In this paper, original extension of classic deformation method for global elastic analysis of steel construction with semi-rigid connections is developed. The original calculation for steel frame structures with semi-rigid connections...

This paper introduces algorithms for computer-aided calculation, based on a proposed computational model for stay cables, decomposed from a bridge’s structural system. These algorithms determine the necessary tension forces and corresponding deformations in the cables for individual strand tensioning using lightweight hydraulic jacks. Two tensioning methods are discussed: the first involves single-cycle tensioning with varying force intensities, while the second employs multiple cycles by applying forces of constant intensity until achieving an equalization of forces in all strands of the cable. The efficiency of the proposed procedures is demonstrated through a numerical example.

Regular surveillance, data acquisition, and visual observation of high embankment dams are extremely important for the stability analysis of these structures. The stability issues that could occur during a dam's lifetime are mainly related to slope i...

The use of welded structural hollow sections in civil engineering is relatively new. Design of connections in steel structures with welded structural hollow sections requires a more specified approach, compared to traditional connections achieved with gusset plates. Stress and local deformations at the connection area are non-linear and very complex. This paper presents the application of non-linear numerical analysis for the determination of the ultimate bearing capacity of “Y” connections. In the analysis, a non-linear material model was applied. In order to validate the applied method of steel modelling, comparative analysis of the analytically and numerically determined ultimate bearing capacity with the experimentally obtained results has been conducted.

Applying DFMA (Design for Manufacturing and Assembly) principles is crucial in the process of designing models for wind tunnel testing. The design process, especially of models for measuring the pressure distribution, takes several months. Production of these models require a minimum couple of months; sometime even more. The manufacturing with defects are not allowed. Very narrow time limits, defined by a contract, do not leave enough time for reworking. Very often, designers may not have knowledge of manufacturing rules and best practices - resulting in slower product development cycles, increased ECO/MCO (Engineering Change Order / Manufacturing Change Order), significant material waste and lower production yields. Manual reviews of Design or consultations with manufacturing experts are time consuming. Whole process need for proximity between design and manufacturing engineers. Design engineers need quick and interactive feedback while designing, integrated access to company’s manufacturing knowledge repository. This paper presents an automated application DFMA principles, applying the rules defined in the prototype production of wind tunnel models in Military Technical Institute.

Replacing or upgrading software packages requires a detailed analysis and testing. This is especially important for software modules that are part of the production process. Machining of free-form surfaces always requires using of a five-axis milling machine. Tool path post-processing for these machines always attracts special attention. The most important part of the postprocessor is implemented IKS (Inverse Kinematic Solver). Implemented IKS in the postprocessor must accurately describe the kinematics of milling machine in the production plant. Military Technical Institute performed parallel testing of two postprocessing modules of CAD/CAM system Siemens PLM NX: and old GPM (Graphics Postprocessor Module and a new module MOM (Manufacturing Output Manager). Complete analysis was sent to the NX support center and application engineers confirmed that the old and new postprocessors do not behave identically. The paper describes in detail the analysis and explains the solution of the presented problem.