Applied Mechanics and Materials Vols. 217-219

Abstract: TiO2 composite photocatalytic film was fixed on steel by by plasma electrolytic oxidation. The microstructure of the composite film were investigated by XRD, EDS and SEM. The photocatalytic properties of the film were studied by testing the photocatalytic degradation of Rhodamine B. The results showed that the ceramic film was composed of A-TiO2 and R-TiO2. The EDS revealed that the film consisted Ti, O, Si and Fe elements. The SEM pictures showed that the film surface was rough and porous. The photocatalytic experiment results showed that the the TiO2 composite film fixed on steel by plasma electrolytic oxidation exhibited relatively high photocatalytic photodegradation of Rhodamine B, whose removal ratio reached 90% in 2 hours, irradiation of ultraviolet light.

Abstract: Retractes article: This work aims to enhance the surface wettability and adhesion of Parylene-C (poly-chloro-p-xylylene C) thin film on PMMA, glass and aluminum substrates by chemical vapor deposition. The results show that: (1) 0.56, 1, and 1.55g Parylene-C powders can deposit 200, 400, and 600nm films, respectively. (2) After oxygen-plasma pretreatment, the surface roughness of the 200nm-thickness film on glass substrate specimens decreases from 18nm to 7nm. (3) After dipped in prescription solution pretreatment, the residual stress reduces from 107MPa to 64MPa on glass substrate specimens. (4) In contact angle tests, the 600nm-thickness film on various flat substrates deposited process that has surface hydrophobic. (5) The critical load of 600nm-thickness film increases from 14.1 to 18.5mN, showing the substrate after dipped in prescription solution pretreatment can improve the adhesion of the Parylene-C thin film on flat glass substrate specimens.

Abstract: After ion nitriding, prepare composite film on surface coating processing by multi-arc ion plating. Experimentally analyses the properties of surface pattern, adhesion strength and vickers hardness in different nitrogen partial pressure. It is found that an optimum value is existed in the nitrogen partial pressure parameter designing range for obtaining optimal performance of TiAlN composite film.

Abstract: The cross section of Permanent Uni-Wall System (PUS) is formed by circular casing and special casing. As for the special casing cross section of PUS, it is difficult to calculate the shear strength because of atypical section. This study conducted a shear test for three specimens, the variable of which is the shape of the PUS cross section, without the shear reinforcing bar. The test results showed that the shear strength of the specimens had a resisting force larger than the nominal shear strength by ACI318. It was also found that the specimens of PUS’s special casing cross section and the specimen of the equivalent rectangular cross section had a similar level of shear strength.

Abstract: Concrete construction played a great role in the development of the society home and abroad especially when the developing country is at the high tide of capital construction, but its durability was affected in large measure of carbonization which has brought about huge loss in many fields like construction, water conservancy and transportation etc. Here we comprised the effects on increasing concrete anti-carbonization capacity that the present methods by blending additive or brushing protection coatings. By adapt with the development of the cracks, improved ST-9608 increased its ductility and fatigue resistance and operated much better. However, when it comes to carbonized concrete structure, proper ways and materials should be choose according to the degree of the concrete carbonizations.

Abstract: The lisht wall material is one of the major trends of wall materials currently Light weight wall material is made of active mineral powder as a main raw material and P. O cement as a cementious material. Spent foam plastic and some admixtures were added, foamed and cured in the nature under the ordinary temperature and pressure condition. The article introduces and analyzes exhaustively the strength mechanism of lisht wall material and prepares theoretical basis for the preparation of high-strength lisht wall material.

Abstract: Refractory castable specimens were prepared using industrial white fused alumina as aggregates, chromium oxide green and ultrafine alumina powder as matrix materials, solid aluminum dihydrogen phosphate (Al(H₂PO₄)₃) or liquid AlPO4 as binder materials. Effect of different binder additions on the properti_{Subscript text}es of high chromium oxide IGCC refractory castables, such as bulk density, apparent porosity, strength was evaluated and their microstructures were observed by SEM and mercury porosimetry.

Abstract: The transfer structure with web column is a new transfer structure form.The stiffness of the story was changed to analyze the influence of seismic behavior on structure in this paper, and then, the analytical result of such structure under seismic action is also discussed by using PKPM and ANSYS(FEM) , It shows that the structure can clearly improve the bearing capacity ，and some advices are given in this paper for designing this transfer structure too .

Abstract: The analytical result of the model under horizontal earthquake action is discussed in this paper, According to the analysis, this structure can effectively reduce stress and deformation. The structural potential behavior and failure principle are presented. Some advices are given in this paper for deeply studying such frame structures.

Abstract: This study presents a displacement-based design procedure for seismic retrofitting of steel frames using buckling-restrained braces (BRB) to meet a given target displacement in the framework of the capacity spectrum method. The seismic performance of a six-storey steel frame equipped with BRB is investigated. Different storey-wise BRB distribution methods are proposed and the influence on the results of the design procedure is analyzed. Nonlinear dynamic analyses demonstrate the efficacy of the design procedure showing the improvements achieved by the retrofitting intervention using BRB. The maximum top displacement registered for the retrofitted frame under earthquake excitation coincides with the target displacement obtained in accordance with the design procedure. The introduction of buckling-restrained braces enhances the earthquake resistance of the steel frame, providing significant energy dissipation and the stiffness needed to satisfy structural drift limits.