Advanced Materials Research Vols. 430-432

Abstract: The low cycle loading tests of 3 pieces of recycled concrete latticed walls under different side column reinforcements and different axial pressure ratios are conducted. The failure mode, failure process, hysteresis curve, ductility, and energy dissipation of the walls are studied. The experiment results indicate that the failure mode of recycled concrete latticed wall under the cyclic load is shearing failure. It can enhance the ductility of the wall, distortion ability, and the earthquake resistance performance, with increasing the axial load ratio. It can enhance the ultimate load and restrain the crack development by increasing the reinforcement of the side columns.

Abstract: Energy is an important material base to the live and development of human beings. To solve the lack of the renewable energy which maybe occurs, on one hand, we should advocate vigorously saving energy. On the other hand, we should explore more renewable energy actively such as solar energy, geothermal energy, wind energy, biological energy, etc. The method is to analysis technology using of solar energy and methane gas energy in this paper. Aim to come up with renewable energy technology using measures for the new rural ecological residential construction technical support and provide theoretical guidance.

Abstract: On the basis of unloading rock mass theory, we identify the excavated rock mass parameters by means of neural network training in each step, in which the subjective factors of the parameters selected process have largely been decreased. Through inducing the parameters of inversion into two -dimensional modeling, we aim to do the numerical simulation computing in various conditions. By comparison, the calculated displacement trend of the measuring points following the multi-point extensometers is basically identical with the monitoring displacement trend.

Abstract: The Secondary Element in the Network of Hydrostatic Transmission with Secondary Regulation is a kind of advanced technique with good control and application properties, it has extensive prospect in the energy conversation application. From these characteristics, this paper presents several kinds of energy-saving and reuse of Energy technologies with Secondary Regulation, comprehensively analyzes and explains its’ application prospects and research directions in Hydraulic Elevator System.

Abstract: In the process of construction, it is essential to determine the surrounding rock pressure, which needs to propose the simulation model according to relevant theory, and calculate and analyze the surrounding rock stress, to guarantee the safety of the tunnel construction and operation. However, this has been no perfect calculation theory and formula for surrounding rock stress to unsymmetrically loading tunnel (ULT). The constructed method of failure modes on the shallow ULT are proposed, together with the failure mode for the shallow unsymmetrically load single tunnel, based on the basic assumptions and basic theories of limit analysis method (LAM).

Abstract: Based on three-dimensional finite element method (FEM), an accurate electro-mechanical impedance (EMI) model for a damaged cube structure is established in the paper. The damages are simulated by the reduction in Young’s modulus in the certain area of the cube structure. A coupled structural system consisting of PZT patch, bond layer and host structure is taken into account. Both the effects of the damage severity and damage propagation on EMI signatures are then investigated. The numerical computation indicates that the present EMI model can be employed to detect the damages in the structures.

Abstract: This article describes the development of a dedicated controller for HVAC control, and introduces the hardware interface circuits about some main chip on controller. In addition, the article also explains composition and principle about control software applied to the controller, further more points out that the fuzzy control algorithm is more reasonable than the PID algorithm for most HVAC control and dedicated control strategies play an important role for HVAC control.

Abstract: Packing unequal disks in a container as small as possible without mutual overlap is a NP-hard problem with a plenty of real world applications. In this paper, we introduced iterated local search to tackle with this problem, and using Critical Element Guided Perturbation (CEGP) strategy to jump out the local minimal, and using BFGS method to get each neighborhood optimized in local search procedure. Experiments showed its efficiency by breaking several world records of a set of benchmark.

Abstract: The designing course of curve steel box girder always needs to consider the city roads and buildings.It make the bridge position not only span the traffic below,but also avoid the house building all around [1].So curve steel box girders always have bigger span,smaller radius and the settled pier position.Also,because of the light weight and the prominent effect of bending-torsion coupling [2],the supporting points of steel box girder often suspend under the improper designing.It impact the safety of bridge vastly.Seriously it can make bridges topple.This paper take the designing course of a minor radius curve steel box girder as background to research change law of counter force and internal force of steel box girder in different supporting point arrangement.

Abstract: The advantages of the dust control by foam are demonstrated, such as the high covering power, large contact area, high wetting speed and good isolation performance, which can control the dust efficiently. In consideration of wetting and foaming capabilities of the foam, a new kind of foaming agent with high foam expansion and wetting ability is developed after a large number of filtering and compound experiments by the ROSS-Miles method and water film flotation process method. After the experiments of the foaming ability and the wetting ability to different dust grains with different particle diameters, the results show that the new foaming agent can reduce the surface tension of solid and liquid materials rapidly with good foaming and wetting abilities. After the experiment of experiments, the best additive concentration of the new foaming agent is 0.5%, and a complete new experimental system is set up to produce foam, and the dust-control foam with high performance is produced using new foaming agent.