Applied Mechanics and Materials Vols. 99-100

Abstract: Abstract. The dynamic behavior of structure subjected to local damage is investigated using conceptional removal methods recommended in the General Services Administration (GSA) guidelines. Two types of local damage are considered, namely, the speed and location of failure. The study is conducted on designed seven-story prototype buildings by applying dynamic liner analysis. Based on the simulation, it is concluded that dynamic effects are important considerations properly representing structural behavior in a robustness analysis of structure. The results also show that corner column play more important role in prevention of structural collapse than interior column. The resulting information would be valuable for protecting structures.

Abstract: This paper deals with an isolation design methods of buried segment pipeline for large ground displacement in earthquake. The buried pipeline is always damaged due to the strong shaking and earthquake-induced large or permant ground displacement and deformation (PGD), including liquefaction, rock and soil slope failure, fault and fissure. Based on the seismic response analysis for buried segment pipeline, the isolation mechanism and an equipment for resisting ground displacement trigged by liquefaction and fault is presented in this paper. Some related parameters to isolation system like stiffness and damp of isolator, soil types and its displacement, depth of pipeline, are discussed for developing a reliable isolation system fitting the buried segment pipeline.

Abstract: With the development of high-speed railway, roadbed reinforcement of its use of high strength prestressed concrete pipe pile, and reflected wave method with low strain and slow preloading method for integrity testing of the pile and pile load test, according to “Technical specification for testing of railway piles” TB10218-2008 requirements, slow static test of the maximum load of not less than 2 times the design load; pile field under construction, the pile placed on top of limestone , pile bearing stratum good features, especially more complete proposed limestone pile placed on top of limestone (rock) of the pipe, the static test pile to take the maximum load of 1.2 times the design load, and load and take Q-s curve of settlement, maximum springback quantity and the corresponding settlement is vertical bearing capacity characteristic value of single pile.

Abstract: The strength, expansion and amount of scaling of concrete with compound mineral admixture (CMA) from steel slag, granulated blast furnace slag and fly ash were studied. The result shows that damage by crystallization press from sulfate attack when concrete was exposed to sulfate environments under wetting–drying alternation is much larger than that from sulfate chemical attack. Adding CMA to concrete could reduce the damage from expansion of concrete caused by sulfate chemical attack, but the resistance of concrete to damage by crystallization press from sulfate attack was remarkably reduced.

Abstract: In this paper, the concept of "the amount of bending reinforcement" is introduced, the unified formula of the calculation of flexural members strengthened by selecting the axis of a reasonable balance is obtained, a way of explicit calculation is found. the concept of formula of the calculation of flexural members strengthened is clear and the calculation is simple.

Abstract: By analyzing the reuse ways of the reclaimed materials in BedZED project, the article concludes that operability and economic costs of construction restrict the reuse of the reclaimed materials, and it recommends increasing the construction operability by selecting materials that are easy to use and to refurbish, and it also recommends selecting a reasonable way to reduce construction costs.

Abstract: By Discussing the characteristic of dynamic compaction and principium simply, in order to advance the effcct of improvement of dynamic compaction, dynamic compact ion-prefabricated drain was brought forward, and the strengthened behavior of dynamic compaction-prefabricated drain was discussed briefly,at the same time introducing the test ir-situ of a engineering in which this method is adopted. Based on the result of test, evaluating the practicability and effect of this method, scientifically and reasonably.

Abstract: Efficient use of public funds for structural integrity of bridge networks requires an effective bridge asset management technology. To achieve this, a reliable deterioration model is essential in any Bridge Management System (BMS). The deterioration rate is calculated based on historical condition ratings obtained from the structural element-level bridge inspections. Although most bridge authorities have previously conducted inspection and maintenance tasks, these past inspection records are incompatible with what are required by a typical BMS as input. Such incompatibility is a major cause for the deficiency of the current BMS outcomes. Artificial Intelligence (AI)-based bridge deterioration model has recently been developed to minimise uncertainties in predicting deterioration of structural bridge members (e.g. beams, piers etc). This model contains two components: (1) using Neural Network-based Backward Prediction Model (BPM) to generate unavailable historical condition ratings; and (2) using Time Delay Neural Network (TDNN) to perform long-term performance prediction of bridge structural members. However new problems have emerged in the process of TDNN prediction. This is because the BPM-generated condition ratings are used together with the actual condition ratings. The incompatibility between the two sets of data produces unreliable prediction outcomes during the TDNN process. This research is thus to develop a new process based on the existing method, thereby overcoming the abovementioned problems. To achieve this, the actual overall condition ratings are replaced by the BPM forward predicted condition ratings. Consequently, the outcome of this study can improve accuracy of long-term bridge deterioration prediction.

Abstract: With the social and economic transformation, China's urban residential space has become more evident on differentiation between rich and poor, the rich class occupied the central city, the vulnerable groups was marginalized, social problems highlighted. Based on this, residential space planning should reflect the public properties to illustrate social equity and justice. This article based on research on urban social choice theory, analysis of urban social choice and social ecology, urban residential space is proposed countermeasures planning to achieve social choice and personal preference in choosing a blend of residential space.

Abstract: Traditionally, the computer method of delineation requires to establish ore block model. The block-by-section scanning operation is slow, which does not meet the large amount of data calculation., In this paper, we use the ore body in the modeling of the surface model in order to overcome the above problem. This model uses modeling method that reproduces a traditional hand-paintedtechnique, describe the spatial distribution of ore bodies through a series of plan view or profile of the ore body boundary polygon for wireframe modeling, i.e., the frame modeling method. For reading the plan view or profile of the ore body, the graphics and fractal theory are needed in the work to achieve the extraction of vector graphics map elements. After completing the extraction of ore, the wireframe modeling of the ore bodies can be established by using wireframe modeling method. Finally the wireframe model is filled by using the OpenGL technology and the surface model orebody is generated.