ABSTRACT

Transformations and restorations of existing buildings may have to solve major issues regarding the buildings’ structural safety. Timber floors for instance may be damaged due to decay, a faulty design or a poor implementation during construction. Moreover, most of the times old or historical buildings have been designed for a maximum load much lower than the one prescribed nowadays by current standards. Hence, the floors must often be strengthened to increase their load-bearing capacity and/or stiffness. This paper investigates a strengthening technique consisting of new CLT panels screwed over the existing floors, through the use of timber blocks, maintaining an additional gap between the new CLT panel and the existing joists. The interest of the technique is evaluated by assessing experimentally the potential gains regarding load carrying capacity and stiffness, through tests on reconstituted floor elements, on one hand, and on connections, on the other hand.

抽象的

现有建筑物的改造和修复可能必须解决有关建筑物结构安全的重大问题。例如，木地板可能会由于腐烂，错误的设计或施工过程中的不良实施而​​损坏。此外，大多数时候的旧建筑物或历史建筑物的最大负荷设计要远远低于当前现行标准所规定的最大负荷。因此，必须经常加固地板以增加其承载能力和/或刚度。本文研究了一种加固技术，该技术包括使用木块将新的CLT面板拧在现有地板上，从而在新的CLT面板和现有托梁之间保持额外的间隙。