Opis
The durability of concrete structures is commonly considered in all domains of building activity. One of the promising methods for the durability improvement of con-crete surface is application of controlled permeability formwork (CPF). Nowadays, a number of advanced materials designed to be effective as linings in formwork is com-monly available. The actual effectiveness of such formworks depends significantly on the concrete mixture, its placing and compacting, and many other factors. Despite the good results of individual tests, many aspects of the problem have not been clarified yet. The recent tests were mostly done on specimens and very few results concerning the effects on entire members have been published so far. Apart from different tests on basic properties of concrete surface – like hardness, abrasion, tensile strength, resistance to water penetration and absorption, chloride diffusion, carbonation, frost resistance – the tests presented here were focused on the effectiveness of reduced concrete cover. Spis treściAndrzej AJDUKIEWICZ On durability aspects of concrete members formed against permeable formwork 7 Carlo CINQUINI, Matteo BRUGGI On the use of mixed finite elements in topology optimization 17 Sélim DATOUSSAID, Guy GUERLEMENT, Thierry DESCAMPS Applications of evolutionary strategies to optimal design of mechanical systems 35 Krzysztof DEMS, Jacek WIŚNIEWSKI Design of fibre layout in multilayer composite using hybrid algorithms 53 Wojciech DORNOWSKI, Piotr PERZYNA Numerical investigation of localized fracture phenomena in inelastic solids 79 József FARKAS, Károly JÁRMAI Distortions and decrease of load-carrying capacity of welded structures due to residual welding stresses 117 Adam GLEMA Physical and numerical aspects of dispersion phenomenon in solids under impact loading 127 Jan GRABACKI,Iwona JURCZAK-BROSZKO, On geometry of porous medium 147 GREEN,Radoslaw L. MICHAŁOWSKI Shear band formation behind a retaining structures subjected to seismic excitation 157 Michał GUMINIAK, Ryszard SYGULSKI Initial stability of Kirchhoff plates by the boundary element method using a modified formulation of a boundary condition 171- Tomasz JANKOWIAK, Janusz KLEPACZKO, Tomasz ŁODYGOWSKI Numerical modeling of wave propagation and interaction in bars 187 Daniel LAMBLIN, Laurent VAN PARYS, Thierry DESCAMPS A simplified numerical approach of arches affected by horizontal spring displacements 201 Tomasz LEWIŃSKI On the fundamental problem of opti mum design of anisotropic plates 215 Zenon MRÓZ, Dariusz BOJCZUK Topological sensitivity derivative: application in optimal design and material science 229 Udo NACKENHORST Computational methods for studies on the biomechanics of bones 251 Pauli PEDERSEN, Niels L. PEDERSEN On modeling and optimal design of beambridge structures 273 Anna STANKIEWICZ, Jerzy PAMIN Gradient-enhanced Cam-clay model in simulation of strain localization in soil 293 Erwin STEIN, Franz Otto KOPP, Karin WIECHMANN, Gerhard WEBER Calculemus! New research results and functional models regarding Leibniz four function calculating machine and binary calculating machine 319 Czesław SZYMCZAK The effect of nonlinear restraint on torsional buckling and post-buckling behaviour of a thin-walled column 333 Zenon WASZCZYSZYN, Marek SŁOŃSKI Bayesian neutral networks for prediction of response spectra 343 Marcin WIERSZYCKI, Witold KĄKOL, Tomasz ŁODYGOWSKI Fatigue algorithm for dental implant 363 Janusz WOJTKOWIAK, Czesław OLEŚKOWICZ-POPIEL Investigations of butterfly control valve flow characteristics 381 Peter WRIGGERS, Kishor CHAVAN Beam and shell elements for thin-walled aluminium structures 397 Krzysztof ZIOPAJA, Zbigniew POZORSKI Damage detection and estimation using wevelet transform 413