Zhangabay Nurlan, Sapargaliyeva Bayan, Utelbayeva Akmaral, Kolesnikov Alexandr, Aldiyarov Zhumadilla, Dossybekov Serik, Esimov Esenbek, Duissenbekov Bolat, Fediuk Roman, Vatin Nikolai Ivanovich, Yermakhanov Myrzabek, Mussayeva Saule
Department of Construction and Construction Materials, M. Auezov South Kazakhstan University Shymkent, Shymkent 160012, Kazakhstan.
Abai Kazakh National Pedagogical University, Almaty 050010, Kazakhstan.
Materials (Basel). 2022 Jul 18;15(14):4996. doi: 10.3390/ma15144996.
The paper presents the results of experimental studies of the features of the operation of prestressed shells, taking into account the various structural parameters of the prestress. It is established that when the winding angle changes from perpendicular to the shell axis to 75° and 65°, the circumferential stresses decrease 1.4 times and 1.2 times, respectively, and the axial stresses increase five and three times, which are two and four times lower than the circumferential, from which it can be concluded that the reduction in the winding angle to the longitudinal the axis of the shell has a positive effect on the stress state of the structure. The study also found that with an increase in the diameter of the winding wire from 1 to 2 mm and a change in the winding angle, the same nature of the stress distribution is observed, but the values of the stress state parameter change, so the efficiency increases up to 25% due to an increase in the winding thickness, depending on the pitch, angle and thickness of the winding, which favorably affects the strength and the bearing capacity of the structure as a whole by increasing the value of the stress state parameter. Thus, the results of the analysis will allow us to use in more detail the possibility of controlling the stress-strain state of the prestressed shell by changing the design parameters, and the results obtained can be used in design or construction, as well as when increasing the strength characteristics of the structure, which allows us to create a high-tech design optimal for these operating conditions, which can positively complement the studies conducted earlier in this direction.
本文介绍了考虑预应力各种结构参数的预应力壳体运行特性的实验研究结果。结果表明，当缠绕角度从垂直于壳体轴线变为75°和65°时，周向应力分别降低1.4倍和1.2倍，轴向应力增加5倍和3倍，轴向应力比周向应力低2倍和4倍，由此可以得出结论，减小缠绕角度至壳体纵向轴线对结构的应力状态有积极影响。研究还发现，随着缠绕钢丝直径从1毫米增加到2毫米以及缠绕角度的变化，应力分布性质相同，但应力状态参数值发生变化，因此由于缠绕厚度的增加，效率提高了25%，这取决于缠绕的螺距、角度和厚度，通过增加应力状态参数值，对结构整体的强度和承载能力产生有利影响。因此，分析结果将使我们能够更详细地利用通过改变设计参数来控制预应力壳体应力应变状态的可能性，所获得的结果可用于设计或施工，以及提高结构强度特性时，这使我们能够创建一个针对这些运行条件的高科技优化设计，这可以对该方向早期进行的研究起到积极的补充作用。
