithic reinforced concrete structure range of application is extremely wide, and cast-in-situ steel reinforced concrete beam is one of most important member in structure.Generally, reinforced concrete beam is often contour, when there is the situation that span is large or bearing load is larger, generally by increasing deck-molding, solves problem.While adopting the jowar such as conventional way employing to calculate and design, deck-molding is larger, and overall structure increases with material and deadweight, and cost is corresponding increase also.Present stage, more abundant in the research of application aspect conversion beam for haunched beam, part test result of study shows: the frame with haunch conversion beam props up short-shear wall structure and has good anti-seismic performance, and the hysteretic loop of its hysteresis loop is full, and skeleton curve descending branch is milder; Ductility meets the requirement that earthquake resistant code is greater than 4 to structure ductility coefficient completely; Each stiffness layer distributes more even, and in its elasticity and elastic and plastic deformation process, each layer of deformation performance is comparatively stable, has effectively overcome the weak phenomenon of bottom thin; Surrender mechanism is the ductile yield mechanism of " strong post, weak beam, stronger node " that energy dissipation is good.Extend thus, haunched beam also can play good effect in large-span frame structure.
Utility model content
Technical problem to be solved in the utility model is the defect that overcomes prior art, and a kind of cast-in-situ steel reinforced concrete haunched beam structure is provided, and is reducing the concrete amount of beam, is alleviating under the condition of dead load, and the ultimate load that can bear is larger.
For solving the problems of the technologies described above, the utility model provides a kind of cast-in-situ steel reinforced concrete haunched beam structure, comprise vertically disposed many frame columns, frame column top is by Vierendeel girder level connection joint, it is characterized in that, what frame column was connected with Vierendeel girder arranges beam support haunch region at cast-in-situ steel reinforced concrete beam support position, at the oblique reinforcing bar of haunch area configurations, forms mutual anchor with the reinforcing bar of reinforcing bar bottom in girder span.
Beam reinforced steel bar comprises reinforcing bar in reinforcing bar at the bottom of haunch place beam, girder span, and in girder span, at the bottom of the beam of reinforcing bar, at the bottom of reinforcing bar and haunch place beam, reinforcing bar forms mutual anchor.
At the bottom of beam in girder span in reinforcing bar, anchorage length of steel bar value is 40d, and d is bar diameter.
At the bottom of haunch place beam, to anchor into the anchorage length value in Vierendeel girder be 20d to reinforcing bar, and d is bar diameter.
The beneficial effect that the utility model reaches:
(1) concrete amount of minimizing beam;
(2) alleviate dead load, reduce geological process;
(3) ultimate load that haunched beam can bear increases;
(4) height in girder span is relatively little, is conducive to the laying of pipeline, has increased stud;
(5) simple structure, meets code requirement, safe and reliable;
(6) effectively control cost.
Accompanying drawing explanation
Fig. 1 is the floor map of the utility model embodiment cast-in-situ steel reinforced concrete haunched beam structure;
Fig. 2 is the utility model embodiment cast-in-situ steel reinforced concrete haunched beam structure section schematic diagram (being the A-A section in Fig. 1);
Wherein: 1 is frame column, 2 is Vierendeel girder, and 3 is beam support haunch region, and 4 is reinforcing bar at the bottom of haunch place beam, and 5 is reinforcing bar in girder span.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is further described.Following examples are only for the technical solution of the utility model is more clearly described, and can not limit protection domain of the present utility model with this.
As depicted in figs. 1 and 2, comprise vertically disposed many frame columns 1, frame column 1 top is by Vierendeel girder 2 level connection joints, what frame column 1 was connected with Vierendeel girder 2 arranges beam support haunch region 3 at cast-in-situ steel reinforced concrete beam support position, configuration haunch region 3 oblique reinforcing bar and and girder span in reinforcing bar 5 lower rebar form mutual anchor, realized increase bearing bending resistant section.
Cast-in-situ steel reinforced concrete haunched beam structure work progress is as follows:
First setting up flooring supports, lay beam-slab template, stay and establish haunch region 3, secondly colligation beam reinforced steel bar, comprise reinforcing bar 4 at the bottom of haunch place beam, reinforcing bar 5 location in girder span, and it is as follows to notice that beam reinforced steel bar anchoring requires: in girder span, at the bottom of the beam of reinforcing bar 5, at the bottom of reinforcing bar and haunch place beam, reinforcing bar 4 forms mutual anchor, at the bottom of haunch place beam, reinforcing bar 4 anchors in frame column 1 and Vierendeel girder 2, wherein, at the bottom of beam in girder span in reinforcing bar 5, anchorage length of steel bar value is that 40d(d is bar diameter), at the bottom of haunch place beam, to anchor into the anchorage length value in Vierendeel girder 2 be 20d to reinforcing bar 4, top surface of the beam reinforcing bar is arranged by normal mode, last concreting.
Take the method to beam support position haunch, increased the depth of section of bearing, beam support position arrangement of reinforcement under the effect of hogging moment is reduced; Meeting under the prerequisite of internal force calculating, effectively reduced concrete amount on the one hand, alleviated dead load, make on the other hand the matching of section forms of beam and internal force (moment of flexure) figure, given full play to the effect of each position reinforcing bar.Realized the lightly object of attractive in appearance, economical rationality of longspan structure.And make the height in girder span relatively little, be conducive to the laying of pipeline, increased building stud.
The above is only preferred embodiment of the present utility model; should be understood that; for those skilled in the art; do not departing under the prerequisite of the utility model know-why; can also make some improvement and distortion, these improvement and distortion also should be considered as protection domain of the present utility model.