Many aluminum alloy doors and windows and curtain walls are now broken bridge heat insulation technology. They are light weight, good toughness, high strength, energy saving, and good anti-aging properties. They are consulted by consultants, designers, architects, door and window factories, and curtain wall companies. The favor of the owners, the advancement of the development is bright.
With the extensive use of this technology, designers must use reasonable calculation methods and formulas they are familiar with to ensure that design solutions are safe and economical. How to calculate the structural performance of aluminum alloy composite profiles? What is the relationship between its bending deformation and stress? How is the shear strength of thermal insulation expected? This article will discuss the above issues.
Since the insulation materials began to be used in aluminum alloy doors and windows, curtain wall systems, there are two kinds of systems in the market leading position, is often referred to as the gating system, as well as the wear system.
Casting insulation technology comes from the United States in the 60's. In the early 1970s, with the development and application of insulating glass, pouring and heat-insulating aluminum doors and windows developed rapidly. In 1990, the American Construction Manufacturers Association (AAMA) issued the TIR-A8-90 standard to guide the manufacture of insulated aluminum doors and windows, curtain walls, hallways, skylights and other products. In 2004, the American Construction Manufacturers Association (AAMA) refurbished the aluminum alloy thermal insulation technology standards and issued the TIR-A8-04 standard, which better solved practical problems and instructed the manufacture and application of aluminum alloy thermal insulation products.
Wear strip heat insulation technology comes from Europe in the early 70s. In order to meet the needs of special projects, Ensinger GmbH and Wicona have developed this technology as a structural thermal insulation technology, and used it for the construction of doors and windows in 1978. In 2004, the EN14024 standard was issued to guide the manufacture of aluminum alloy doors and windows, curtain walls and other products.
Pouring heat insulation aluminum alloy technology has been successfully applied in North America for more than 30 years, the market share is over 80%, the technology is mature, the overall structure is strong, the production efficiency is high, the quality is stable, the cost is low, and the heat insulation effect is good; its standard AAMA TIR-A8-04 is more authoritative and is worthy of our reference. This article will focus on the calculation of the structural performance of cast insulation technology.
summary:
1. The larger deformation location is at the center of the composite aluminum alloy profile, refer to equation (41). The relative deflection of the main bearing member should not be greater than L/180 (L is the length of the member), or the deflection of the curtain wall is within 20mm. When the type and size of the load (centralized, uniform, triangular, or trapezoidal) are determined, the length of the composite aluminum alloy member is given, and the effective moment of inertia of the member can be calculated by the formula. See AAMA TIR- A8-04.
2. The location of the larger compression and tensile stress of the aluminum alloy profile is also at the center of the composite aluminum alloy profile, refer to equations (45) and (46). Appropriately choose the appropriate aluminum alloy award (6063-T5, 6063-T6, 6061-T6).
3. The larger shear stress location of the insulation glue is at both ends of the composite member, refer to equation (48). The greater shear stress allowable value of American Asone Insulation Adhesive is 6.9 N/mm2. The test method is in accordance with the normal temperature longitudinal shear test of GB5237.6, and the characteristic value of the longitudinal shear force is divided by the shear area of ​​the heat-insulating rubber, and divided by a safety factor of 1.9.
With the extensive use of this technology, designers must use reasonable calculation methods and formulas they are familiar with to ensure that design solutions are safe and economical. How to calculate the structural performance of aluminum alloy composite profiles? What is the relationship between its bending deformation and stress? How is the shear strength of thermal insulation expected? This article will discuss the above issues.
Since the insulation materials began to be used in aluminum alloy doors and windows, curtain wall systems, there are two kinds of systems in the market leading position, is often referred to as the gating system, as well as the wear system.
Casting insulation technology comes from the United States in the 60's. In the early 1970s, with the development and application of insulating glass, pouring and heat-insulating aluminum doors and windows developed rapidly. In 1990, the American Construction Manufacturers Association (AAMA) issued the TIR-A8-90 standard to guide the manufacture of insulated aluminum doors and windows, curtain walls, hallways, skylights and other products. In 2004, the American Construction Manufacturers Association (AAMA) refurbished the aluminum alloy thermal insulation technology standards and issued the TIR-A8-04 standard, which better solved practical problems and instructed the manufacture and application of aluminum alloy thermal insulation products.
Wear strip heat insulation technology comes from Europe in the early 70s. In order to meet the needs of special projects, Ensinger GmbH and Wicona have developed this technology as a structural thermal insulation technology, and used it for the construction of doors and windows in 1978. In 2004, the EN14024 standard was issued to guide the manufacture of aluminum alloy doors and windows, curtain walls and other products.
Pouring heat insulation aluminum alloy technology has been successfully applied in North America for more than 30 years, the market share is over 80%, the technology is mature, the overall structure is strong, the production efficiency is high, the quality is stable, the cost is low, and the heat insulation effect is good; its standard AAMA TIR-A8-04 is more authoritative and is worthy of our reference. This article will focus on the calculation of the structural performance of cast insulation technology.
summary:
1. The larger deformation location is at the center of the composite aluminum alloy profile, refer to equation (41). The relative deflection of the main bearing member should not be greater than L/180 (L is the length of the member), or the deflection of the curtain wall is within 20mm. When the type and size of the load (centralized, uniform, triangular, or trapezoidal) are determined, the length of the composite aluminum alloy member is given, and the effective moment of inertia of the member can be calculated by the formula. See AAMA TIR- A8-04.
2. The location of the larger compression and tensile stress of the aluminum alloy profile is also at the center of the composite aluminum alloy profile, refer to equations (45) and (46). Appropriately choose the appropriate aluminum alloy award (6063-T5, 6063-T6, 6061-T6).
3. The larger shear stress location of the insulation glue is at both ends of the composite member, refer to equation (48). The greater shear stress allowable value of American Asone Insulation Adhesive is 6.9 N/mm2. The test method is in accordance with the normal temperature longitudinal shear test of GB5237.6, and the characteristic value of the longitudinal shear force is divided by the shear area of ​​the heat-insulating rubber, and divided by a safety factor of 1.9.
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