To Test Vertical Welded Butt Joints of Panel Buildings

Abstract

Национальный исследовательский Московский государственный строительный университет, г. Москва, Россия Аннотация. В данной работе было проведено экспериментальное исследование сварного обетонированного стыка на сдвиговое усилие. Испытание проводилось только на сдвиг, поскольку основное статическое назначение вертикальных стыковых соединений панелей -обеспечить восприятие сдвигающих сил, возникающих в стыках при совместной работе сопрягаемых стен. Объектом исследования является фрагмент вертикального стенового соединения 125 серии крупнопанельных жилых зданий, толщина которого составляла 160мм, а общая высота -550мм. В результате проведенных экспериментальных исследований определено напряженно-деформированное состояние вертикального стыкового соединения и предложена аппроксимирующая зависимость деформации сварного стыка от усилий сдвига. Результаты испытаний могут быть использованы при расчете несущих систем крупнопанельных зданий с учетом нелинейной податливости сварных стыков.Ключевые слова: связи сдвига, податливость связей, стыковые соединения, крупнопанельные здания.Abstract. In this work, an experimental study of the welded concreted joint on the shear force was carried out. The test was carried out only for shear, since the main static purpose of vertical butt joints of panels is to ensure the perception of shear forces arising in the joints when the mating walls work together. The object of the study was a fragment of wall vertical connection 125 a series of largepanel residential buildings, the thickness of which was 160 mm and the total height is 550mm. In result of experimental research defined stress-strain state of vertical butt joints and proposed approximating the dependence of the deformation of the weld joint from shear forces. The test results can be used in the calculation of load-bearing systems of largt-panel buildings taking into account the nonlinear compliance of welded joints.

Stress-strain state panel buildings and welded butt joints

“…Particular attention was paid to vertical butt welds as the main type of joint in panel buildings. The nonlinearity of the weld joint deformation was taken into account according to the deformation diagram "shear force Q -displacement Δ" obtained by the authors of [22][23][24] (figure 3). Wall panels in the 125 series were connected by welded butts.…”

Stress-Strain State Multistory Buildings and Stiffness Shear Bonds

“…Description of the diagrams of concrete deformation in compression is contained in the design standards [8,9]. Various studies are devoted to the analysis of the work of shear bonds [10][11][12], welded butts, vertical concrete joints [13][14].…”

Structural solution of the horizontal joint of floor slabs in girderless frame

“…Separately, we can distinguish solutions based on the use of welded loop-shaped embedded parts in the joints [37,38], for which multi-factor experiments established the bearing capacity for shear and tension, determined the destructive loads, proposed models of the joint action of the moment and the tensile force, described the schemes of crack formation and destruction. A number of studies are devoted to the work of vertical joints of wall panels on shear, in particular, the use of a nonlinear deformation model for determining the bearing capacity of the joint is considered [39], the triaxial stress state of the joint is analytically described and the parameters of the arrangement of loops are described [40], it is proposed to take into account nonlinear dependencies for estimating the deformations of the vertical joint between panels, and the approximating dependence of deformations on shear forces is described [41]. However, these studies concern vertical joints between wall panels.…”