Applied Mechanics and Materials Vols. 744-746

Abstract: Using the static displacement data, this paper presented a damage localization method for a continuous beam. This method is based on the estimation of changes in the static displacements of the structure. The most significant advantage of the method is that it does not require development of an analytical model of the structure being tested. All predictions are made directly from the measurments taken on the structure. The efficiency of the proposed method is demonstrated using simulated data of a three-span continuous beam. The results showed that the region in which the displacement variation is maximum is the damaged region for the continuous beam. Regardless of damages being small or large, the proposed method can identify locations of structural damages accurately only using the displacement changes under the applied static load. The proposed procedure is economical for computation and simple to implement. The presented scheme may be useful for damage localization of the continuous beam.

Abstract: The stress distributions of the related anchorage zones are complicated under the large tonnage anchorage device. The safety and the crack resistance of the anchorage zone which exists due to the usage of are the critical part of the structural design. Do research on the general distribution regularity of stress of anchor-region by using ANSYS and gives the reason of the cracks occurred on web-plate.

Abstract: As a new form of floor, the cast-in-place reinforced concrete hollow floor has the advantages on functions, structural and economic performances.It is a great technological innovation in the field of building structure in our country. This paper studies the torsional problems of the hollow floor boundary beam, and derives the torque’s calculation formula of boundary beam. Then the paper compares the results with the numerical simulation. The results show that both the error is small, the theoretical derivation formula has certain feasibility.

Abstract: The calculation method of punching shear bearing capacity of unbounded prestressed concrete slab is presented for the reason that traditional methods mainly depend on experiences. The concrete material is assumed as ideal rigid-plastic material. The Quasi-Coulomb Criterion is taken as the strength criterion of concrete, according to plastic limit theory, and the calculation equation of punching shear limit bearing capacity of unbounded prestressed concrete slab is derived through the establishment of virtual work equation. Comparison of the calculation results based on the presented equation with test results proves that the calculation method in this paper can not only reflect and decide various influencing factors of punching shear ultimate bearing capacity of unbonded prestressed slab, and but also the calculated results are more reasonable, accurate.

Abstract: In civil engineering we solve problems with interaction between the foundation base and the subsoil often. For the determination of stress in foundation structure is needed to determine the influence of the stiffness respectively pliability of subsoil to structural internal forces, and vice versa, how the stiffness of the foundation structure affects the resulting subsidence. In this article I would like to compare subsidence and deformation of several different baseboards.

Abstract: Based on the maintenance requirement of seaport wharf, the glass tubes filled with TY-6638 polyester adhesive or cyanogen gel adhesive were embedded in the self-repairing concrete to make the simply supported beams. Through the third-point bending experiment, the repairing capability and its influencing factors of two kinds of adhesive beams were analyzed from loading capacity and flexibility. The results show the loading capacity of cyanogen gel adhesive beams and polyester adhesive beams can be restored averagely to more than 90.0% after repair,so self-repairing concrete for maintenance of seaport wharf is technically feasible, it deserves to be studied farther.

Abstract: Technology of CO₂ Geologic Storage (CGS) especially its possible developments is helpful for improvements in reducing greenhouse gases and alleviating the greenhouse effect, which are necessary at global scale due to rising demand for fossil energy. The theory of deformation due to liquid injection was learned. A test on laboratory scale which injects water into compacted sand covered by low permeability clay showed the land uplift phenomenon. Some further discussions of the land uplift with different injection quantity was studied.

Abstract: The sedimentation deformation of superhigh fill in the mountainous areas is very complicated in law, and will be influenced the topographic relief, and it is specially outstanding for the sedimentation of high-fill project. For the significant project such as airport and road base, in order to guarantee the safe operation of the project during use, it is required to strictly control the post-construction and uneven sedimentation. Therefore, the stability of superhigh fill has become the key to influence the safety and stable operation of projects. In this paper, a simulated calculation is conducted to the ultrahigh fill of expansion project of an airport in Chongqing to analyze its stability, so as to provide references for the project design and construction.

Abstract: In high mountain and deep river valley areas, geological materials of river valley evolution are often missing or incomplete. To address this problem, tectonic movements at project site are analyzed using mathematical statistics based on the analysis of formation and evolution history of river terraces, and then a new method to determine the thickness of river incision layers is proposed. Taking Jiata dam area at the Western Route of South-to-North Water Transfer Project in China for an example, the reliability and reasonability of the proposed method are validated through a case study.

Abstract: In order to deal with the collapse of soil in pile bore holes due to construction wastes, this essay discusses four possible solutions. By comparing the advantages and disadvantages of these solutions, the method of Manual boring + Machinery boring is finally chosen. This provides a reference to other similar construction projects.