Applied Mechanics and Materials Vol. 724

Abstract: Timber structure seismic analysis is an important problem in structure design and safety of building. In this paper, full-size pseudo-static tests of two single-storey and single bay timber frame with and without infilled wall were carried out. Failure process, failure form and deformation capacity were investigated. The test results indicate that the timber frame has better capability of dissipation of seismic energy. The infilled wall can increase the seismic ability of the whole timber frame structure. There is a good collaborative mechanism between the infilled wall and frame under some construction measures.

Abstract: The housing construction grouting technique is to select a specific pressure feed approach to pour the slurry in gel into the loose soil or the rock cracks with water. The slurry, through condensation and the particles consolidation in this category, will be filled into the rock cracks in the section so as to improve the inherent nature of the soil and the mechanical properties of the other substances. During the construction period, the slurry can be fed into the injected holes within this segment through the unique role of the pressure. The small opening surrounding the grouting holes, the preset requirements will be met. Therefore, it is necessary to clarify the specific applications of grouting techniques.

Abstract: Ultimate instability of sleeve member with Q460 inner pipe and Q235 outer pipe was analyzed. Numerical models of one-ring and three-ring sleeve members were established and calculated by ANSYS. By analyzing relationship between ultimate load and stiffness ratio & slenderness ratio of sleeve members, the influence of stiffness ratio and slenderness ratio on the stability capacity was studied. Instability capacity of one-ring sleeve member was also compared with that of three-ring sleeve member. The results show that sleeve member can make good use of the high strength of inner tube, and the effectiveness is improved by increase of the slenderness ratio.

Abstract: Corrosion fatigue is of great significance in research of submarine structure operating in marine environment for long term since the seawater corrosion effect will reduce the resistance to fatigue failure of structure components. The paper interests on the introduction of pitting corrosion and analysis method of corrosion fatigue life. Finite element method was adopted to analyze the stress concentration factor of pitting corrosion and local corrosion fatigue of spherical-headed cylindrical shell with following conclusion. In the estimation of corrosion fatigue life of spherical-headed cylindrical shell, the proposed formula has some practical value, and only the corrosion fatigue of structure surface should be considered.

Abstract: A new lateral force resisting system (LFRS), referred to as the monolayer cable-stayed steel moment resistant frame (MCSMRF) system, is proposed in order to improve capacity of original MRF system and reduce lateral displacement of the system effectively. The MCSMRF integrates the respective advantages of both the steel moment resistant frame (MRF) and inclined cables, Likewise, the CSMRF renders both the dual seismic defense line and self-centering capacity. The working mechanism of the CSMRF are introduced. Secondly, the floor displacement (relative to the ground) approximation formula is developed for the MCSMRF under the lateral loading. Eventually, the numerical analysis is made of the MCSMRF with resorting to the developed approximation formula. The results show that the interstorey drift and the floor displacement significantly reduce with respect to the original steel MRF. Approximate calculation formula of elastic floor displacements can provide a theoretical basis for the preliminary design of its components.

Abstract: The application status of heavy duty corrugated paperboard and honeycomb fiberboard were reviewed. In order to contrast the edgewise compressive strength of the two typical sandwich fiberboards, the finite element models of honeycomb fiberboard and AAB flute corrugated fiberboard with large sample size were established. By numerical simulation method, the effect of structure on the edgewise compressive strength were decoupled from the factor such as the materials, material consumption, sample size and shape, processing technology and environmental conditions etc. Under the same material, material consumption and sample size, bulking analysis based on numerical method was carried out. The results show that the edgewise compressive strength of both sides of the honeycomb fiberboard is about 50% higher than that of AAB flute corrugated fiberboard, and honeycomb fiberboard is similar to bi-isotropic material. The conclusions obtained are valuable to reasonable choice of the honeycomb fiberboard and heavy duty corrugated fiberboard and correct understanding the mechanical properties of the two sandwich fiberboard.

Abstract: The constitutive relations of soil in the super-large deep foundation pit project and the law of interaction between soil and the support structure were studied. The excavation of the foundation pit was simulated. The coupling of soil and the support structure and the change in earth pressure with the progress of excavation were analyzed, and the scope of influence of foundationsubsidence was obtained.

Abstract: Design and construction of pile foundation in seaside zone face the specific geotechnical conditions. The in-situ geotechnical tests need to be conducted. The quality feature of the piles is assessed according to the results of in-situ small strain test, coring test and pile stress test. For different depth of rock and soil stratum and pile bearing layer, the trial pile stress distribution results and follow-up stress and settlement monitoring provide engineering parameters for design and pile-driving.

Abstract: With the significant increase in road traffic, part of structure of the tied arch damage situation is serious. There were all kinds of diseases, which affected the bridge carrying capacity, performance and durability. In order to maximize the use of existing resources, extend the expected life of the bridge and meet its normal state requirements, scientific and reasonable repair and reinforcement have become particularly important. Currently, a new reinforced concrete tied arch hanging and pull synergistic active reinforcement technology research is being studied, which is different from replacing the old suspenders, including additional vertical suspender synergistic reinforcement technology and tilted belly poles to change the system technology in two categories. In this paper, taking Ba Lidian Bridge as an example to mainly analyze additional vertical suspender synergistic reinforcement technology. The results show additional suspender active reinforcement method is a simple way to improve the bridge structure force.

Abstract: The 100% frontal crash and side impact performances of a passenger car are analyzed and compared with tests. The structural optimization of the Closed Body-in-White (BIW) is divided into two stages which are 100% frontal crash safe part optimization and side impact safe part optimization. Use the Optimal Latin hypercube (Opt LHD) design method to generate sample points. Take the Radial Basis Functions (RBF) neural network method to establish optimization approximation model. The non-dominated sorting genetic algorithm (NSGA-II) was used to conduct multi-objective collaborative optimization design. The results show that the total mass of the closed BIW is reduced 9.745kg; the light weight rate was 10.27%. The Crashworthiness performance of the closed BIW does not change obviously.