Quasi-static cyclic tests of precast bridge columns with different connection details for high seismic zones

Seismic analysis of high-rise mega-braced frame-core buildings

Numerical web-shear strength assessment of precast prestressed hollow core slab units

This paper investigates the seismic response of lightly reinforced precast concrete shear walls typically used for low- to mid-rise residential systems in past and current Dutch building practice. The results of a wide set of pseudostatic cyclic tests performed on full-scale single precast panels with or without openings were examined and discussed, quantifying the sensitivity of structural response and failure mode to changes in axial load and wall geometry. Behavioral aspects of those panels were treated at a global/structural and local/sectional level, posing particular emphasis on their wall-to-foundation and wall-to-wall joints. Asymmetric push–pull tests of precast wall connections were also carried out and presented to characterize the cyclic behavior of this type of joint system under simulated seismic loading. The outcome of this large campaign of experimental tests was then used to develop and validate a simple numerical model to be integrated in a framework for large scale seismic fragility analysis of precast terraced structures built with this particular technology.

Experimental and numerical investigation of the seismic response of precast wall connections

Seismic performances of precast segmental column under bidirectional earthquake motions: Shake table test and numerical evaluation

The focus of the present study is to investigate both local and global behaviour of a precast concrete sandwich panel. The selected prototype consists of two reinforced concrete layers coupled by a system of cold-drawn steel profiles and one intermediate layer of insulating material. High-definition nonlinear finite element (FE) models,based on 3D brick and 2D interface elements, are used to assess the capacity of this technology under shear, tension and compression. Geometrical nonlinearities are accounted via large displacement-large strain formulation, whilst material nonlinearities are included, in the series of simulations, by means of Von Mises yielding criterion for steel elements and a classical total strain crack model for concrete; a bond-slip constitutive law is additionally adopted to reproduce steel profile-concrete layer interaction. First, constitutive models are calibrated on the basis of preliminary pull and pull-out tests for steel and concrete, respectively. Geometrically and materially nonlinear FE simulations are performed, in compliance with experimental tests, to validate the proposed modeling approach and characterize shear,compressive and tensile response of this system, in terms of global capacity curves and local stress/strain distributions. Based on these experimental and numerical data, the structural performance is then quantified under various loading conditions, aimed to reproduce the behaviour of this solution during production, transport, construction and service conditions.

Manya Deyanova

Papers

Numerical simulation of hollow steel profiles for lightweight concrete sandwich panels

Displacement – based parametric study on the seismic response of gravity earth-retaining walls

Performance-based assessment of slender reinforced concrete columns typical of precast industrial buildings