Abstract
There are many vertically deflected building structures in the world that require rectification. Temporary supports installed in the building bearing walls can be used to perform such a rectification. The supports consist of a hydraulic piston jack, a stack of parallelepiped steel elements, and a concrete grout. The structure is unevenly raised and reaches the desired vertical position using such supports. The support in which the piston extension is forced at the given time is an active support. The aim was to determine the stiffness of an active support. The investigations were performed in in situ conditions during experimental building rectification. No such investigations have been performed to date. It has been demonstrated that the stiffness of the investigated support results from the stiffness of the serially connected elements forming the support. In general, the support stiffness depends on the value of the force occurring in the support and is rising linearly along with the load for the investigated range. It was also shown that the force existing in the active support also depends on the stiffness of the building being rectified. The investigations carried out show that it is advantageous to use supports with smaller stiffness for rectification, as forces with smaller values must be induced in them. The application of forces with lower values also allows the avoidance of unfavorable penetration of the unlifted part of the building into the ground.
Highlights
IntroductionOne of the issues emerging in civil engineering is the vertical deflection of building structures
One of the issues emerging in civil engineering is the vertical deflection of building structures.The issue concerns all types of buildings
The supports consisted of a hydraulic piston jack and a 10 mm thick sheet metal embedded in a 150 mm thick concrete grout
Summary
One of the issues emerging in civil engineering is the vertical deflection of building structures. The deflection of adjacent buildings may lead to their interaction Such a situation took place as a result of simultaneous changes of deformations and slope of the ground surface [10]. The above-ground part of the structure is deformed, as a result of which the adjacent structures can be subject to pounding This phenomenon was analyzed for buildings in series [11], steel buildings [12]. The impactland of subsidence iscoal caused by the of voids left after underground and even the underground mining on tightening the deflection of buildings [20,21], changes exploitation, in land sloping near flood exploitation of natural underground bodies [19]. —displacement of the lifted part of thebuilding, building, ext obj of the lifted part of the forced extension of the active support piston, uobj—displacement.
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