Highly Effective Lattice Punching Shear Reinforcement

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Title: Highly Effective Lattice Punching Shear Reinforcement

Author(s): Johannes Furche, Carsten Siburg, and Ulrich Bauermeister

Publication: Special Publication

Volume: 321

Issue:

Appears on pages(s): 9.1-9.12

Keywords: flat slab, lattice girder, punching shear, semi precast slab, shear reinforcement, slab-column connection

Date: 9/29/2017

Abstract:
Lattice girders consist of longitudinal reinforcing bars which are connected to vertical or inclined struts by welding. Due to the great stiffness of the anchorage of the struts, this kind of reinforcement works well as shear reinforcement also in two way span flat slabs. The experience with different kinds of girders as punching shear reinforcement led to an optimized girder shape. This highly effective girder was tested in full scale tests to obtain a European Technical Approval based on the European design code Eurocode 2. These tests are described in this paper. The results are evaluated according to the American design rules of ACI 318-14 too. The punching shear resistance of slabs with this special lattice punching shear reinforcement is compared with the resistance when using other reinforcement.