CN103291082A - Wood beam reinforcing body external pre-stress construction method - Google Patents
Wood beam reinforcing body external pre-stress construction method Download PDFInfo
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- CN103291082A CN103291082A CN2013102690469A CN201310269046A CN103291082A CN 103291082 A CN103291082 A CN 103291082A CN 2013102690469 A CN2013102690469 A CN 2013102690469A CN 201310269046 A CN201310269046 A CN 201310269046A CN 103291082 A CN103291082 A CN 103291082A
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Abstract
The invention discloses a wood beam reinforcing body external pre-stress construction method, belonging to the technical field of wood structure reinforcing. The wood beam reinforcing body external pre-stress construction method is characterized by comprising the following steps of: designing a shape of an external cable of an external pre-stress adapted to a shape which needs to complement a torque of a wood beam, determining an external cable arrangement way based on the shape of the external cable, determining an anchoring position according to the external cable arrangement way and steering the position; manufacturing an anchoring block and a steering block; installing the anchoring block and the steering block; installing the anchoring block at the anchoring position, and installing the steering block at the steering position; stretching-drawing a pre-stress cable, and stretching-drawing the pre-stress cable on the anchoring block and the steering block. The wood beam reinforcing body external pre-stress construction method can avoid damaging an original structure efficiently, and is convenient and simple in construction, relatively low in cost and wide in an application range.
Description
Technical field
The invention provides a kind of method that adopts the external prestressing strengthening wooden frame, belong to wooden construction reinforcing technique field.
Background technology
Timber is as a kind of natural materials, can produce certain birth defect in the process of growth, such as rotten, damage by worms, knaur etc.; Wooden construction can cause the structural damage accumulation under the complicated load action and under the influence of other various unfavorable external factors, and the physico-mechanical properties of structure is degenerated, thereby need by some effective measures, make damaged structure recover original structure function, perhaps improve its structure reactance on the basis of existing structure, to satisfy the functional requirement of structure under the new service condition.
At present, the reinforcement means of traditional wooden construction mainly contains: establish the diagonal brace method, add the nail method, screw bolt reinforcing method, filleting add hoop method, additional method of section, steel bonding (aluminium) plate method and add a plate method.In addition, in order to solve the problems of crack that weathering, rotten, insect pest etc. cause, normal applied chemistry grouting, local replacing method, additional member method and repair reinforcement.These reinforcement means can play provisional reinforcing repair, prolong the useful life of building, but are difficult to accomplish thorough maintenance.Tradition repairerment method focuses on repairing, and does not only have the complete scientific method of a cover by rule of thumb.For wooden frame, the normal employing increases the wooden frame cross section or measure such as bright post is set under beam in the engineering, and to satisfy instructions for use, the former increases consumption of wood, after the floor space utilization rate is descended.
At the wooden frame that the direct affixing carbon fabric in wooden frame surface is reinforced, bearing capacity is improved to some extent, and deformation performance improves, but considers the mechanical property of timber itself, and the effect of directly pasting fiber reinforced material is unsatisfactory.This is a kind of passive reinforcement means, fails effectively to reduce the mid-span deflection of wooden frame.After fibrous material is pasted on wooden frame surface and apply prestressing force, can reduce the distortion of wooden frame to a great extent, but construction is complicated, and to the requirement of cementing agent than higher.
Adopt the prestressing without bondn high strength steel strand that the inside of wooden frame is applied the stress performance that prestressing force can effectively improve timber compoment.This method is applicable to newly-built structure, is not suitable for existing wooden frame is reinforced reparation.
Summary of the invention
Technical problem to be solved by this invention is the deficiency that exists at prior art, and provide a kind of reinforcing wood beam method that cohesive body arranges prestressed cable outward of not having, can effectively avoid damaging original structure, it is simple and convenient to construct, the reinforcing expense is lower, wide application, applicable to the reinforcing of various ancient building different size wooden frames, convenience is overhauled and can significantly effectively be improved the wooden frame bearing capacity.
For achieving the above object, technical scheme of the present invention is: a kind of wooden frame is reinforced the external prestressing job practices, it is characterized in that, comprises the steps:
1) shape of design and the external tendon that need supply the external prestressing that wooden frame moment of flexure figure fits is mutually determined the external tendon arrangement according to the shape of external tendon, determines anchorage point by the external tendon arrangement, steering position;
2) make anchor block and steering block:
3) anchor block, steering block is installed: anchor block is installed in anchorage point, steering block is installed in steering position;
4) prestressed cable stretch-draw: stretch-draw prestressing force rope on described anchor block and steering block.
The concrete steps of described making anchor block and steering block are as follows:
2.1) the wooden frame surfacing: according to the position, beam surface of the position correspondence of anchor block and steering block, chipping is carried out on the surface, installation position, repair and handle, measure beam body width and the height of the position correspondence of anchor block and steering block;
2.2) make anchor block and steering block according to correspondingly-sized: the spacing of determining two steel clamping plate of anchor block according to the wooden frame width; Determine the length of steel clamping plate according to the requirement of pitch of bolts; Maximum pull according to presstressed reinforcing steel designs the size of anchor end plate and the fusion length of stiffener; According to the width of the maximum pressure of steering block and wooden frame design steering block cushion block, determine steering block rod iron length according to the wooden frame width;
Described steel clamping plate are connected anchorage point by bolt, and described anchor end plate is welded on the described steel clamping plate.
Described external tendon is two, the both sides that are arranged on wooden frame of symmetry.
Anchor block adopts the mode anchoring of termination anchor.
Steering block is to adopt nail to connect with being connected of wooden frame.
Compared with prior art, the advantage that the present invention has is: it is simple and convenient to construct, and the reinforcing expense is lower, wide application, and applicable to the reinforcing of various ancient building different size wooden frames, convenience is overhauled and can significantly effectively be improved the wooden frame bearing capacity.
Description of drawings
Fig. 1 is the schematic diagram of one of external tendon exemplary configurations mode " straight string formula line style ".
Fig. 2 is the schematic diagram of two " single broken-line type line styles " of external tendon exemplary configurations mode.
Fig. 3 is the schematic diagram of three " dual slope formula line styles " of external tendon exemplary configurations mode.
Fig. 4 is the schematic diagram that is installed in after anchor block and steering block complete on the wooden frame.
Fig. 5 is the A-A sectional drawing of Fig. 4 anchor block.
Fig. 6 is the B-B sectional drawing of Fig. 4 steering block.
Fig. 7 is pier nose ground tackle schematic diagram.
Among the figure: 1, wooden frame, 2, prestressed cable, 3, anchor block, 31, the steel clamping plate, 32, the anchor end plate, 33, stiffener, 4, steering block, 41, the steering block cushion block, 42, the steering block rod iron, 5, bolt hole, 6, nut, 7, screw rod, 8, pier nose.
The specific embodiment
Below with reference to Figure of description, specific embodiments of the invention are made further instructions:
Intend reinforcing wood beam and be of a size of 150*300*4000mm, in girder span 1/3rd, equivalent point load is born at 2/3rds places.
1) the moment of flexure figure supplied of the shape Ying Yuxu of the external tendon of external prestressing is close.The prestressed cable line style is got two-fold line style (Fig. 3), adopts two zinc-plated round steel wires of 7mm as prestressed cable 2, is arranged in wooden frame 1 both sides in pairs.Arrange anchor block 3 accordingly at the beam two ends, in girder span 1/3rd, 2/3rds is the position of steering block 4;
2) make anchor block 3 and steering block 4:
2.1) the wooden frame surfacing: according to the position, beam surface of the position correspondence of anchor block 3 and steering block 4, chipping is carried out on the surface, installation position, repair and handle.
2.2) make anchor block and steering block: adopt the Q235 steel, the 10mm thick steel products is made.Get steel clamping plate 31 according to the wooden frame height and be of a size of 250*370mm, adopt the Churn drill punching on the steel clamping plate 31, totally 2 arrange, 3 of every rows, bore dia 22mm is with round and pitch of holes 160mm.According to the wooden frame width, the spacing of determining two steel clamping plate 31 of anchor block is 150mm.Anchor end plate 32 sectional dimensions are 10*80mm, punch at the center proper height, aperture 30mm, stiffener 33 sectional dimensions are 10*120mm, two stiffener 33 spacing 40mm, balanced welding is two side positions on anchor end plate 32, stiffener 33 and the 32 vertical welding of anchor end plate, and anchor end plate 32 and stiffener 33 be high 80mm all.For being complementary with angle wire, stiffener 33 is from the horizontal by 8.9 ° of oblique steering blocks.The wide 60mm of steering block cushion block 41, long 150mm, the steering block rod iron 42 long 270mm that get, both adopt welding reliably to connect.
3) ground tackle moulding: compressor wire is taked the anchorage style of pier nose anchor, and anchored end is welded on the anchor end plate 32 of wooden frame both sides, but because timber is inflammable, thereby when welding should be away from wooden frame;
4) wooden frame boring, clear hole: determine bore position according to anchor block steel clamping plate 31 crab-bolt positions, eject with the line of ink marker; The boring of employing Churn drill will guarantee in the boring procedure that drill bit is vertical with the wooden frame contact surface, can adopt hair-dryer cleaning eye road wood chip;
5) anchor block, steering block is installed: the connection between the steel clamping plate 31 is that plain bolt connects, and plain bolt is to adopt the Q235 steel; Steel clamping plate 31 bolts hole and wooden frame end bolt hole are aligned, and employing is that plain bolt connects, and wears that available wooden or rubber hammer beats bolt in the bolt process; The steering block backing plate is to adopt nail to connect with being connected of wooden frame, and nail adopts common nail.
6) prestressed cable stretch-draw: steel wire adopts pier nose anchor mode to be anchored on 10.9 grades of high-strength bolts of perforation.The strength and stiffness of high-strength bolt satisfy the requirement of a 7mm steel wire pier nose anchor.What high-strength bolt adopted is the 45# steel, and heat-treats after making, and has improved intensity.Steel wire is anchored on the high-strength bolt of perforation after walking around steering block rod iron 42 by the anchored end order.Steel wire prestressing force applies and by torque spanner nut is applied moment of torsion and realize.
Claims (6)
1. a wooden frame is reinforced the external prestressing job practices, it is characterized in that, comprises the steps:
1) shape of design and the external tendon that need supply the external prestressing that wooden frame moment of flexure figure fits is mutually determined the external tendon arrangement according to the shape of external tendon, determines anchorage point by the external tendon arrangement, steering position;
2) make anchor block and steering block:
3) anchor block, steering block is installed: anchor block is installed in anchorage point, steering block is installed in steering position;
4) prestressed cable stretch-draw: stretch-draw prestressing force rope on described anchor block and steering block.
2. wooden frame according to claim 1 is reinforced the external prestressing job practices, it is characterized in that the concrete steps of described making anchor block and steering block are as follows:
2.1) the wooden frame surfacing: according to the position, beam surface of the position correspondence of anchor block and steering block, chipping is carried out on the surface, installation position, repair and handle, measure beam body width and the height of the position correspondence of anchor block and steering block;
2.2) make anchor block and steering block according to correspondingly-sized: the spacing of determining two steel clamping plate of anchor block according to the wooden frame width; Determine the length of steel clamping plate according to the requirement of pitch of bolts; Maximum pull according to presstressed reinforcing steel designs the size of anchor end plate and the fusion length of stiffener; According to the width of the maximum pressure of steering block and wooden frame design steering block cushion block, determine steering block rod iron length according to the wooden frame width.
3. wooden frame according to claim 2 is reinforced the external prestressing job practices, it is characterized in that described steel clamping plate are connected anchorage point by bolt, and described anchor end plate is welded on the described steel clamping plate.
4. wooden frame according to claim 1 is reinforced the external prestressing job practices, it is characterized in that described external tendon is two, the both sides that are arranged on wooden frame of symmetry.
5. wooden frame according to claim 1 is reinforced the external prestressing job practices, it is characterized in that, anchor block adopts the mode anchoring of termination anchor.
6. wooden frame according to claim 1 is reinforced the external prestressing job practices, it is characterized in that, steering block is to adopt nail to connect with being connected of wooden frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2013102690469A CN103291082A (en) | 2013-07-01 | 2013-07-01 | Wood beam reinforcing body external pre-stress construction method |
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| CN2013102690469A CN103291082A (en) | 2013-07-01 | 2013-07-01 | Wood beam reinforcing body external pre-stress construction method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104675017A (en) * | 2015-03-06 | 2015-06-03 | 东北林业大学 | Novel pre-stressed continuous bamboo-wood beam popularizing device |
| CN105386608A (en) * | 2015-04-23 | 2016-03-09 | 罗晓晖 | Anchor rope type house protecting method |
| CN105672661A (en) * | 2014-11-19 | 2016-06-15 | 东北林业大学 | Optimized application device for screw thread twisting prestress |
| CN109162480A (en) * | 2018-10-25 | 2019-01-08 | 山东省建筑科学研究院 | Tensioning external prestressing strengthening device and reinforcement means in the middle part of a kind of T plate |
| CN114319925A (en) * | 2022-01-10 | 2022-04-12 | 中南建筑设计院股份有限公司 | Reinforced wood structure beam and reinforcing method thereof |
| US20220178158A1 (en) * | 2020-12-07 | 2022-06-09 | Fuzhou University | Device and method for reinforcing round section wood beam by combination of prestressed frp sheet and high strength steel wire rope |
| CN114922098A (en) * | 2022-05-07 | 2022-08-19 | 山东交通学院 | Stone arch bridge reinforcing device and method |
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| KR20060003972A (en) * | 2004-07-05 | 2006-01-12 | 강신량 | Reinfocing method for beam and girder using external post-tension and apparatus therefor |
| CN101173505A (en) * | 2007-11-22 | 2008-05-07 | 中国第一冶金建设有限责任公司 | Construction method for chamber type bridge maintaining external pre-stress |
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2013
- 2013-07-01 CN CN2013102690469A patent/CN103291082A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20060003972A (en) * | 2004-07-05 | 2006-01-12 | 강신량 | Reinfocing method for beam and girder using external post-tension and apparatus therefor |
| CN101173505A (en) * | 2007-11-22 | 2008-05-07 | 中国第一冶金建设有限责任公司 | Construction method for chamber type bridge maintaining external pre-stress |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105672661A (en) * | 2014-11-19 | 2016-06-15 | 东北林业大学 | Optimized application device for screw thread twisting prestress |
| CN104675017A (en) * | 2015-03-06 | 2015-06-03 | 东北林业大学 | Novel pre-stressed continuous bamboo-wood beam popularizing device |
| CN104675017B (en) * | 2015-03-06 | 2016-07-27 | 东北林业大学 | A kind of novel Prestressed Continuous bamboo wooden frame promotes device |
| CN105386608A (en) * | 2015-04-23 | 2016-03-09 | 罗晓晖 | Anchor rope type house protecting method |
| CN109162480A (en) * | 2018-10-25 | 2019-01-08 | 山东省建筑科学研究院 | Tensioning external prestressing strengthening device and reinforcement means in the middle part of a kind of T plate |
| US20220178158A1 (en) * | 2020-12-07 | 2022-06-09 | Fuzhou University | Device and method for reinforcing round section wood beam by combination of prestressed frp sheet and high strength steel wire rope |
| US11674323B2 (en) * | 2020-12-07 | 2023-06-13 | Fuzhou University | Device and method for reinforcing round section wood beam by combination of prestressed FRP sheet and high strength steel wire rope |
| CN114319925A (en) * | 2022-01-10 | 2022-04-12 | 中南建筑设计院股份有限公司 | Reinforced wood structure beam and reinforcing method thereof |
| CN114922098A (en) * | 2022-05-07 | 2022-08-19 | 山东交通学院 | Stone arch bridge reinforcing device and method |
| CN114922098B (en) * | 2022-05-07 | 2023-08-22 | 山东交通学院 | Stone arch bridge reinforcing device and method |
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Application publication date: 20130911 |