Advanced Materials Research Vols. 374-377

Abstract: To research the mechanical behaviour of the novel composite beam with concrete filled steel tubular (CFST) truss, an experimental study of simple composite beam subjected to monotonic loading is described. A test program was developed to investigate failure models and working mechanism of the typed composite structure. Load-deformation curves, deflection regulation, strain distribution of beam were analyzed and asserted. The experimental and analytic results show that the typed composite beam has high strength, excellent ductility, and torsion performance. It can be used the large span bridges and high rise buildings.

Abstract: In order to estimate the carbon footprint of bridge during whole life cycle, a quantitative model is established in this paper. The life cycle is divided into five phases as design, manufacturing, construction, operation & maintenance and demolishing. According to energy and resource consumption, the carbon footprint of different source, such as material, transportation, construction, facility etc, is accounted according to the criterion of mass and cost. The carbon intensity index is proposed considering the feature of bridge engineering and economic cost. A multi-level assessment method is developed based on modified analytic hierarchy process and comprehensive variable weight analysis. As a case study, south lake bridge in Wuhan is analyzed, the assessment results indicate that the carbon intensity of this bridge is between small and moderate, and the carbon footprint is mainly concentrated in the phases of manufacturing and construction. The carbon footprint model and carbon intensity index assessment method which combine environmental impact together with economic cost, are of high applicability in real bridge project, and could be used as a reference for bridge management section to assess the life cycle environmental impact.

Abstract: The bottom-frame structure is a kind of small bay masonry structure building with large bay RC frame in bottom[1], it is widely exists near streets in China because of the economy and applicability. But for the poor correspondence capacity for foundation’s deformation, it is easily be damaged for this kind of building in uneven settlement. It can provides theoretical support for design and strengthening works of such kind of structure buildings by analyzing the relation between superstructure’s stiffness and settlement of foundations, which has practical significance. For the complexity of stress of the composite structure, ANSYS is used in this analysis. A strengthening project based on this theory is introduced in the end, it validates the feasibility of the conclusion.

Abstract: Abstract. Dali boasts brilliant local culture and ethnic folk customs.Dali culture is a fusion of cultures such as the central plain, Tibetan culture, southeast Asia culture and the local ethnic culture ; is also a long history of brilliant ancient culture in China's southwestern minority region;and is an important part of Chinese culture.This article through analysis of space layout of Dali Bai local-style dwelling houses building to idendity the rationality and possibility of combining it with local new rural construction.

Abstract: Abstract. The large number of basic random variables in stochastic process, cause great troubles for calculation and analysis. Based on twice orthogonal expansion in the stochastic process and the expression of uncorrelated random vectors by use of orthogonal functions originate from a single source random variable, a method of triple orthogonal expansion for a stochastic process is put forward ,which can simulate a stochastic process with only one random variable. Example calculation shows the effectiveness of the monophyletic analysis method (MAM).This method can be applied for the other stochastic analysis based on the correlation theory.

Abstract: From 2006, authors started a series of experimental and analytical studies to establish a design method for a new connection system of concrete filled steel tube (CFT) by using built-in reinforcing steel bars (CFTR). Among the series, a pullout test of the built-in steel bars from the CFTRs has been early performed, which is orientated as a fundamental study for the connections of CFTR [1]. In the pullout test study, it is clarified that the influence of tube shapes (square and circular), the stress transfer capacities of bond by steel bars, ring bands in steel tubes and anchor plates of steel bars. The new connection system of CFTR may apply to an exposed-type CFT column base, where the built-in high strength steel bars contribute to transfer the axial force, bending moment and shear force from a CFT column to the foundation [2, 3]. The column base strength is much increased by the built-in steel bars. In other words, the built-in steel bars make the base plate and anchor bolts compact without any strength reduction in the column base. A stable elastic-plastic behavior is observed in the CFTR column base, and an evaluation method of the ultimate strengths is proposed for that. A further improved CFTR column base is the base without any base plate (non-base-plate CFTR column base), so that all of the stresses can be transferred through the built-in high strength steel bars [4]. A stable hysteretic behavior is observed in the column base, and the evaluation method of the ultimate strength is also proposed. It is noteworthy that the non-base-plate CFTR column base is applicable to the super high strength steel, because the base system does not require any full penetration welding, which sometimes causes brittle fracture in super high strength steel.

Abstract: Passive solar control solutions have been widely used in buildings in tropic countries like Malaysia. It is assumed that these solutions may notably control the heat-gain of buildings. However, there is a lack of empirical studies that assess the extent of green-glazed techniques to sufficiently control solar heat-gain. The current study uses a case study approach to examine the thermal indoor performance, particularly the near-glazed workplace area. The performance of the ST Diamond Building (in Putra Jaya, Malaysia) has been examined in terms of: outdoor/indoor dry bulb temperature; glass surface temperature; heat flux through glazing; outdoor/indoor air movement; lux and; solar radiation. The results of the field analysis indicated that ST Diamond Building’s green-glazed solutions are efficient to control solar heat gain, which in turn will lead to reduce energy consumption for controlling solar heat loads.

Abstract: In recent years, due to its excellent mechanical properties, especially its insensitivity of strength to thickness, high-rise structural steel with high performance and heavy thickness made in china was applied more and more widely in large-span and high-rise steel building structures. However, there are no reasonable design indexes based on design reliability analysis for the new material in relevant national standards. The high-rise structural steel was often used as H-section column with heavy thickness at present, and its residual stress distribution has significant influence on load-carrying capacity, which is one of the critical factors in reliability analysis of elementary members using high-rise structural steel. In this paper, with the block sectioning method, a detailed experimental investigation on the longitudinal residual stress distribution for H-section (H800×800×80×80mm), made from Q345GJ high-rise structural steel with thickness of 80mm is introduced. The contour of residual stress distribution in the whole section based on test was presented, and the regularity of the residual stress distribution of such a section was discussed. Meanwhile, the contour of yielding strength distribution in the whole H-shaped section with heavy thickness was obtained. It will provide some basic data for reliability analysis and further investigation of the structural members using high-rise structural steel.

Abstract: This paper gives a simple introduction of the development and structural behaviors of cold-formed thin-walled steel structure under shear loads. An overview of existing research on shear performance of cold-formed thin-walled steel composite walls with openings is given. This paper summarizes and arranges the data of such experiments on composite walls with openings. Finally, with the use of SPSS (Statistical Product and Service Solutions) software, this paper makes a regression analysis, and gets an equation of reduction ratio considering openings.

Abstract: In present work, first the multi-storeyed building was analysing taking medium site condition in zone II. Sa/g and Base shear for that building was calculated from IS 1893:2002 (Part 1).After that site specific ground response analysis is carried out for Amravati and Nagpur region soil sites. For development of site specific response spectrum ProSHAKE software is used ProSHAKE is based on one dimensional geotechnical site response model. Site response study is usually carried out using the geotechnical data or Geophysical data (shear wave velocity). Basic aim of present work is to study local site effects on seismic analysis of multi-storeyed Buildings, for this purpose local soil conditions are considered. In the present work various local sites in Amravati and Nagpur region are studied.