CN111335500A - Assembly type sandwich self-heat-preservation double-sided overlapped energy-consumption enclosing wall plate and construction method thereof - Google Patents
Assembly type sandwich self-heat-preservation double-sided overlapped energy-consumption enclosing wall plate and construction method thereof Download PDFInfo
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- CN111335500A CN111335500A CN202010014121.7A CN202010014121A CN111335500A CN 111335500 A CN111335500 A CN 111335500A CN 202010014121 A CN202010014121 A CN 202010014121A CN 111335500 A CN111335500 A CN 111335500A
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- 238000004321 preservation Methods 0.000 title claims abstract description 35
- 238000005265 energy consumption Methods 0.000 title claims abstract description 23
- 238000010276 construction Methods 0.000 title claims abstract description 17
- 239000010410 layer Substances 0.000 claims abstract description 24
- 239000011381 foam concrete Substances 0.000 claims abstract description 18
- 238000009413 insulation Methods 0.000 claims abstract description 16
- 239000012792 core layer Substances 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 37
- 239000010959 steel Substances 0.000 claims description 37
- 230000003014 reinforcing effect Effects 0.000 claims description 31
- 239000004567 concrete Substances 0.000 claims description 23
- 230000002787 reinforcement Effects 0.000 claims description 19
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 230000021715 photosynthesis, light harvesting Effects 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 8
- 238000010521 absorption reaction Methods 0.000 abstract 2
- 239000006185 dispersion Substances 0.000 abstract 1
- 230000035939 shock Effects 0.000 abstract 1
- 238000004873 anchoring Methods 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011178 precast concrete Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229920002748 Basalt fiber Polymers 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H17/00—Fencing, e.g. fences, enclosures, corrals
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Electromagnetism (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Acoustics & Sound (AREA)
- Building Environments (AREA)
Abstract
The invention relates to an assembled sandwich self-heat-insulation double-sided overlapped energy-consumption enclosure wall board and a construction method thereof, wherein the self-heat-insulation double-sided overlapped energy-consumption enclosure wall board comprises: prefabricated outer leaf coincide wallboard, prefabricated inner leaf coincide wallboard, heat preservation sandwich layer wall, first rubber pad and second rubber pad. The invention utilizes the self heat preservation and insulation performance of the foam concrete in the heat preservation core layer to realize the heat preservation and insulation performance of the wall piece, and simultaneously utilizes the advantage of low elasticity and shock absorption of the foam concrete to be matched with the rubber pads arranged on the prefabricated wall board, so that the wall body has good deformation performance and good absorption and dispersion effects on impact load, thereby improving the anti-seismic performance of the structure.
Description
Technical Field
The invention relates to the field of buildings, in particular to an assembly type sandwich self-insulation double-sided overlapped energy-consumption enclosure wall board and a construction method thereof.
Background
With the continuous development of the urbanization construction of China, the number of buildings in cities of China is increased day by day, the problem of energy consumption in the buildings is more serious, and the research, application and popularization of the building energy-saving technology are imperative. At present, the heat preservation enclosure wall body of common use among the building engineering divide into interior heat preservation, outer heat preservation and precast concrete sandwich heat preservation wall body (sandwich heat preservation wallboard) three kinds, interior heat preservation exists the inside heat preservation of heat preservation wall body and easily damages, receive interior decoration to influence big scheduling problem, outer heat preservation exists comparatively serious fire prevention and durability problem, mostly be the sandwich layer among the precast concrete sandwich heat preservation wall body and set up the heated board, not only great and the huge difference of heated board and concrete two kinds of material properties will lead to both to warp uncoordinated, the drawback that atress performance is poor in coordination.
On the other hand, along with the development and popularization of the fabricated building, the earthquake-resistant safety problem of the fabricated building becomes more important, the constraint effect and the additional rigidity of the common filler wall can possibly have adverse effects on the earthquake-resistant performance of the structure, and how to effectively ensure the service performance of the wall panel and give consideration to the structural performance of the wall panel is a big problem in the current fabricated structure research.
Disclosure of Invention
Aiming at the problems in the existing wall structure, the assembled sandwich self-insulation double-sided overlapped energy-dissipation enclosing wall plate which can integrate enclosing and anti-seismic energy dissipation and the construction method thereof are provided.
The specific technical scheme is as follows:
an assembled sandwich self-insulating double-sided overlapping energy-dissipating wall panel has the following characteristics that: prefabricated outer leaf coincide wallboard, prefabricated inner leaf coincide wallboard, heat preservation sandwich layer wall, four first rubber pads and four second rubber pads, heat preservation sandwich layer wall is located between prefabricated outer leaf coincide wallboard and the prefabricated inner leaf coincide wallboard, be equipped with outer leaf reinforcing bar net in the prefabricated outer leaf coincide wallboard, be equipped with inner leaf reinforcing bar net in the prefabricated inner leaf coincide wallboard, be equipped with the steel bar truss in the heat preservation sandwich layer wall, outer leaf reinforcing bar net passes through the steel bar truss with inner leaf reinforcing bar net and is connected and form integral steel reinforcement cage, around prefabricated outer leaf coincide wallboard is located in first rubber pad correspondence, around prefabricated inner leaf coincide wallboard is located in the second rubber pad correspondence, first rubber pad and second rubber pad are all connected on the steel bar net.
The self-heat-insulation double-sided overlapped energy-consumption wall panel with the fabricated sandwich also has the characteristic that the structure and the arrangement of the steel bar truss meet the design requirements of the specification.
The self-heat-insulation double-sided overlapped energy-consumption enclosure wall board with the fabricated sandwich core is further characterized in that the heat-insulation sandwich wall is formed by pouring foam concrete.
The prefabricated external leaf superposed wall board and the prefabricated internal leaf superposed wall board are both formed by pouring common concrete, and the thickness of the prefabricated external leaf superposed wall board and the prefabricated internal leaf superposed wall board is 50-100 mm; the heat-insulating core layer wall is of a cast-in-place structure, the thickness of the heat-insulating core layer wall is 50mm-100mm, foam concrete with different dry density grades and heat conductivity coefficients can be designed and selected according to environmental conditions, and meanwhile, the strength of the foam concrete is not low.
In the invention, basalt fiber wires can be wound on the outer surface of the steel bar truss, and a PE polyethylene plastic lantern ring is sleeved outside the steel bar truss to block the transfer of cold and hot bridges.
The invention effectively connects the core wall with the upper layer structure and the lower layer structure by using the vertical connecting steel bar in the connecting core wall, and integrally pours the core wall with the floor to form an integral structure, and the anchoring length of the steel bar is not less than 1.2laETo ensure the effective connection of the wall board and the main structure.
The wall board is not connected with the main structure of the same layer so as to reduce the constraint effect of the wall board on the structure.
According to the invention, the wallboard is effectively connected with the upper and lower main structures by using the vertical connecting steel bars in the post-cast foam concrete core layer, so that the wallboard can deform along with the upper and lower structures. According to the invention, the anchoring length of the connecting ribs is optimized, so that the anchoring effect can be disabled when the earthquake intensity is increased, and the constraint effect on the structure is finally and completely released, so that the self earthquake resistance of the structure is not influenced, and the damage mode of the structure is not changed.
The rubber pad is arranged to reduce the rigidity constraint effect of the wallboard on the structure and effectively improve the deformation capacity of the prefabricated wallboard; the rubber pad of the present invention may also be arranged so that when the host structure encounters an earthquake, the relative movement of the wall panels may be driven by the relative displacement of the structural layers, thereby dissipating the seismic energy input into the structure through the shearing action between the wall panels.
According to the invention, by combining the characteristic that the foam concrete material has low elastic modulus besides the functional advantages of heat preservation, heat insulation, sound insulation and the like, the self-heat-preservation double-sided overlapped energy-consumption wall panel has strong integral deformation capability under the action of an earthquake, so that the self-heat-preservation double-sided overlapped energy-consumption wall panel can dissipate more earthquake energy on the premise of not influencing the stress characteristic of the main structure while realizing the functional effects of heat preservation, heat insulation, sound insulation and the like of the maintenance wall, thereby protecting the main structure, forming a first earthquake-resistant defense line of the main structure and effectively improving the earthquake-resistant performance of the main structure.
The second aspect of the invention provides a construction method of an assembled sandwich self-heat-preservation double-surface-superposition energy-consumption enclosing wall plate, which is characterized by comprising the following steps:
binding and manufacturing an inner leaf reinforcing mesh and an outer leaf reinforcing mesh, and connecting and binding the inner leaf reinforcing mesh and the outer leaf reinforcing mesh through a reinforcing steel truss to form a shear wall reinforcing framework;
step two, placing the steel reinforcement framework obtained in the step one on a pouring die table, fixing, correspondingly arranging a first rubber pad and a second rubber pad on the upper side and the lower side of a steel reinforcement cage, connecting the first rubber pad to an outer leaf steel mesh and enclosing the first rubber pad to form a ring shape, connecting the second rubber pad to an inner leaf steel mesh and enclosing the second rubber pad to form a ring shape, pouring outer leaf concrete and embedding the outer leaf steel mesh in the outer leaf concrete, turning the wall body for 180 degrees after the outer leaf concrete reaches a certain strength and moving the wall body to another pouring die table, pouring inner leaf concrete and embedding the inner leaf steel mesh in the inner leaf concrete, and removing the die after the outer leaf concrete and the inner leaf concrete reach a certain strength to obtain the double-faced laminated energy-dissipating wall board;
step three, conveying the double-sided superposed energy-consumption wall board obtained in the step two to a construction site, splicing the double-sided superposed energy-consumption wall board according to requirements, effectively connecting the double-sided superposed energy-consumption wall board with an upper layer structure and a lower layer structure by using vertical connecting steel bars, and pouring core layer foam concrete to obtain the self-heat-preservation double-sided superposed energy-consumption enclosure wall board;
and step four, after the foam concrete of the core layer reaches a certain strength, the upper structure construction operation can be carried out.
Drawings
Fig. 1 is an assembly structure schematic diagram of an assembly type sandwich self-insulation double-sided overlapping energy-dissipating enclosure panel provided in an embodiment of the invention.
In the drawings: 1. prefabricating an outer leaf superposed wallboard; 2. prefabricating an inner leaf overlapped wallboard; 3. a heat-insulating core wall; 4. a first rubber pad; 5. an outer leaf reinforcement mesh; 6. inner leaf reinforcing mesh; 7. a steel bar truss; 9. connecting reinforcing steel bars; 10. an upper layer structure; 11. a lower layer structure; 12. and a second rubber pad.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
As shown in fig. 1, the assembly type sandwich self-insulation double-sided overlapping energy-consumption wall panel provided by the invention comprises: prefabricated outer leaf coincide wallboard 1, prefabricated inner leaf coincide wallboard 2, heat preservation sandwich layer wall 3, first rubber pad 4 and second rubber pad 12, heat preservation sandwich layer wall 3 is located between prefabricated outer leaf coincide wallboard 1 and the prefabricated inner leaf coincide wallboard 2, be equipped with outer leaf reinforcing bar net 5 in the prefabricated outer leaf coincide wallboard 1, be equipped with inner leaf reinforcing bar net 6 in the prefabricated inner leaf coincide wallboard 2, be equipped with steel bar truss 7 in the heat preservation sandwich layer wall 3, outer leaf reinforcing bar net 5 passes through steel bar truss 7 with inner leaf reinforcing bar net 6 and is connected and form integral steel reinforcement cage. According to the invention, the first rubber pad 4 and the second rubber pad 12 are correspondingly arranged on the periphery of the prefabricated outer leaf superposed wallboard 1 and the prefabricated inner leaf superposed wallboard 2, so that the deformation capacity of the prefabricated wallboard is effectively improved.
The heat-insulating core layer wall 3 of the invention should select the foam concrete with corresponding thermal performance according to the environmental conditions, and the quality of the foam concrete meets the requirements of the foam concrete application technical specification (JGJT 341-2014) and the foam concrete specification (JGT 266-2011); the outer leaf reinforcing mesh 6 and the inner leaf reinforcing mesh 7 are formed by binding horizontal distribution reinforcing steel bars and longitudinal distribution reinforcing steel bars, and the horizontal distribution reinforcing steel bars and the longitudinal distribution reinforcing steel bars are arranged according to the structural requirements and meet the requirements of the technical Standard of fabricated concrete construction (GBT 51231-; the arrangement of the first steel bar truss 13 in the invention should meet the requirements of technical Standard for fabricated concrete construction (GBT 51231-; the anchoring length of the second connecting steel bar 9 in the invention should meet the requirements of the technical Standard for fabricated concrete buildings (GBT 51231-.
The construction method of the assembly type sandwich self-heat-preservation double-sided superposed energy-consumption enclosing wall plate comprises the following steps:
step one, binding and manufacturing an inner leaf reinforcing mesh 6 and an outer leaf reinforcing mesh 5, and connecting and binding the inner leaf reinforcing mesh 6 and the outer leaf reinforcing mesh 5 through a reinforcing truss 7 frame to form a shear wall reinforcing framework;
step two, placing the steel reinforcement framework obtained in the step one on a pouring die table, fixing, arranging a first rubber pad 4 and a second rubber pad 12 on the upper side and the lower side of a steel reinforcement cage, connecting the first rubber pad 4 to an outer leaf steel reinforcement mesh 5 and enclosing to form a ring shape, connecting the second rubber pad 12 to an inner leaf steel reinforcement mesh 6 and enclosing to form a ring shape, pouring outer leaf concrete into a ring-shaped structure formed by enclosing the first rubber pad 4 and embedding the outer leaf steel reinforcement mesh 5 into the ring-shaped structure, turning over the wall body by 180 degrees after the outer leaf concrete reaches a certain strength and moving the wall body to another pouring die table, pouring inner leaf concrete into a ring-shaped structure formed by enclosing the second rubber pad 12 and embedding the inner leaf steel reinforcement mesh 6 into the ring-shaped structure, and removing the die to obtain the double-faced superposed energy-dissipating wall panel after the outer leaf concrete and the inner leaf concrete both reach a certain strength;
step three, conveying the double-sided superposed energy-consumption wall board obtained in the step two to a construction site, splicing the wall board according to requirements, effectively connecting the wall board with an upper layer structure 10 and a lower layer structure 11 by using vertical connecting steel bars 9, and pouring core layer foam concrete to obtain the self-heat-preservation double-sided superposed energy-consumption enclosure wall board;
and step four, after the foam concrete of the core layer reaches a certain strength, the upper structure construction operation can be carried out.
The thickness of the prefabricated external leaf superposed wallboard 1 can be the same as that of the first rubber pad 4; the thickness of the prefabricated inner leaf overlapped wallboard 2 is the same as that of the second rubber pad 12.
In the invention, the connecting steel bars 9 can be pre-buried when the lower layer structure 11 is poured.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (4)
1. The utility model provides a two-sided coincide of assembled core self preservation temperature power consumption dado which characterized in that includes: prefabricated outer leaf coincide wallboard, prefabricated inner leaf coincide wallboard, heat preservation sandwich layer wall, four first rubber pads and four second rubber pads, heat preservation sandwich layer wall is located prefabricated outer leaf coincide wallboard with between the prefabricated inner leaf coincide wallboard, be equipped with outer leaf reinforcing bar net in the prefabricated outer leaf coincide wallboard, be equipped with inner leaf reinforcing bar net in the prefabricated inner leaf coincide wallboard, be equipped with steel bar truss in the heat preservation sandwich layer wall, outer leaf reinforcing bar net with inner leaf reinforcing bar net passes through steel bar truss connects and forms integral steel reinforcement cage, first rubber pad correspondence is located around the prefabricated outer leaf coincide wallboard, the second rubber pad correspondence is located around the prefabricated inner leaf coincide wallboard, first rubber pad reaches the second rubber pad is all connected on steel bar net.
2. The fabricated sandwich self-insulating double-sided overlapping energy-dissipating enclosure panel as claimed in claim 1, wherein the steel bar trusses meet the design requirements of specifications in terms of structure and arrangement.
3. The fabricated sandwich self-insulating double-sided laminated energy-dissipating enclosure panel as claimed in claim 1 or 2, wherein the insulating core wall is formed by pouring foam concrete.
4. The construction method of the assembled sandwich self-insulation double-sided overlapping energy-dissipation enclosing wall panel as claimed in any one of claims 1 to 3, is characterized by comprising the following steps:
binding and manufacturing an inner leaf reinforcing mesh and an outer leaf reinforcing mesh, and connecting and binding the inner leaf reinforcing mesh and the outer leaf reinforcing mesh through a reinforcing steel bar truss to form a shear wall reinforcing framework;
step two, placing the reinforcement cage obtained in the step one on a pouring die table, fixing, correspondingly arranging a first rubber pad and a second rubber pad on the upper side and the lower side of the reinforcement cage, connecting the first rubber pad to the outer leaf reinforcement net and enclosing to form a ring shape, connecting the second rubber pad to the inner leaf reinforcement net and enclosing to form a ring shape, pouring outer leaf concrete and embedding the outer leaf reinforcement net in the outer leaf reinforcement net, turning the wall body 180 degrees after the outer leaf concrete reaches a certain strength and moving the wall body to another pouring die table, pouring inner leaf concrete and embedding the inner leaf reinforcement net in the inner leaf concrete, and removing the die after the outer leaf concrete and the inner leaf concrete reach a certain strength to obtain the double-faced superposed energy-dissipating wall board;
step three, conveying the double-sided superposed energy-consumption wall board obtained in the step two to a construction site, splicing the double-sided superposed energy-consumption wall board according to requirements, effectively connecting the double-sided superposed energy-consumption wall board with an upper layer structure and a lower layer structure by using vertical connecting steel bars, and pouring core layer foam concrete to obtain the self-heat-preservation double-sided superposed energy-consumption enclosure wall board;
and step four, after the foam concrete of the core layer reaches a certain strength, the upper structure construction operation can be carried out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010014121.7A CN111335500A (en) | 2020-01-07 | 2020-01-07 | Assembly type sandwich self-heat-preservation double-sided overlapped energy-consumption enclosing wall plate and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010014121.7A CN111335500A (en) | 2020-01-07 | 2020-01-07 | Assembly type sandwich self-heat-preservation double-sided overlapped energy-consumption enclosing wall plate and construction method thereof |
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| CN111335500A true CN111335500A (en) | 2020-06-26 |
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| CN202010014121.7A Pending CN111335500A (en) | 2020-01-07 | 2020-01-07 | Assembly type sandwich self-heat-preservation double-sided overlapped energy-consumption enclosing wall plate and construction method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113684965A (en) * | 2021-09-24 | 2021-11-23 | 华东建筑设计研究院有限公司 | Prefabricated superimposed thermal insulation wall and shear wall |
| CN115030350A (en) * | 2022-05-05 | 2022-09-09 | 北京工业大学 | Prefabricated ceramsite and foam concrete composite shear wall with truss ribs |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113684965A (en) * | 2021-09-24 | 2021-11-23 | 华东建筑设计研究院有限公司 | Prefabricated superimposed thermal insulation wall and shear wall |
| CN115030350A (en) * | 2022-05-05 | 2022-09-09 | 北京工业大学 | Prefabricated ceramsite and foam concrete composite shear wall with truss ribs |
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Application publication date: 20200626 |