Applied Mechanics and Materials Vols. 94-96

Abstract: With the development of bridge reinforcement technology, various reinforcement methods has matured, however, just rely on a reinforcement method can not meet the current needs of the project. With carbon fiber reinforced polymer and external prestressed strand to reinforce hollow beam is a comprehensive and effective reinforcement method, we study the combined reinforcement mechanism of carbon fiber reinforced polymer and external prestressed strand through the true type hollow beam experiment, and lay the foundation for the promotion of composite reinforcement technology.

Abstract: This paper adopts the ANSYS software to establish the profiled steel sheet and concrete composite slab finite element model. Numerical simulation is made to the composite slab in the whole process from initial loading to loading failure with reasonable Stimulation material and constitutive relations. The result of the calculation shows that promoting the strength of the concrete can largely promote the bearing capacity of the concrete, and the influence of the strength grade of the profiled steel sheet to the bearing capacity of the composite slab is smaller. The experimental result and test result accord well, testifying the reasonability of the established finite element and provide new method and way for simulating the load bearing process of composite slab.

Abstract: A few consolidation solutions of soil-cement pile have been derived by the assumption that the coefficient of volume compressibility and coefficient of permeability of soil and pile is constant. However, the value of coefficient of volume compressibility and coefficient of permeability of soil and pile varies along depth during the consolidation process with the increment of effective stress of soft soil and pile. In this paper, the e–logσ′ and e–logk linear relationship is used to describe the stress-strain and strain-permeability coefficient relationship of soft soil. The nonlinear compressive character of soil-cement pile is considered. The semi-analytical solution is obtained by dividing the computing unit and segmenting the consolidation time. The coefficient of volume compressibility and coefficient of permeability of soil and pile can be assumed to be constant at any soil layer during any time interval. The initial conditions of computing unit can be confirmed by the calculation results of last time interval. Finally, some nonlinear consolidation properties of composite ground are analysed.

Abstract: This paper takes the engineering project of push-pull type hangar door as an example, applying the large-scale general-purpose program STS in PKPM software to build a spatial model, PMSAP program to analyze the rods with finite element, and STS program to design connection of nods and post-processing of construction drawings. It puts forward an effective solution when designing similar steel door and special steel structure and provides guidance for practical engineering design.

Abstract: The analysis of structural plane in rock slope is of vital importance to stability analysis of rock slope. In this paper, Bayesian method was adopted in the analysis of shear strength parameters along the fault in the West Slope of Upper Reservoir, Shisanling Pumped Storage Power Station. Full advantage was taken of the geological information outside the structural plane along with the practical experience of on-site engineers. The statistical estimation problem of small samples thus was successfully solved. The determination of sliding plane in rock slope is another key issue in the stability analysis of rock slope. The cracking process was utilized to track the most possible sliding plane in the slope. In consideration of the randomicity of both mechanical parameters of rock and structural plane and resistance of slide resistant piles, reliability index of slope stability was established with the aid of discretized dimensional reduction method of reliability and conditional probability.

Abstract: A passenger station in Hongkong with a special structure whose roof is supported by nine mega columns which are linked in the middle by joints. The conventional design standard are inapplicable and alternatively for this structure, the design of the supporting columns of the passenger stations was verified by both finite element analysis and manual calculations. The results are consistent with each other.

Abstract: With the rapid development of high-speed passenger railway and inter-city railway, highway passenger transport is facing an unprecedented competition and pressure. The impact of high-speed railway on highway passenger transport has been analysis and the transport characteristics of high-speed railway are compared with the highways’. On the basis of the travel choice behavior of passengers analysis, the systematized countermeasures of highway passenger transport are put forward including precise orientation, strengthen marketing enhancement, technical support, resource integration, brand service and government help.

Abstract: Based on the Xiangjiaba Hydro Project, dynamic characteristics of large high-rise structure under El_Centro seismic wave were investigated in this paper. 8-node hexahedral isoparametric elements[1] are used to the solid element in the 3-D finite element model. In order to increase the efficiency of the calculation, the Newmark- [2] method is implemented. By means of seismic waves, the displacement responses of the Xiangjiaba Hydro Project are analyzed in detail. The results, which are obtained for displacement responses of tower columns of ship lift, show that calculated dynamic results of the tower column can meet the design requirements.

Abstract: The influence of the wind coefficient distribution on coal reservoirs for coal gangue is very important to its wind-resistance design. Take a real coal reservoir in Ordos for example, the wind pressure is numerically simulated with the help of Fluent Software. Because of the coal gangue piples, the average wind coefficient absolute obviously reduced under most of the wind directions, but the local area on the surface and leeward side the average wind coefficient absolute will increase significantly under the certain wind directions. Anyhow, the coal gangue is important to the wind pressure distributions of the coal reservoir and can't ignore its effect in the actual engineering design and should be given more attention.

Abstract: In this paper, the elasto-plastic dynamic analysis on the steel spatial arch truss with 90m span and 0.2 rise-span ratio is carried out under earthquake wave with SAP2000. In the analyses, the geometric and material nonlinear effects are considered simultaneously based on the plastic-hinge theory. Under the action of EL-centro wave with the peak increasing gradually, its elasto-plastic dynamic responses have been obtained. The results show that its failure mode under the earthquake action is elasto-plastic dynamic buckling; that its critical peak acceleration of EL earthquake wave when applied in X direction is 550gal, and is 675gal when applied in Z direction; The ratio of its maximal node horizontal displacement and its rise height is 1/635, and its displacement ductility coefficient is 1.262 and the ratio of its bars with plastic hinge appearing when buckling is 2.45% when EL-Centro waves applied on structure in X direction; The ratio of its maximal node vertical and its structural span is 1/99, and its displacement ductility coefficient is 19.207 and the ratio of its bars with plastic hinge appearing when buckling is 9.18% when EL-Centro waves applied in Z direction.