The goal of the study is to investigate vibration reduction effects in the ground due to the train-induced vibration using wave barriers. Rubber-based material has been selected for wave barriers and various barrier depths have been considered during numerical analysis. Result shows that the reduction effects are increased with proportional to the barrier depth, as one expected. Finally, results can be applied to design wave barriers for reducing transferred train-induced vibration to near structures.

In this study, sensitivity analysis to investigate the effect on analytical results of the aircraft impact analysis parameter for the nuclear power plant was carried out. Verification of the analytical model and method using the test results was performed. The eroding parameter of the Winfrith concrete material model in LS-Dyna and modelling method of the SC wall structure were studied. Finally, these results are to be used for the development of the structural safety evaluation procedure for the aircraft impact on the nuclear power plant.

The floating PV generation system is consisted of unit structures linked by the hinge type connection because the effect of bending moment in the structural system loaded due to the unstable movement of water surface can be minimized. In this paper, the investigation and development process of floating PV generation unit structure is presented.

Recently, the rotational solar tracker system is presented for the high electric efficiency. The horizontal rotation tracker is the structure for rotationg horizontally the most important part. However, it is difficult to secure the safety and maintenance in solar tracker systems. Therefore, this study suggests the reasonable structure type for horizontal rotational solar tracker through the strength reinforcement of the structure to ensure stability.

Based on the study of chloride migration coefficient and hydration heat evolution, it was found that the use of ternary blended cement was effective to achieve desired service life and minimum crack index. On the other hand, a high level of compressive strength is required for marine concrete mix design.

Traditional ancient tomb is blocked from outside air by the original role of the structure. However, recently at the structure has been excavated and robbed, it is in a state of being opened. It is not easy to prevent durability reduction of structure member according to the opened state. To this end, This study perforns the behavior characteristics evaluation according to durability reduction of traditional ancient tomb.

In this study, rational prediction models for the effective compressive strengths of HSC corner and interior columns with intervening NSC slabs are developed. A structural analogy between HSC column-NSC slab joint and brick masonry is used to develop the prediction models. In addition, the aspect ratio of slab thickness to column dimension and the surrounding slab confinement effect are considered in the models. The proposed prediction model is verified by comparison with experimental results and various prediction expressions. As a result, with average test-to-predicted ratios of 1.00 for HSC corner columns and 1.09 for interior columns, the proposed equation provides superior predictions over all of the existing effective strength prediction approaches including KCI structural concrete design code(2012).

In this paper, we present requirements for the spudcan footing of jack-up barges, we take a survey about jack-up barges and their limitation. And by using the result of the survey, we find the failure modes and requirements for design of the footing.

In the attempt to predict life time in a concrete, some modified pore structure in concrete was taken accounted to a diffusion modelling. As a result, total length coming from MIP and LTM methods was somewhat inconsistent with corresponding value from profiling. The reason was assumed that overestimated surface chloride content and penetration length with unaccurate determination of continuous pores.

Construction of long span bridges is rapidly increasing, the criteria of impact load and study of stability for suspension bridge cables by rear-end collisions and crash of the vehicle, not at the moment is the actual situation. In this study, the main cable of suspension bridges was applied appropriate impact loads and analyzed the structural stability of the cable.

This paper describes the structure performance of glass fiber-reinforced polymer (GFRP) shear connectors for insulated concrete sandwich panels (CSP). In this study, experiments are conducted to investigate the physical features of insulated CSP with GFRP shear connectors with varying shape and specification of GFRP shear connectors, and types of insulations. Test results indicate that developed GFRP shear connector has a significant effect on structure performance of insulated CSP.

This paper describes the evaluate adhesion area effects on structural performance of structural sealants. In this experimental, glass panel thickness and initial construction depth of sealant are 12 and 5mm. Principle variable is addition of sealants : 5, 10, 15mm. Prior to add sealant, adhesion part carried out cover with primer. Test method is based on the bending test. Loading method is to put sand on the center of the glass panel in order to the wind load applied to the actual condition. Test results indicated that addition of sealants is not improve the peak load.

Based on the study of pore structure of cement-free mortar, it was found that cement-free mortar mixed with Ca(OH)2 type alkali-activator had the lowest transmissivity on the mercury intrusion porosimetery and had the lowest chloride penetration rate on the rapid chloride penetration test.

Besides its exceptional resistance to corrosion, Fiber Reinforced Polymers (FRP) present the advantage to develop high strength compared to its self-weight which highlighted it recently as a material that can replace fairly classical construction materials like steel and concrete. The emergence of glass fiber and the development of resin fabrication technology made it possible to reduce significantly the costs of FRP material and the emphasis given on the importance of life cycle cost (LCC) for structures after the 1980s opened its exploitation in the construction domain. In this paper, research trends of structural member development which is related to FRP material are briefly suggested.

This study is performed structural analysis by boundary condition of pile head. At result, proposed reinforcement length and calculation formula in Super Pretensioned and Reinforced Spun High Strength Concrete Pile

According to NEI 07-13 R8, in aircraft impact analysis for new plant design, global structural damage of the target structure can be evaluated analytically using one of the following methods of evaluation: 1) Force time-history analysis method. 2) Missile-target interaction analysis method. It depends on the availability of data on the dynamic characteristics and the intended level of detail of analysis. The purpose of this study is to evaluate the effect on the analytical results of the aircraft impact analysis method. Several impact analyses using various method were performed for the simplified external SC wall of the APR+ nuclear power plant structure.

With the recent decreasing of available land, the usage of underground for constructing underground parking lots, subway, underground shopping centers and roads is becoming more frequent than before. Subsequently, due to the changes of the ecosystems and the depletion of ground water in the underground environments are being negatively affected due to coming into contact with corrosive and hazardous substances. In particular, the durability, safety and convenience of the people who reside or utilize these underground structures are reduced by the environmental problems originating from underground ecosystems. Currently there exist a large number of on-going topics of discussion intended to solve the problems, but in order to consolidate a proper and standardized procedure of maintaining waterproofing techniques for these underground structures, a testing method to evaluate the performance of waterproofing and waterleakage resistance in underground structures is necessary.

In this study, strain distribution of the beam end and the end of horizontal stiffener of high-strength steel beam-to-column connections was analyzed by finite element methods. According to the FEM results, applied stiffener method showed that it is available to relieve the strain of maximum stress point of beam member

The purpose of this study is to evaluate the collapse probability of structural member in building. Probability of material strength and live load were collected. By evaluating the probability distribution for design strength and required strength, the probability on the collapse of a column were evaluated.

The remaining service life (RSL) of the concrete structures built in the past has become a social issue with the concerns of the sustainable construction. In the previous studies, some simple methods for estimation of the RSL of the concrete structures were proposed. However, most of the existing studies on the RSL evaluation method have focussed on the investigation of the single deteriorating factor. In this study, the combination effect of various factors related with durability performances of the concrete structure, such as concrete carbonation and chloride penetration were considered by utilizing the fuzzy and reliability theory.