论文部分内容阅读
为了研究以岩棉为芯材的结构保温板(SIPs)力学性能及不同芯材厚度对其力学性能的影响,以定向刨花板(OSB)为面板,分别对3种不同芯材厚度的SIPs进行了抗拉、抗压和双剪切试验,得到了SIPs中不同厚度岩棉芯材的抗拉、抗压和抗剪强度与相应的应力应变曲线,并对其破坏形态进行了分析。研究结果表明:岩棉芯材试件受拉、受剪开裂后,强度不会立刻丧失,而是逐渐降低,直至试件被完全破坏;在抗压试验中,随着荷载的增加,试件产生明显的压缩变形,当变形达到50%后卸载,试件有一定的回弹,但抗压能力基本丧失;不同芯材厚度对试件强度影响不同,随着芯材厚度的增加,试件的抗拉、抗剪强度有所降低,且随着厚度的增加边际减弱效果递减;当芯材厚度由50mm增至60mm时,抗拉、抗剪强度分别减少了0.8kPa和14.46kPa;当芯材厚度由60mm增至150mm时,抗拉、抗剪强度分别减少了1.63kPa和7.1kPa;而抗压强度随着芯材厚度的增加先增大后减小。以岩棉为芯材的SIP结构具有一定的承载能力,结合其良好的防火性能与耐久性能,在工程应用中可根据受力要求选用。
In order to study the mechanical properties of the thermal insulation sheets (SIPs) with rockwool as the core material and the influence of the different core material thickness on the mechanical properties, SIPs with three different core thickness Tensile, compressive and shear strength and corresponding stress-strain curves of rockwool cores with different thicknesses in SIPs were obtained by tensile, compressive and double-shear tests. The failure modes were also analyzed. The results show that the strength of rockwoolie core specimens is not reduced immediately after shearing and shearing, but gradually decreases until the specimens are completely destroyed. In the compressive tests, as the load increases, The compressive deformation of the test piece is obvious. When the deformation is up to 50%, the test piece is unloaded and the test piece has some resilience, but its compressive capacity basically loses. Different core materials have different influences on the test piece strength. With the increase of the core thickness, The tensile strength and shear strength of the core decrease with the increasing of the thickness, while the decrease of the tensile strength and the shear strength decrease with the increasing of the thickness. When the thickness of the core increases from 50mm to 60mm, the tensile and shear strengths decrease by 0.8kPa and 14.46kPa respectively. When the thickness of the material is increased from 60mm to 150mm, the tensile strength and shear strength decrease by 1.63kPa and 7.1kPa, respectively. The compressive strength first increases and then decreases with the increase of the thickness of the core. The rock wool as the core of the SIP structure has a certain carrying capacity, combined with its good fire performance and durability, in engineering applications can be selected according to the force requirements.