In this study, an analytical studies were carried out for the buoyancy preflexion method to improve structural performance of concrete floating structures. The buoyancy preflexion means that the preflexion effects were induced to the floating structure due to the difference in buoyancy between the pontoon modules composing the floating structures. As the results of this study, it was found that the buoyancy preflexion significantly influence on structural performance of floating structures.

Complete closed-type carbon fiber reinforced polymer stirrups with a rectangular section (CFRPRS) were developed and tested in this research. The CFRPRS was intended to relieve stress concentration and to reduce the number of kinked fibers at the bent portion. A total of 16 B.5 specimens were tested regarding the bend strength of the CFRPRS and CFRP stirrups with circular section. Test results showed that CFRPRS improved the bend strength compared to its counterpart of conventional CFRP stirrups having a circular section, with the larger ratio of width to thickness being more effective for the same sectional area. The best correlation between the test results and predictions on CFRPRS bend strength was observed when the section of CFRPRS was modeled as a collection of transformed individual circular sections.

The object of this study is to evaluate static behavior of transverse connection of slab-type modular bridge. Especially, this paper focus on evaluation that shear key and tendon force affect bending strength of transverse connection of slab-type modules. We compared and examined the bending performance of connection through a structural test (4-point bending test). This experimental results show that bending strength of transverse connection of slab-type modules are influenced a number of shear key and amounts of tendon force. So in order to apply to modular construction, it is necessary to research in connection of slab-type modules.

In this study, reinforced concrete flat plates with steps were analyzed to suggest stiffness modification factors for the effective beam width of flat plates with steps. The analysis revealed that the stiffness modification is related to the length, thickness, height and location of the step.

In this paper, a moment resisting precast concrete beam-to-column connection is proposed for high seismic zones using bolt type connection. An experimental study was carried out to investigate the behavior of the proposed connection subjected to cyclic loading

To evaluate the resistance performance of RC building, progressive collapse analyses are conducted with the parameters of reinforcement patterns. Especially, these analyses use Reinforcement Contact function in Ansys Workbench to reduce the quantity of elements and analysis time. This method can be an effective technique to analyze large scale structures

In this study, we developed section list table for horizontally overlapped structural members of new traditional Korean-style houses. Wood grade, roof load, member length etc were considered as design variables. We expect that the developed section list table can help architectural designer of new traditional Korean-style house in their early design stage

The purpose of this study is to find out the relationship between overburden load and lateral stiffness of new traditional Korean-style house. The experiment was carried out with the 1/4 scale model under displacement control static loading. As the overburden load increased, the lateral stiffness of the new traditional Korean-style house also increased

In recent year, a reduction of the damage to nonstructural components such as piping, ceiling, mechanical and electrical equipments or an improvement on the performance of nonstructural components has emerged as a key area of research. Therefore, the primary objective of this study was to evaluate and understand the seismic performance of the complex piping system such as a T-joint connection. Furthermore, it was targeted on evaluating the Finite Element (FE) Model of the T-joint connection based on moment-rotation relationship of the experimental tests. The results of FE analysis by OpenSees were in a good agreement with the experimental test result till the failure point in both models.

In this study, experiments to evaluate concrete breakout capacity of anchor under dynamic shear loading were performed. The cast-in-place anchors without reinforcement were prepared for dynamic and static loading tests. Three specimens were tested for dynamic tests and one specimen for static test. It was found from the tests that the concrete breakout capacity of anchors without reinforcement under dynamic loading was about 6% higher than static loading.

This study is performed to analytic evaluate of precast infill wall with vertical slit. As a result, CON-SS specimen shows more ductile behavior than CON-N specimen. Analytical results are compared with experimental results.

The road luminaires are indispensable facilities for the safety of pedestrians and vehicles. However, foreign products have been used without any verification. In this study, the road luminaires for structural safety against wind load was evaluated through structural analysis. Results show that adequate safety is improved through strengthening inspection hole and use of circular arm.

The existing evaluation method of flexural strength of the hollow slab considering only compressive zone above the hollow part is conservatively evaluated. In this study, the practical compressive zone of the hollow slab are considered to evaluate its flexural performance according to neutral axis location

During the steam curing process, some initial prestress is lost due to the effect of high temperature. Limited number of quantitive evaluation has been reported on thermal loss of tendon during steam curing process. In this study, a theoretical evaluation was derived for the amount of prestress loss in prestressed concrete member during steam curing process. The equation devide overall process to 3 stages : from initial state to bonding state between concrete and tendon; just before cutting; and after cutting. The evaluation predicted the amount of prestress loss in the order of 7% of initial prestress force by direct thermal effect through all curing procedures. To validate the equation which estimate the amount of prestress loss, experimental studies should be performed.

The existing commercially available CFRP stirrups with circular section have inherent weakness of premature failure due to fiber kinks and stress concentration at bend. In order to overcome this weakness, a novel stirrup was developed with CFRP chord in the shape of spiral (CSCS). Results from B.5 tests have shown that CSCS were superior to CFRP stirrups with circular section in resisting stresses at bend.

This study presents a theoretical solution of elastic critical buckling load of infinitely long pipelines with non-uniform thickness under external pressure. The solution is derived with an assumption that a cylindrical shell under external pressure can be considered as a simple ring. The eigenfunctions are derived to obtain the critical buckling load for a ring structure with two thickness-reduced regeions. The finite element analysis is performed to verify the theoretical solutions.

Blades of wind farm structures should be designed to maximize the capacity generating lift force in the specific range of wind velocity. Although many studies related to wind farm efficiency have been performed but it is few to secure safety in the environment of high wind velocity. This study uses Computational Fluid Dynamics to analyze wind load on the blade and member force transferred to footing. And it is analyze wind load property variation related to the turbulence intensity because the wind property variation can be affected to generate the unstable motion on the blade, tower and footing. The maximum force loaded on the footing can be affected to the response of structure. The load variation by turbulence intensity can be considered when design the wind farm structures.

Recently, the manually adjustable solar structures are reguired for the angle variation of solar module to increase the electric power efficiency. Therefore, this study presents the adjustable connections in support structure and estimates the stiffness of the connections for the structural performance evaluation of the manually adjustable solar structure

To evaluate underground behavior characteristic according to the ground water level variation, displacement and bending moment using FEM(Plaxis) were analyzed. When the ground water level difference is more than 10m, it were analyzed that effects on underground structures was great

The AEMM uses the ageing factor to consider the effects of the increase of the modulus of elasticity of concrete with time on the deformation and stress distribution of reinforced concrete members. Previous researches proposed appropriate values of the ageing factor when the applied load is constant or the deformation is concstant. In this paper, the validity of ageing factor for the building structures were studied by the comparison with the results of step-by step method