CN102979221B - Shear wall structure configured with crossed slant internal prestress and construction method of shear wall structure - Google Patents
Shear wall structure configured with crossed slant internal prestress and construction method of shear wall structure Download PDFInfo
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- CN102979221B CN102979221B CN201210518586.1A CN201210518586A CN102979221B CN 102979221 B CN102979221 B CN 102979221B CN 201210518586 A CN201210518586 A CN 201210518586A CN 102979221 B CN102979221 B CN 102979221B
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- 238000010276 construction Methods 0.000 title claims abstract description 23
- 239000004567 concrete Substances 0.000 claims abstract description 35
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 30
- 239000010959 steel Substances 0.000 claims abstract description 30
- 238000004873 anchoring Methods 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 238000009434 installation Methods 0.000 claims abstract description 5
- 230000003014 reinforcing Effects 0.000 claims description 29
- 239000010410 layers Substances 0.000 claims description 7
- 239000002184 metals Substances 0.000 claims description 7
- 239000002985 plastic film Substances 0.000 claims description 7
- 241000219843 Pisum Species 0.000 claims description 6
- 235000010582 Pisum sativum Nutrition 0.000 claims description 6
- 238000009415 formwork Methods 0.000 claims description 6
- 239000000463 materials Substances 0.000 claims description 6
- 239000004570 mortar (masonry) Substances 0.000 claims description 6
- 230000000717 retained Effects 0.000 claims description 6
- 210000003467 Cheek Anatomy 0.000 claims description 3
- 238000005056 compaction Methods 0.000 claims description 3
- 231100001004 fissures Toxicity 0.000 claims description 3
- 238000007654 immersion Methods 0.000 claims description 3
- 239000011513 prestressed concrete Substances 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 230000001360 synchronised Effects 0.000 claims description 3
- 238000005266 casting Methods 0.000 abstract 1
- 230000035515 penetration Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 7
- 230000002787 reinforcement Effects 0.000 description 6
- 239000011150 reinforced concrete Substances 0.000 description 4
- 238000005516 engineering processes Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000002045 lasting Effects 0.000 description 2
- 238000000034 methods Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
Abstract
Description
Technical field
The present invention relates to a kind of configuration and intersect the shear wall structure of oblique prestressing with bond and construction method thereof.
Background technology
Shear wall bears important component that is vertical and horizontal loading in Concrete Structures of Tall Building, and its stress and mechanical property directly determine supporting capacity and the structural safety of highrise building.Shear wall, under the acting in conjunction of the vertical load such as dead load, Live Loads on Floors in Buildings and the horizontal loading such as horizontal earthquake, wind load, will produce the principal tensile stress along Shear Walls body plane diagonal.Because the action direction of horizontal loading can change because of the change in wind direction, horizontal earthquake direction, therefore principal tensile stress all may occur in two diagonals of wall body plane.And in existing Design of Shear-wall Structure method, shear wall inside only configures the plain bars along wall body planar horizontal direction and vertical direction, layout orientation and the principal tensile stress functional orientation of horizontal reinforcement and vertical reinforcing bar are all inconsistent, and power transmission is not direct.Very easily there is the diagonal crack along wall body plane diagonal in shear wall concrete under principal tensile stress effect, and the reciprocal change along with horizontal loads direction is occurred the intersection diagonal crack along wall body plane two diagonals is also expanded gradually.The diagonal crack that intersects expands to and to a certain degree will cause the Stiffness Deterioration of shear wall afterwards, causes the reduction of shear wall supporting capacity.Under rarely occurred earthquake effect, diagonal crack widths increases rapidly, and the intersection diagonal crack sharply expanded not only seriously reduces the rigidity of shear wall, also can cause crack place level and vertical reinforcement yielding, shear wall finally will be caused to lose efficacy, badly influence the bearing safety of highrise building.For delaying appearance and the expansion of Shear Walls body concrete intersection diagonal crack, in existing shear walls design method, to the horizontal reinforcement in Shear Walls body and vertical reinforcing bar equal strict regulations minimum steel ratio and maximum rebar spacing, although improve ductility and the anti-seismic performance of shear wall structure to a certain extent, but eventually can not overcome the puzzlement that larger principal tensile stress causes wall body to ftracture, and in wall body, reinforcing bar is densely distributed, spacing is little, steel using amount is large, and can bring walls concrete vibrate construction difficulty.
Summary of the invention
The invention provides a kind of configuration and intersect the shear wall structure of oblique prestressing with bond and construction method thereof, improve the anti-seismic performance of shear wall.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme: a kind of configuration intersects the shear wall structure of oblique prestressing with bond, comprise Shear Walls body, Shear Walls body horizontal direction reinforcing bar and Shear Walls body vertical direction reinforcing bar is provided with in Shear Walls body, the upper left corner of Shear Walls body and the upper right corner arrange shear wall tooth plate respectively, shear wall tooth plate place is provided with prestressing force pull end ground tackle, the lower left corner of Shear Walls body and the lower right corner arrange prestressed anchor fixed end ground tackle respectively, be provided with between the prestressed anchor fixed end ground tackle at diagonal angle and prestressing force pull end ground tackle and intersect oblique prestressed strand and be arranged with the oblique prestress pipe of intersection outside the oblique prestressed strand of intersection, Shear Walls stature material is concrete, Shear Walls body horizontal direction reinforcing bar, Shear Walls body vertical direction bar material are plain bars, the oblique prestressed strand that intersects adopts high-strength prestressed steel wire bundle or steel wire bundle, the oblique prestress pipe that intersects adopts metal bellows, conduit peschel or plastic film capicitor, and prestressed anchor fixed end ground tackle, prestressing force pull end ground tackle adopt anchoring cone, bulb-end anchorage or intermediate plate anchor.
The oblique prestress pipe that intersects is retained in Shear Walls body template, ensures that its riding position is accurate by being connected with the colligation between wall body horizontal direction reinforcing bar, wall body vertical direction reinforcing bar.
The oblique prestressed strand lashing that intersects is positioned over and intersects in oblique prestress pipe.
Prestressed anchor fixed end ground tackle is retained in Shear Walls body template, is fixed on contiguous two corner positions in Shear Walls body bottom after shear wall concreting completes.
Shear wall tooth plate is the slotted eye that contiguous two corner positions places are reserved on Shear Walls body top, and the size of slotted eye matches with the prestressing force pull end ground tackle adopted.
Prestressing force pull end ground tackle is placed in shear wall tooth plate, completes also maintenance and carries out prestressed stretch-draw to during stretch-draw intensity, adopt pea gravel concreten cementation of fissures sealing off and covering anchorage after prestressed stretch-draw completes in shear wall tooth plate until shear wall concreting.
Configure and intersect the construction method of shear wall structure of oblique prestressing with bond, comprise following construction sequence:
(1) shear wall formwork, colligation wall body plain bars is set up
Shear wall concrete blinding is set up according to design size, comprise shear wall soffit formwork, side template, cheek board and shear wall tooth plate template, lay and colligation Shear Walls body plain bars, comprise wall body horizontal direction reinforcing bar, wall body vertical direction reinforcing bar, as this sheet shear wall is provided with side column, also should lay and colligation shear wall side column reinforcing bar;
(2) the oblique prestress pipe that intersects is arranged and is installed
The oblique prestress pipe of intersection is arranged along Shear Walls body diagonal, the oblique prestress pipe that intersects adopts metal bellows, conduit peschel or plastic film capicitor, according to diameter and the designing requirement of design-calculated prestressed strand, select the prestress pipe of suitable diameter, prestress pipe should be connected with the colligation of wall body plain bars, ensure the accurate positioning of pipeline, Pipe installing should ensure that unimpeded, linear smooth-going, the joint in its inside connects closely;
(3) prestressed strand lashing, prestressed anchor are installed
Prestressed strand lashing is carried out in the oblique prestress pipe of intersection, the oblique prestressed strand that intersects adopts high-strength prestressed steel wire bundle or steel wire bundle, at the lower left corner of Shear Walls body and the intersection in the lower right corner oblique prestressed strand bottom prestressed anchored end ground tackle, at the upper left corner of Shear Walls body and the intersection in the upper right corner oblique prestressed strand top prestressed stretching end ground tackle, prestressed anchor fixed end ground tackle, prestressing force pull end ground tackle adopts anchoring cone, bulb-end anchorage or intermediate plate anchor, the necessary position of anchorage installation is accurate, fixed, anchor plate must be mutually vertical with prestressed strand,
(4) shear wall concreting and maintenance
Shear wall concrete is built according to design grade, immersion vibrator is adopted to carry out concrete vibrating, guarantee concrete compaction, ensure the closely knit of anchor plate surrounding concrete, placement layer by layer mode is adopted, the concreting shaping rear maintenance plan adopting correspondence according to construction environment temperature and humidity when Shear Walls body is higher;
(5) prestressed stretch-draw, pipeline pneumatic mortar, end sealing off and covering anchorage
Shear wall concrete curing to meet designing requirement intensity, can prestressed stretch-draw be carried out after the length of time, prestressing force type is prestressing with bond, prestressed concrete techniqres is post stretching, pre-stress stretching method is tensioned at one end, suitable tensioning equipment is selected according to design-calculated degree of prestressing, intersect the synchronous grading tension of oblique prestressed strand to designing control stress for prestressing, tensioner puts the capable pipeline pneumatic mortar of Zhang Houjin, anchoring is carried out to stretching end prestressed strand termination, finally adopts pea gravel concreten to carry out end sealing off and covering anchorage to tooth plate position.
Beneficial effect of the present invention is:
(1) principal tensile stress in the Shear Walls body plane that causes of vertical and horizontal loading acting in conjunction is born by intersecting oblique prestressing with bond steel bundle, principal tensile stress action direction is consistent with the oblique prestressing with bond Strands Layout direction of intersection, power transmission directly, succinctly, efficiently, greatly reduce Shear Walls body and occur diagonally intersecting the possibility of diagonal crack, improve the anti-side rigidity of shear wall;
(2) after the oblique prestressing with bond steel bundle of configuration intersection, shear wall changes partial prestressing reinforced concrete structure into by ordinary reinforced concrete structure, this kind of structure wall body concrete under lasting design situation and frequently occurred earthquake design situation does not ftracture, shear wall rigidity is not degenerated, shear wall supporting capacity does not reduce, and can meet the every designing requirement of shear wall under serviceability limit state and ultimate limit states;
(3) under rarely occurred earthquake design situation, permission wall body concrete occurs crack but crack width is no more than prescribed limits, shear wall rigidity is degenerated not too much, and shear wall supporting capacity reduces not too much, can guarantee the bearing safety of shear wall structure under rarely occurred earthquake effect;
(4) method for stretching of oblique prestressing with bond steel Shu Caiyong one end anchoring, tensioned at one end is intersected, anchored end is positioned at contiguous two corner positions in wall body bottom, stretching end is positioned at contiguous two corner positions in wall body top, after stretch-draw completes and carries out end sealing off and covering anchorage to tooth plate, shear wall top is a plane, can proceed the construction of last layer shear wall;
(5) the oblique prestressed strand that intersects can adopt high-strength prestressed steel wire bundle, steel wire bundle, the oblique prestress pipe that intersects can adopt metal bellows, conduit peschel, plastic film capicitor, prestressed anchor fixed end ground tackle, prestressing force pull end ground tackle can adopt anchoring cone, bulb-end anchorage, intermediate plate anchor, above accessory is sizing specification product, and construction technology is ripe, construction technology is reliable, construction quality is easy to ensure;
(6) after the oblique prestressing with bond steel bundle of configuration intersection, the plain bars of alternative a part of wall body horizontal direction and vertical direction, the reinforcement ratio of plain bars can be reduced, increase plain bars bar spacing, be convenient to the concrete construction of vibrating of wall body, be conducive to improving the concrete pouring construction quality of wall body.
Accompanying drawing explanation
Fig. 1 is front view of the present invention;
Fig. 2 is top view of the present invention;
Fig. 3 is the A-A sectional view of Fig. 2;
Fig. 4 is the B-B sectional view of Fig. 1;
Fig. 5 is the C-C sectional view of Fig. 1.
Detailed description of the invention
Embodiment: as Figure 1-5, a kind of configuration intersects the shear wall structure of oblique prestressing with bond, comprise Shear Walls body 1, Shear Walls body horizontal direction reinforcing bar 7 and Shear Walls body vertical direction reinforcing bar 8 is provided with in Shear Walls body 1, the upper left corner of Shear Walls body 1 and the upper right corner arrange shear wall tooth plate 2 respectively, shear wall tooth plate 2 place is provided with prestressing force pull end ground tackle 6, the lower left corner of Shear Walls body 1 and the lower right corner arrange prestressed anchor fixed end ground tackle 5 respectively, be provided with between the prestressed anchor fixed end ground tackle 5 at diagonal angle and prestressing force pull end ground tackle 6 and intersect oblique prestressed strand 4 and be arranged with the oblique prestress pipe 3 of intersection outside the oblique prestressed strand 4 of intersection, Shear Walls body 1 material is concrete, Shear Walls body horizontal direction reinforcing bar 7, Shear Walls body vertical direction reinforcing bar 8 material are plain bars, the oblique prestressed strand 4 that intersects adopts high-strength prestressed steel wire bundle or steel wire bundle, the oblique prestress pipe 3 that intersects adopts metal bellows, conduit peschel or plastic film capicitor, and prestressed anchor fixed end ground tackle 5, prestressing force pull end ground tackle 6 adopt anchoring cone, bulb-end anchorage or intermediate plate anchor.The oblique prestress pipe 3 that intersects is retained in Shear Walls body template, ensures that its riding position is accurate by being connected with the colligation between wall body horizontal direction reinforcing bar, wall body vertical direction reinforcing bar.Prestressed anchor fixed end ground tackle 5 is retained in Shear Walls body template, is fixed on contiguous two corner positions in Shear Walls body 1 bottom after shear wall concreting completes.Shear wall tooth plate 2 is the slotted eye that contiguous two corner positions places are reserved on Shear Walls body 1 top, and the size of slotted eye matches with the prestressing force pull end ground tackle 6 adopted.Prestressing force pull end ground tackle 6 is placed in shear wall tooth plate, completes also maintenance and carries out prestressed stretch-draw to during stretch-draw intensity, adopt pea gravel concreten cementation of fissures sealing off and covering anchorage after prestressed stretch-draw completes in shear wall tooth plate until shear wall concreting.
Configure and intersect the construction method of shear wall structure of oblique prestressing with bond, comprise following construction sequence:
(1) shear wall formwork, colligation wall body plain bars is set up
Shear wall concrete blinding is set up according to design size, comprise shear wall soffit formwork, side template, cheek board and shear wall tooth plate template, lay and colligation Shear Walls body plain bars, comprise wall body horizontal direction reinforcing bar, wall body vertical direction reinforcing bar, as this sheet shear wall is provided with side column, also should lay and colligation shear wall side column reinforcing bar;
(2) the oblique prestress pipe that intersects is arranged and is installed
The oblique prestress pipe of intersection is arranged along Shear Walls body diagonal, the oblique prestress pipe that intersects adopts metal bellows, conduit peschel or plastic film capicitor, according to diameter and the designing requirement of design-calculated prestressed strand, select the prestress pipe of suitable diameter, prestress pipe should be connected with the colligation of wall body plain bars, ensure the accurate positioning of pipeline, Pipe installing should ensure that unimpeded, linear smooth-going, the joint in its inside connects closely;
(3) prestressed strand lashing, prestressed anchor are installed
Prestressed strand lashing is carried out in the oblique prestress pipe of intersection, the oblique prestressed strand that intersects adopts high-strength prestressed steel wire bundle or steel wire bundle, at the lower left corner of Shear Walls body and the intersection in the lower right corner oblique prestressed strand bottom prestressed anchored end ground tackle, at the upper left corner of Shear Walls body and the intersection in the upper right corner oblique prestressed strand top prestressed stretching end ground tackle, prestressed anchor fixed end ground tackle, prestressing force pull end ground tackle adopts anchoring cone, bulb-end anchorage or intermediate plate anchor, the necessary position of anchorage installation is accurate, fixed, anchor plate must be mutually vertical with prestressed strand,
(4) shear wall concreting and maintenance
Shear wall concrete is built according to design grade, immersion vibrator is adopted to carry out concrete vibrating, guarantee concrete compaction, ensure the closely knit of anchor plate surrounding concrete, placement layer by layer mode is adopted, the concreting shaping rear maintenance plan adopting correspondence according to construction environment temperature and humidity when Shear Walls body is higher;
(5) prestressed stretch-draw, pipeline pneumatic mortar, end sealing off and covering anchorage
Shear wall concrete curing to meet designing requirement intensity, can prestressed stretch-draw be carried out after the length of time, prestressing force type is prestressing with bond, prestressed concrete techniqres is post stretching, pre-stress stretching method is tensioned at one end, suitable tensioning equipment is selected according to design-calculated degree of prestressing, intersect the synchronous grading tension of oblique prestressed strand to designing control stress for prestressing, tensioner puts the capable pipeline pneumatic mortar of Zhang Houjin, anchoring is carried out to stretching end prestressed strand termination, finally adopts pea gravel concreten to carry out end sealing off and covering anchorage to tooth plate position.
The present invention is in the wall body of traditional common shear wall structure, along two diagonals of wall body plane, each configuration one group of prestressing with bond steel bundle, these two groups of prestressing with bond steel bundles intersect oblique layout orientation in diagonal in wall body plane, can directly bear and transmit the principal tensile stress in wall body that vertical and horizontal loading acting in conjunction causes.Intersect the existence of oblique prestressing with bond steel bundle, shear wall is made to change partial prestressing reinforced concrete structure into by ordinary reinforced concrete structure, by applying suitable prestressing force, make wall body concrete be in pressured state all the time under lasting design situation and frequently occurred earthquake design situation, can guarantee that wall body concrete does not ftracture under wind load and fortification intensity geological process; Under rarely occurred earthquake effect, because principal tensile stress is born primarily of the oblique prestressing with bond steel bundle of intersection, even if therefore there is crack but crack width can not exceed the limit value of regulation in wall body concrete, thus play and guarantee that shear wall rigidity is degenerated not too much, the effect that load-carrying properties reduce not too much, has ensured the bearing safety of highrise building under rarely occurred earthquake effect.Intersect the existence of oblique prestressing with bond steel bundle, also can reduce the reinforcement ratio of horizontal reinforcement and vertical reinforcing bar in wall body, reduce walls concrete and to vibrate the difficulty of construction, improve the construction quality of walls concrete.
Claims (6)
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210518586.1A CN102979221B (en) | 2012-12-06 | 2012-12-06 | Shear wall structure configured with crossed slant internal prestress and construction method of shear wall structure |
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| CN201210518586.1A CN102979221B (en) | 2012-12-06 | 2012-12-06 | Shear wall structure configured with crossed slant internal prestress and construction method of shear wall structure |
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| CN102979221B true CN102979221B (en) | 2015-03-25 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104264725A (en) * | 2014-09-02 | 2015-01-07 | 杭永山 | Post-tensioning prestressing reinforcement method for preventing lock chamber wall from cracking |
| CN104294965B (en) * | 2014-10-17 | 2017-02-01 | 浙江大学宁波理工学院 | Shear wall and construction method thereof |
| CN104314313B (en) * | 2014-11-06 | 2016-06-08 | 中国海洋石油总公司 | The establishment method of a kind of concrete exterior wall pre-stress system |
| CN105133726A (en) * | 2015-09-25 | 2015-12-09 | 郑州大学 | Assembled monolithic concrete frame structure system and frame shear structure system formed by assembled monolithic concrete frame structure system |
| CN110409664A (en) * | 2019-07-24 | 2019-11-05 | 中国十七冶集团有限公司 | A kind of pre-stressed steel plate concrete shear wall structure |
| CN110595728A (en) * | 2019-09-02 | 2019-12-20 | 中国航空工业集团公司沈阳飞机设计研究所 | Pre-stress technology-based flutter model and design method thereof |
| CN110878609A (en) * | 2019-12-03 | 2020-03-13 | 上海宝冶集团有限公司 | Construction method of unbonded prestressed waffle slab |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1455063A (en) * | 2002-04-30 | 2003-11-12 | 邱则有 | Shear wall module |
| CN1455064A (en) * | 2002-04-30 | 2003-11-12 | 邱则有 | Cast-in-situ reinforced concrete combined wall |
| CN1804264A (en) * | 2006-01-18 | 2006-07-19 | 北京工业大学 | Profiled short-pier shear wall with rung steel bar support |
| CN100999920A (en) * | 2007-01-05 | 2007-07-18 | 北京工业大学 | Tricontrolling type hiding spar concrete composite shear wall and mfg. method thereof |
| CN202990170U (en) * | 2012-12-06 | 2013-06-12 | 郑州大学 | Shear wall structure collocating cross oblique internal prestress |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7140155B1 (en) * | 2003-09-15 | 2006-11-28 | Robert Nasimov | Joints for constructing a shear wall |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1455063A (en) * | 2002-04-30 | 2003-11-12 | 邱则有 | Shear wall module |
| CN1455064A (en) * | 2002-04-30 | 2003-11-12 | 邱则有 | Cast-in-situ reinforced concrete combined wall |
| CN1804264A (en) * | 2006-01-18 | 2006-07-19 | 北京工业大学 | Profiled short-pier shear wall with rung steel bar support |
| CN100999920A (en) * | 2007-01-05 | 2007-07-18 | 北京工业大学 | Tricontrolling type hiding spar concrete composite shear wall and mfg. method thereof |
| CN202990170U (en) * | 2012-12-06 | 2013-06-12 | 郑州大学 | Shear wall structure collocating cross oblique internal prestress |
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