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Dive into the research topics where Martin Classen is active.

Publication


Featured researches published by Martin Classen.


Aci Structural Journal | 2015

Experimental Investigations on Prestressed Concrete Beams with Openings

Martin Classen; Tobias Dressen

longitudinal direction. Proper arrangement and dimensioning of reinforcement, the load-carrying capacity of concrete beams with openings can attain approximately the same load-carrying capacity as concrete beams without openings. At ultimate limit state, the global shear force of beams with openings is mainly carried by the compression chord.


Materials | 2017

Strengthening of Existing Bridge Structures for Shear and Bending with Carbon Textile-Reinforced Mortar

Martin Herbrand; Viviane Adam; Martin Classen; Dominik Kueres; Josef Hegger

Increasing traffic loads and changes in code provisions lead to deficits in shear and flexural capacity of many existing highway bridges. Therefore, a large number of structures are expected to require refurbishment and strengthening in the future. This projection is based on the current condition of many older road bridges. Different strengthening methods for bridges exist to extend their service life, all having specific advantages and disadvantages. By applying a thin layer of carbon textile-reinforced mortar (CTRM) to bridge deck slabs and the webs of pre-stressed concrete bridges, the fatigue and ultimate strength of these members can be increased significantly. The CTRM layer is a combination of a corrosion resistant carbon fiber reinforced polymer (CFRP) fabric and an efficient mortar. In this paper, the strengthening method and the experimental results obtained at RWTH Aachen University are presented.


2017 fib Symposium | 2018

Improvement of Punching Shear Design Provisions According to Eurocode 2

Dominik Kueres; Carsten Siburg; Martin Herbrand; Martin Classen; Josef Hegger

The punching shear design of flat slabs and footings was revised with the introduction of Eurocode 2. While in many former codes the punching shear resistance was determined regardless of the type of member, in Eurocode 2 two different design equations for flat slabs and footings were introduced. Additionally, different control sections for flat slabs and footings were defined. The differentiation between flat slabs and footings and especially the iterative design procedure for the determination of the punching shear resistance of footings require great effort in daily engineering practice.


Structural Concrete | 2015

Shear behaviour of composite dowels in transversely cracked concrete

Martin Classen; Martin Herbrand


Engineering Structures | 2017

Assessing the pry-out resistance of open rib shear connectors in cracked concrete - Engineering model with aggregate interlock

Martin Classen; Josef Hegger


Bauingenieur | 2015

Numerische Abbildung von Beton mit einem plastischen Schaedigungsmodell. Grundlegende Untersuchungen zu Normalbeton und UHPC

Dominik Kueres; Alexander Stark; Martin Herbrand; Martin Classen


Structural Concrete | 2015

Shear tests on continuous prestressed concrete beams with external prestressing

Martin Herbrand; Martin Classen


Structural Concrete | 2016

Anchorage of composite dowels in UHPC under fatigue loading

Martin Classen; Joerg Gallwoszus; Alexander Stark


Engineering Structures | 2017

Uniform Design Method for punching shear in flat slabs and column bases

Dominik Kueres; Carsten Siburg; Martin Herbrand; Martin Classen; Josef Hegger


Steel Construction | 2016

Anchorage of composite dowels

Martin Classen; Josef Hegger

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