Applied Mechanics and Materials Vols. 71-78

Abstract: Considering the engineering background of high speed transportation systems such as maglev, vertical vibration of a flexibly connected double span beam is studied. The beam can be taken as two Euler-Bernoulli beams flexibly connected by an elastic joint and the model of it bearing moving distributed load with constant speed is then established. Duhamel integral as well as mode superposition method is applied to solve the dynamic responses of the beam. Numerical analysis base on different parameters such as the length of the train, the span of the beam and the velocity of the train are compared. The following conclusions are made:(1) the left span and right span’s dynamic responses is different so that each span should be analyzed separately; (2)the dynamic response of the beam is tied up with the factors such as the frequency of the beam, the moving frequency of the load and the relative bending stiffness of the joint.

Abstract: Based on the analysis of the trends of building energy consumption and the situation of standard of building energy efficiency, the thought of system development for building energy efficiency design and engineering quality management based on Network is proposed. Data control processes, modules and functions of system is introduced. This system is an opening system; it has better adaptable to change of standards.

Abstract: A series of tests based on large scale model are designed to study dynamic response of pile-broad subgrade, aiming at structure’s response towards different load frequency and structure’s performance under long-term dynamic load. The test results indicate that dynamic stress of reinforcement and soil decrease slightly with load frequency, while accelerations trend to increase. Soil under loading plate has certain supporting effect because stress of reinforcement is smaller in test group with soil remains. Performance of pile-board subgrade under long-term dynamic load is steady and reliable since none of stress and displacement varies obviously when loading times increase to 10⁶. Ultimate bearing capacity of pile-board subgrade is much bigger than actual demand, so the structural type of pile-broad plate remains to be optimized.

Abstract: Subway shield lining segments are highly sensitive to peripheral soil disturbance. Shield displacement may destroy the whole structure which can not be repaired, and directly affects the subway operation safety at the worst. Therefore, it is necessary to reasonably determine the construction technology, in order to avoid the unfavorable influences caused by construction disturbance. According to the pile-board subgrade scheme which is adopted by the comparison of schemes, also considering the high risk of over-shallow-embedded metro construction, we put forward the key construction technique of pile-board subgrade, including: technique of casing tube bored pile, construction process of pile-board structure and monitoring of settlement and deformation which are important to guide the similar projects.

Abstract: Based on the construction principle of green residential community water-saving performance evaluation index system, we built the green residential community water-saving evaluation index system, and use Analytic hierarchy process (AHP) to make sure the weigh of each influence factors, then we construct the fuzzy comprehensive evaluation model, also analyse the case of a residential community in Jiangyin city, conclude the result of evaluation.

Abstract: There is all kinds of risk consisting in every logistic transportation link of construction because of the bigger construction transportation district and the more complex transportation goods, a wide variety, quantity, and so on. Any question in a single of earlier link happened will affect accuracy, security and timeliness of indicator. This paper constructs evaluation index system and evaluation module by Analytical Hierarchy Process (AHP) and Fuzzy Comprehensive Evaluation(FCE).

Abstract: On the basis of comprehensive green construction concept in China, This article focuses on the construction design of how to strengthen and highlight the green construction planning, and how to reflect the organization of green construction, concept, target system, correcting, enhancing and other links, through the green construction planning during the entire process of construction. As we know, the construction design is a programmatic document to guiding the construction, if in the entire process, gives full expression to the idea of green construction plan, and then, for the promotion of green construction will have a positive effect.

Abstract: There is he bigeer product oil distribution district and the more complex distribution goods, a wide variety, quantity, and so on. Vehicle is a necessary factor about product oil logistics distribution , and reasonable vehicle configurations on logistics distribution and service level will have direct influence. The research of the vehicles in product oil logistics and distribution is Combined with product logistics distribution and logistics service system of allocation problem. Through the research we can draw reasonable vehicle configuration. It can improve service quality, meet customer needs , reduce distribution costs and improve the competitiveness of enterprises. The research provide decision support for oil distribution center vehicles allocation problems.

Abstract: This paper attempts to illustrate Uncertainty Analysis (UA) and Sensitivity Analysis (SA) of real-time building energy demand model, which is derived from the dynamic relation of occupant behaviors and building space. UA and SA are indispensable sections of system development to insure the efficiency and accuracy of the model while there are three essential stage of UA and SA we followed. In terms of UA and SA, it is possible to structure a rational framework of complex dynamic network model, and discover the mapping between building energy demand and particular relation network patterns. We assume, firstly, a multi-mode dynamic relation networks model of occupant behavior, building space and temporal unit tends to be developed, and the definitions of basic model framework are given. Then, in the cases of the definitions in the basic model framework assumption, the propagation of uncertainty is taken into consideration according to the sampling based methods mapping the input parameters patterns onto the predictable results. Finally, we discuss the determination of sensitivity analysis with Morris method and Variance-based methods. In this paper, via UA and SA, our goal is to optimize the mapping procedure of the Dynamic Network Analysis (DNA) in building energy demand model, explore the essential input parameters pattern, and improve the precision of real-time model prediction.

Abstract: Nowadays, a great variety of construction project management modes are likely confusing. Firstly, according to contract mode and management mode, transaction mode involved in the process of construction project transaction is classified. Secondly, transaction mode is compared and analyzed on the scope of application, the characteristic of management, general effectiveness in owner’s view. The differentia of transaction mode is analyzed in many respects. This analysis is helpful for practitioners to understand and apply transaction mode of construction project.