The study presents the simultaneous cost, topology and standard cross-section optimization of single storey industrial steel building structures. The considered structures are consisted from main portal frames, which are mutually connected with purlins. The optimization is performed by the Genetic algorithm (GA) approach. The proposed algorithm minimizes the structure’s material and labour cost...

ommunication from within the steel pipeline by inspecting or sensing tools or robots is usually performed via a cable. As the length of the tether restricts the communication distance and as the cable may encumber the tool’s movement, we explore the feasibility of acoustic communication from within the liquid-filled pipe to an external sink through the steel pipe walls. The paper derives the so...

This paper first analyzes the tilting reasons of a steel-concrete building in Zhangjiakou city in China. Then, a jacking rectification method which combines the pie-cutting method and the excavation of stress release trench was put forward. This analysis method uses the three-dimensional numerical simulation for soil settlement and vertical displacement and internal force of upper structure in ...

A luminescence pulse is observed from laser-created bubbles in pressurized liquid nitrogen and argon, occurring at the first collapse point of the bubble motion. The duration of the light pulse depends linearly on the bubble size, ranging from 200 ns to 1 micros for bubbles with maximum diameters between 0.2 and 1 mm. The spectrum of the light consists entirely of atomic lines, which surprising...

Steel is one of the most important materials for building a wide variety of products. The downside of a wide usage of steel is the energy-intensive production process and the high output of carbon dioxide. In our efforts to make the production of steel more sustainable, we focus on one step of the steel production only, the conversion of raw iron to high quality steel in a Basic Oxygen Furnace ...

Preliminary note The pipes and the pipe walls are of the utmost importance to all power plant facilities. Under exploitation, they are subjected to effects of aggressive media, high temperature corrosion and possible mechanical damage. Consequently, special attention is paid to the control of material properties during the power plant construction in order to minimize the risk of flaws or failu...

As global interest in using engineered wood products in tall buildings intensifies due to the “green” credential of wood, it is expected that more tall wood buildings will be designed and constructed in the coming years. This, however, brings new challenges to the designers. One of the major challenges is how to design lateral load-resisting systems (LLRSs) with sufficient stiffness, strength, ...

Traditional passive noise control techniques using Helmholtz resonators have size limitations at low frequency due to the long wavelengths. Promising noise reductions, with flush mounted Stainless Steel patches with no such constraints can be obtained building on local resonance phenomenon implemented in acoustic metamaterials techniques. The objective of the current paper is to introduce local...

This research effort focuses on the evaluation of existing design standards for cold-formed steel stud walls and the development of retrofit wall systems. Full-scale wall systems are tested under uniform static pressure using a vacuum chamber. The resistance functions obtained are used to model the dynamic behavior of the walls and to predict performance under blast conditions. This paper focus...

This article is focused on the description of the main features of an online system for the real time monitoring and prediction of the liquid steel temperature in the ladle and tundish. Monitoring and prediction are based on a combination of analytical and statistical methods. Thus e.g., the temperature profiles of the walls are calculated using multi-layer implicit difference scheme taking int...