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Duhovnik J, Dolinsek B

Computer modeling of robotic assembling of reinforcement

Abstract: The paper describes the functional des@ of a robot system for the assembling of the reinforcement cages for beams and columns. The robot system was developed using a graphic simulation program. The robot cell consists of a frame structure, a supporting mechanism, two robots for moving and assembling of rebars and stirrups, a robot for bending of stirups, a robot for connecting of rebars and stirrups, and a storage table for delivery of rebars and laying down of manufactured reinforcement cages.

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Full text: content.pdf (672,492 bytes) (available to registered users only)

Series: w78:1996 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.software-machine (0.133666) class.software development (0.007740) class.software-software (0.006613)
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Permission to reproduce these papers has been graciously provided by the University of Ljubljana. The assistance of the editor, Prof. Ziga Turk, is gratefully appreciated.


Jack C.P. Cheng and Mohit Mangal

Automated Optimization of Steel Reinforcement in RC Building Frames Using BIM and Hybrid GA

Abstract: Design of steel reinforcement is an important and necessary task for designing reinforced concrete (RC) structures. Currently, steel reinforcement design is performed manually or semi-automatically using computer software such as ETABS, with reference to building codes. These methods are time consuming and sometimes error-prone. With the aid of advanced BIM technology, steel reinforcement design could be automated for fast, economical and error-free procedures.This paper presents a BIM-based framework for automated optimization of steel reinforcement in RC building frame using developed three-stage hybrid genetic algorithm (GA). Optimization includes selection and alignment of steel reinforcement in RC building frame for the minimum steel reinforcement area, including longitudinal and shear/confinement steel reinforcement. The first and second stages optimize the longitudinal reinforcement while the final stage optimizes the shear/confinement steel reinforcement incorporating design code (BS8110) and buildability constraints. A three-storey RC building frame is analysed to check the applicability of the developed optimization framework and its improvement over current design approaches. The results show that the developed optimization framework can minimize the steel reinforcement area quickly. Automated 2D view of RC elements is then created to visualize the optimized steel reinforcement results.

Keywords: Building Information Modelling, Optimization, Interoperability, Steel Reinforcement Design, RC Frame

DOI: https://doi.org/10.24928/JC3-2017/0226

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Series: jc3:2017 (browse)
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Kiiski M

Product model based software for structural design

Abstract: Tekla Oy is developing a software package called Xbuild for the design and detailing of steel and concrete structures. The development focuses on two main areas: steel structure design and design of reinforced concrete structures. Accordingly, Xbuild consists of two main parts: Xsteel and Xconcrete software modules. The basic idea behind the Xbuild is to build a logical product model of the steel concrete structure. This product model is stored in a relational database and it is created by using sophisticated interactive 3D-modelling tools. All documentation needed for the manufacture and construction of the structure - drawings, material lists, NC-preprocessor files - can then be produced from the product model. Xsteel includes modelling tools for beams, columns, connections, plates, weldings, bolts and other components of a steel structure. Most of the standard components used in Finland and other European countries are stored in component libraries such as profile, connection and bolt libraries. The modelling is object-oriented, which makes the model "intelligent". Every component in the structure is an object in the product model database and objects can be connected to each other by certain rules. In practise this means that for instance when a beam is being moved, the adjoining joints will follow. Every object is stored in the database only once, which ensures the coherency of the database in all situations. The 3D-model, drawings and lists are just "views" to the database - all design modifications can only be made in the model. This way the user can be sure that all documentation of the model is always up to date. Xconcrete is based on the same principles as Xsteel. The main difference is that Xconcrete can also handle the reinforcement bars in an intelligent way by utilizing object-oriented techniques. The database structure of Xsteel and Xconcrete is relational. The contents of the database can be written out in any format specified by the user. This enables data transfer between Xbuild and any other product model based software. It is also possible to link other applications, such as strength analysis and dimensioning, production planning and cost calculation, to Xsteel by using an open linking inter- face. In addition to this, the Xbuild software modules include tools for creating user specified macros - a feature that enables users to develop own Xbuild "applications". Today Xsteel is used by several engineering and steelwork companies in Finland as well as abroad. Xconcrete is still partially under development and will be completed in the near future. As the construction process, codes of praxis etc. differ a lot in different countries, the requirements set on the software vary quite much from one country to another. Therefore the software has to be easy to adapt into different design environments. The results gained by the users show that the product model based approach is radically improving the productivity and quality of the design work. On the other hand it is clear that using a sophisticated product model based design software sets new requirements for the designers and manufacturers of structures.

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Full text: content.pdf (1,306,080 bytes) (available to registered users only)

Series: w78:1994 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.bestPractise (0.036567) class.represent (0.028935) class.analysis (0.028125)
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Permission to reproduce these papers has been graciously provided by VTT, Espoo, Finland.


Meinecke C, Scherer R J

Blackboard based expert system for the reinforcement layout

Abstract: This paper presents a design expert system for the layout of the reinforcement for concrete members. The system has a blackboard architecture and a hybrid structure to integrate different sources. A domain independent process model is implemented to represent the design cycle. The domain knowledge is encoded in rules and in object-oriented structures. Hierarchical planning is used in order to decompose the design task to gain more clarity for the design elements.

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Full text: content.pdf (1,536,565 bytes) (available to registered users only)

Series: w78:1993 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.analysis (0.065451) class.synthesis (0.041424) class.software development (0.028504)
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Permission to reproduce these papers has been graciously provided by the National University of Singapore. The assistance of the editors, particularly Prof. Martin Betts, is gratefully appreciated.


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