Abstract
Since the composition and stress state of thermal-insulation composite plates are extremely complex, it is difficult to conduct calculation using conventional methods. Further calculation on its composition structure is even more difficult. To settle this difficulty, this paper conducted experimental investigations on thermal-insulation composite plate and conventional composite plates, and a simplified calculation method with improved factors was deduced based on the experimental results. In this study, the influence of nonstructural thermal insulation system on the composite plate was specially considered. The calculated expressions are deduced, while the stiffness and damping (properties) are determined. Case analysis was carried out to validate the reliability and accuracy of the simplified calculation method of improvement factor. The research results indicate that the modeling difficulty and computational effort are greatly reduced, with relatively small errors. Hence, it is beneficial to the calculation and analysis of composite plates and global structures.
Highlights
Obtained. e force-displacement curves are shown in Figure 7, while test data is summarized in Table 2. e tests results of conventional composite plates without thermal insulation system refer to those reported in Ref. [2]
The deformation magnitudes of key points of thermalinsulation composite plates are improved by 1.14, 1.20, and 1.44 times, respectively. e test results indicate that if the thermal insulation system can cooperatively work with conventional composite plates, the global strength and stiffness of composite plates can be effectively improved
According to the above analysis results, to fully consider the role played by the thermal insulation system in composite plates and achieve the reasonably simplified calculation and investigation of composite plates, this paper proposes the concept and expression of stiffness improvement factor. is conclusion is crucial to the smooth calculation of thermal-insulation composite plates and other complex structures
Summary
Ermal-insulation composite plates consist of bidirectional porous plasterboard, hidden beams, embedded columns, and thermal insulation systems. E diameter of rebars in composite plates and load beams is all 14 mm. Rebars in the fixed beam of the component bottom are mainly load-bearing rebars (diameter of 20 mm) and stirrup rebars (diameter of 8 mm). E measurement system mainly consists of a horizontal displacement meter, a load sensor, a dial indicator, and the strain gauges for different materials. E results of the triaxial shear test of polystyrene insulation board are shown in Figures 5 and 6
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