@article{RossiWinandsButenweg2022,
  author    = {Rossi, Leonardo and Winands, Mark H. M. and Butenweg, Christoph},
  title     = {Monte Carlo Tree Search as an intelligent search tool in structural design problems},
  series = {Engineering with Computers : An International Journal for Simulation-Based Engineering},
  volume    = {38},
  journal   = {Engineering with Computers : An International Journal for Simulation-Based Engineering},
  number    = {4},
  editor    = {Zhang, Jessica},
  publisher = {Springer Nature},
  address   = {Cham},
  issn      = {1435-5663},
  doi       = {10.1007/s00366-021-01338-2},
  pages     = {3219 -- 3236},
  year      = {2022},
  abstract  = {Monte Carlo Tree Search (MCTS) is a search technique that in the last decade emerged as a major breakthrough for Artificial Intelligence applications regarding board- and video-games. In 2016, AlphaGo, an MCTS-based software agent, outperformed the human world champion of the board game Go. This game was for long considered almost infeasible for machines, due to its immense search space and the need for a long-term strategy. Since this historical success, MCTS is considered as an effective new approach for many other scientific and technical problems. Interestingly, civil structural engineering, as a discipline, offers many tasks whose solution may benefit from intelligent search and in particular from adopting MCTS as a search tool. In this work, we show how MCTS can be adapted to search for suitable solutions of a structural engineering design problem. The problem consists of choosing the load-bearing elements in a reference reinforced concrete structure, so to achieve a set of specific dynamic characteristics. In the paper, we report the results obtained by applying both a plain and a hybrid version of single-agent MCTS. The hybrid approach consists of an integration of both MCTS and classic Genetic Algorithm (GA), the latter also serving as a term of comparison for the results. The study's outcomes may open new perspectives for the adoption of MCTS as a design tool for civil engineers.},
  language  = {en}
}
@article{ElDeibButenwegKlinkel2021,
  author    = {El-Deib, Khaled and Butenweg, Christoph and Klinkel, Sven},
  title     = {Erdbebennachweis von Mauerwerksbauten mit realistischen Modellen und erh{\"o}hten Verhaltensbeiwerten},
  series = {Mauerwerk},
  volume    = {2021},
  journal   = {Mauerwerk},
  number    = {3},
  editor    = {Jesse, Dirk},
  publisher = {Wiley},
  address   = {Weinheim},
  issn      = {1437-1022},
  doi       = {10.1002/dama.202110014},
  pages     = {110 -- 119},
  year      = {2021},
  abstract  = {Die Anwendung des linearen Nachweiskonzepts auf Mauerwerksbauten f{\"u}hrt dazu, dass bereits heute Standsicherheitsnachweise f{\"u}r Geb{\"a}ude mit {\"u}blichen Grundrissen in Gebieten mit moderaten Erdbebeneinwirkungen nicht mehr gef{\"u}hrt werden k{\"o}nnen. Diese Problematik wird sich in Deutschland mit der Einf{\"u}hrung kontinuierlicher probabilistischer Erdbebenkarten weiter versch{\"a}rfen. Aufgrund der Erh{\"o}hung der seismischen Einwirkungen, die sich vielerorts ergibt, ist es erforderlich, die vorhandenen, bislang nicht ber{\"u}cksichtigten Tragf{\"a}higkeitsreserven in nachvollziehbaren Nachweiskonzepten in der Baupraxis verf{\"u}gbar zu machen. Der vorliegende Beitrag stellt ein Konzept f{\"u}r die geb{\"a}udespezifische Ermittlung von erh{\"o}hten Verhaltensbeiwerten vor. Die Verhaltensbeiwerte setzen sich aus drei Anteilen zusammen, mit denen die Lastumverteilung im Grundriss, die Verformungsf{\"a}higkeit und Energiedissipation sowie die {\"U}berfestigkeiten ber{\"u}cksichtigt werden. F{\"u}r die rechnerische Ermittlung dieser drei Anteile wird ein nichtlineares Nachweiskonzept auf Grundlage von Pushover-Analysen vorgeschlagen, in denen die Interaktionen von W{\"a}nden und Geschossdecken durch einen Einspanngrad beschrieben werden. F{\"u}r die Bestimmung der Einspanngrade wird ein nichtlinearer Modellierungsansatz eingef{\"u}hrt, mit dem die Interaktion von W{\"a}nden und Decken abgebildet werden kann. Die Anwendung des Konzepts mit erh{\"o}hten geb{\"a}udespezifischen Verhaltensbeiwerten wird am Beispiel eines Mehrfamilienhauses aus Kalksandsteinen demonstriert. Die Ergebnisse der linearen Nachweise mit erh{\"o}hten Verhaltensbeiwerten f{\"u}r dieses Geb{\"a}ude liegen deutlich n{\"a}her an den Ergebnissen nichtlinearer Nachweise und somit bleiben {\"u}bliche Grundrisse in Erdbebengebieten mit den traditionellen linearen Rechenans{\"a}tzen nachweisbar.},
  language  = {de}
}
@article{MarinkovićButenweg2022,
  author    = {Marinković, Marko and Butenweg, Christoph},
  title     = {Experimental testing of decoupled masonry infills with steel anchors for out-of-plane support under combined in-plane and out-of-plane seismic loading},
  series = {Construction and Building Materials},
  volume    = {318},
  journal   = {Construction and Building Materials},
  number    = {1},
  editor    = {Ford, Michael C.},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {1879-0526},
  doi       = {10.1016/j.conbuildmat.2021.126041},
  year      = {2022},
  abstract  = {Because of simple construction process, high energy efficiency, significant fire resistance and excellent sound isolation, masonry infilled reinforced concrete (RC) frame structures are very popular in most of the countries in the world, as well as in seismic active areas. However, many RC frame structures with masonry infills were seriously damaged during earthquake events, as the traditional infills are generally constructed with direct contact to the RC frame which brings undesirable infill/frame interaction. This interaction leads to the activation of the equivalent diagonal strut in the infill panel, due to the RC frame deformation, and combined with seismically induced loads perpendicular to the infill panel often causes total collapses of the masonry infills and heavy damages to the RC frames. This fact was the motivation for developing different approaches for improving the behaviour of masonry infills, where infill isolation (decoupling) from the frame has been more intensively studied in the last decade. In-plane isolation of the infill wall reduces infill activation, but causes the need for additional measures to restrain out-of-plane movements. This can be provided by installing steel anchors, as proposed by some researchers. Within the framework of European research project INSYSME (Innovative Systems for Earthquake Resistant Masonry Enclosures in Reinforced Concrete Buildings) the system based on a use of elastomers for in-plane decoupling and steel anchors for out-of-plane restrain was tested. This constructive solution was tested and deeply investigated during the experimental campaign where traditional and decoupled masonry infilled RC frames with anchors were subjected to separate and combined in-plane ‬and out-of-plane loading. Based on a detailed evaluation and comparison of the test results, the performance and effectiveness of the developed system are illustrated.},
  language  = {en}
}
@misc{ButenwegGellertReindletal.2009,
  author    = {Butenweg, Christoph and Gellert, Christoph and Reindl, Lukas and Meskouris, Konstantin},
  title     = {A nonlinear method for the seismic safety verification of masonry buildings},
  publisher = {National Technical University of Athens},
  address   = {Athen},
  year      = {2009},
  abstract  = {In order for traditional masonry to stay a competitive building material in seismically active regions there is an urgent demand for modern, deformation-based verification procedures which exploit the nonlinear load bearing reserves. The Capacity Spectrum Method (CSM) is a widely accepted design approach in the field of reinforced concrete and steel construction. It compares the seismic action with the load-bearing capacity of the building considering nonlinear material behavior with its post-peak capacity. The bearing capacity of the building is calculated iteratively using single wall capacity curves. This paper presents a new approach for the bilinear approximation of single wall capacity curves in the style of EC6/EC8 respectively FEMA 306/FEMA 356 based on recent shear wall test results of the European Collective-Research Project "ESECMaSE". The application of the CSM to masonry structures by using bilinear approximations of capacity curves as input is demonstrated on the example of a typical German residential home.},
  language  = {en}
}
@inproceedings{RosinKubalskiButenweg2013,
  author    = {Rosin, Julia and Kubalski, Thomas and Butenweg, Christoph},
  title     = {Seismic isolation of cylindrical liquid storage tanks},
  series = {Seismic design of industrial facilities},
  booktitle = {Seismic design of industrial facilities},
  editor    = {Klinkel, Sven and Butenweg, Christoph and Lin, Gao and Holtschoppen, Britta},
  publisher = {Springer Vieweg},
  address   = {Wiesbaden},
  isbn      = {978-3-658-02810-7},
  doi       = {10.1007/978-3-658-02810-7_36},
  pages     = {429 -- 440},
  year      = {2013},
  abstract  = {Seismic excited liquid filled tanks are subjected to extreme loading due to hydrodynamic pressures, which can lead to nonlinear stability failure of the thinwalled cylindrical tanks, as it is known from past earthquakes. A significant reduction of the seismically induced loads can be obtained by the application of base isolation systems, which have to be designed carefully with respect to the modified hydrodynamic behaviour of the tank in interaction with the liquid. For this reason a highly sophisticated fluid-structure interaction model has to be applied for a realistic simulation of the overall dynamic system. In the following, such a model is presented and compared with the results of simplified mathematical models for rigidly supported tanks. Finally, it is examined to what extent a simple mechanical model can represent the behaviour of a base isolated tank in case of seismic excitation},
  language  = {en}
}
@inproceedings{ButenwegRajan2014,
  author    = {Butenweg, Christoph and Rajan, Sreelakshmy},
  title     = {Design and construction techniques of AAC masonry buildings in earthquakes regions},
  series = {10 years Xella research in Building Materials : Symposium on the 4th and 5th of September, Potsdam 2014},
  booktitle = {10 years Xella research in Building Materials : Symposium on the 4th and 5th of September, Potsdam 2014},
  year      = {2014},
  language  = {en}
}
@inproceedings{ButenwegMeyerFehling2014,
  author    = {Butenweg, Christoph and Meyer, Udo and Fehling, Ekkehard},
  title     = {INSYSME: first activities of the German partners},
  series = {9th International Masonry Conference 2014 in Guimaraes, Portugal, 2014},
  booktitle = {9th International Masonry Conference 2014 in Guimaraes, Portugal, 2014},
  year      = {2014},
  language  = {en}
}
@inproceedings{BoesenRosinButenwegetal.2017,
  author    = {Boesen, Niklas and Rosin, Julia and Butenweg, Christoph and Deichsel, Anne and Klinkel, Sven},
  title     = {Untersuchung vorhandenerTragreserven moderner unbewehrter Mauerwerksbauten},
  series = {Vortragsband der 15. D-A-CH-Tagung Erdbebeningenieurwesen und Baudynamik},
  booktitle = {Vortragsband der 15. D-A-CH-Tagung Erdbebeningenieurwesen und Baudynamik},
  editor    = {Zabel, Volkmar and Beinersdorf, Silke},
  publisher = {Deutsche Gesellschaft f{\"u}r Erdbebeningenieurwesen und Baudynamik (DGEB) e.V.},
  address   = {Weimar},
  isbn      = {978-3-930108-13-5},
  pages     = {408 -- 418},
  year      = {2017},
  language  = {de}
}
@inproceedings{ButenwegMarinkovićKubalskietal.2017,
  author    = {Butenweg, Christoph and Marinković, Marko and Kubalski, Thomas and Fehling, Ekkehard and Pfetzing, Thomas and Meyer, Udo},
  title     = {Innovative Ans{\"a}tze f{\"u}r die seismische Auslegung von Stahlbetonrahmentragwerken mit Ausfachungen aus Ziegelmauerwerk},
  series = {Vortragsband der 15. D-A-CH-Tagung Erdbebeningenieurwesen und Baudynamik},
  booktitle = {Vortragsband der 15. D-A-CH-Tagung Erdbebeningenieurwesen und Baudynamik},
  editor    = {Zabel, Volkmar and Beinersdorf, Silke},
  publisher = {Deutsche Gesellschaft f{\"u}r Erdbebeningenieurwesen und Baudynamik (DGEB) e.V.},
  address   = {Weimar},
  isbn      = {978-3-930108-13-5},
  pages     = {130 -- 145},
  year      = {2017},
  language  = {de}
}
@article{MaurerRiekeSchemmetal.2023,
  author    = {Maurer, Florian and Rieke, Christian and Schemm, Ralf and Stollenwerk, Dominik},
  title     = {Analysis of an urban grid with high photovoltaic and e-mobility penetration},
  series = {Energies},
  volume    = {16},
  journal   = {Energies},
  number    = {8},
  publisher = {MDPI},
  address   = {Basel},
  issn      = {1996-1073},
  doi       = {10.3390/en16083380},
  pages     = {18 Seiten},
  year      = {2023},
  abstract  = {This study analyses the expected utilization of an urban distribution grid under high penetration of photovoltaic and e-mobility with charging infrastructure on a residential level. The grid utilization and the corresponding power flow are evaluated, while varying the control strategies and photovoltaic installed capacity in different scenarios. Four scenarios are used to analyze the impact of e-mobility. The individual mobility demand is modelled based on the largest German studies on mobility "Mobilit{\"a}t in Deutschland", which is carried out every 5 years. To estimate the ramp-up of photovoltaic generation, a potential analysis of the roof surfaces in the supply area is carried out via an evaluation of an open solar potential study. The photovoltaic feed-in time series is derived individually for each installed system in a resolution of 15 min. The residential consumption is estimated using historical smart meter data, which are collected in London between 2012 and 2014. For a realistic charging demand, each residential household decides daily on the state of charge if their vehicle requires to be charged. The resulting charging time series depends on the underlying behavior scenario. Market prices and mobility demand are therefore used as scenario input parameters for a utility function based on the current state of charge to model individual behavior. The aggregated electricity demand is the starting point of the power flow calculation. The evaluation is carried out for an urban region with approximately 3100 residents. The analysis shows that increased penetration of photovoltaics combined with a flexible and adaptive charging strategy can maximize PV usage and reduce the need for congestion-related intervention by the grid operator by reducing the amount of kWh charged from the grid by 30\% which reduces the average price of a charged kWh by 35\% to 14 ct/kWh from 21.8 ct/kWh without PV optimization. The resulting grid congestions are managed by implementing an intelligent price or control signal. The analysis took place using data from a real German grid with 10 subgrids. The entire software can be adapted for the analysis of different distribution grids and is publicly available as an open-source software library on GitHub.},
  language  = {en}
}