Featuresof the stress-and-strain state of outer walls under the influence of variable temperatures Особенности напряженно-деформированного состояния наружных стен при воздействии переменных температур

• Main Authors: Kremnev Vasiliy Anatol'evich, Kuznetsov Vitaliy Sergeevich, Talyzova Yuliya Aleksandrovna
• Format: Article
• Language: English
• Published: Moscow State University of Civil Engineering (MGSU) 2013-09-01
• Series: Vestnik MGSU
• Subjects: outer wall; deformation; monolithic frame building; isotropic plate; temperature; stress; thermal stress; strength; load bearing capacity; calculation model; load; crack; tension; compression; bond; friction force; наружная стена; деформация; монолитное каркасное зда- ние; изотропная пластинка; температура; усилие; температурное напряжение; прочность; несущая способность; расчетная схема; загружение; трещина; растяжение; сжатие; кладка; сила трения
• Online Access: http://vestnikmgsu.ru/files/archive/RUS/issuepage/2013/10/7.pdf
• ISSN: 1997-0935; 2304-6600

The authors draw attention to possible problems in the process of construction and operation of monolithic frame buildings, construction of which is now widespread. It is known that cracks can often appear in the facade and side walls. The size of the cracks can exceed the allowable limits and repair does not lead to their complete elimination. Also cracks significantly mar the appearance of a building. Thus, the relevance of this study lies not only in fuller understanding of the operation of walls, but also in the ability to prevent undesirable effects.The authors calculated temperature effects for boundary walls of the building blocks made of heavy concrete. The original dimensions of the walls conformed to a grid of columns for the majority of residential and public buildings.The stress-and-strain state of the walls in case of temperature changes is observed in detail, including the transition from sub-zero to above-zero temperatures within the same section (wall). It was revealed that the temperature variations within the established limits may cause stress-and-strain state in the walls, in which the temperature tensile stresses can exceed the tensile strength of materials. The article contains effective means of reducing thermal strains, which can prevent temperature and shrinkage cracking.<br>Продемонстрированы последствия температурных воздействий, которым подвергаются наружные стены монолитных каркасных зданий. Подробно рассмотрено напряженное состояние стен при различных перепадах температур, в т.ч. при переходе от отрицательных к положительным температурам в пределах одной секции (стены).