Structural Performance Test of FRP-Concrete Composite Deck according to Existence of Shear Connecting Plates by Long Term Exposure was performed to study the Performance Evaluation. As the result, it was verified that this deck has sufficient serviceability and structural performance as a bridge deck.

In this study the progressive collapse behaviors of helical buildings were evaluated by nonlinear static and dynamic analysis. 36-story diagrid buildings with twist angles of 0, 90 and 180 degrees were designed as analysis model and progressive collapse analyses were carried out by removing first-story columns. The analysis results showed that helical buildings designed per current design codes generally had enough resistance to progressive collapse caused by the sudden loss of corner columns in the diagrid system.

To check the serviceability of K-UHPC structures, we need the guideline for the allowed crack width in various environment. To setup the guideline, direct tensile test of reinforced K-UHPC tensile members was implemented. The test results show very small crack width, and the allowed values for the ordinary concrete can be used for K-UHPC structures.

Experimental observations and theoretical predictions were presented for a total of 8 reinforced concrete wall with all sides being exposed to ISO standard heating curve. In the modeling of wall axial deformation under constant load at varying elevated temperature conditions, numerical models on heat transfer and spalling were considered along with the mechanical model. Based on the model, preditions on the fire resistance of the bearing wall under the axial load was presented.

The purpose of this study is to develop structral technologies on the lightweight composite slab systems with sound reduction layers in the modular house. In this study, two kinds of slabs with minimum thickness was suggested reducing the floor impact sound. In order to evaluate the structural performance, the flexural strenth tests were carried out on the one-way full scale specimens. From the results of test, we know that the proposed slabs had ductile behavior and would be safe sufficiently.

In this paper, we present the results of investigations pertaining to the structural behavior of egg-shaped pipe buried underground. Mechanical properties of pvc sample taken from the egg-shaped pipe are tested according to KS M 3006. Test results are used in the finite element simulation for the structural behavior of the egg-shaped pvc pipe buried underground. Maximum stress obtained at the pipe is compared with the maximum strength of pvc pipe material. It was found that the egg-shaped pvc pipe buried underground is safe.

A composite structural system which combines the advantages of reinforced concrete and steel structure is a structural system that has superior performance compared to the existing structural systems. In recent years, according to the increasing of attention for composite structures, the researches for the composite structures are more carried out. The composite beam used in this study is consisted of pre-cast concrete, cast-in-place concrete, T-type steel, and reinforcing bars. The steels are only used in each ends of the beam. In this study, the reasonable steels length at the ends of the beam is analyzed by structural performance analysis for changing in the length of the steel.

By thermal-structural coupled stress analysis, the equivalent stress and total deformation of girder under the influence of the temperature of the liquid within pipeline of pipe-rack structure is studied. Firstly, steady-state thermal analysis is carried out using a commercial software. Then, to perform a thermal-structural coupled stress solution, structural analysis is linked to the thermal model at the Solution level. The simulation results showed that the stress ratio that considers the pipe’s temperature for thermal-structural coupled stress analysis is higher than the stress ratio that consider only the pipe’s weight for structural analysis. The thermal stress caused by temperature convection is found to be influential on the pipe rack structure.

This study presents investigation study on the structural health monitoring system for the over-pass bridge connected to the passanger terminal of Inchoen International Airport. The bridge structure designed very conseratively was found to be structurally safe and well-operating based on the measured records over the last 10 years. However, the structural health monitoring system is recommended to be investigated again in a regular basis of every 2~3 years to ensure reliability of measurements.

In this paper, we suggest the new floating type photovoltaic energy generation system, which is improved the structural and economical efficiency, compared with the system developed in the previous research. The structural system in new floating type photovoltaic energy generation system reveals better in structural performance.

In this study, we conducted Life-Cycle Reliability Analysis Classified by Structure Movements in Removal PSC Beam Bridge. in short, we secured experimental values of bridge design factor and perform a detailed behavior analysis of structure system. finally, we could accomplish an Life-Cycle Reliability Analysis with considering of an environmental factor and variability of loading. We defined limit state function by statistical method (Response Surface Method, RSM) and calculated confidence indicator and Probability of Failure using reliability interpretation technique(FORM). eventually, we could compute Performance Profile and compare deterioration form according to time history by structure movements.

To contribute to efficient and safe inspection and maintenance of underwater facilities by identifying the damage status of underwater parts through collecting and analyzing local and overseas data. The carrying out actual underwater surveys to perform characteristics analysis and evaluation on the underwater facilities and present a Application Method of 3-D side scan sonar for Assessment of Underwater Structures.

This paper presents a subspace system identification algorithm for time-invariant structural system. System matrices are estimated from input-output data. The main computational tools are the LQ and the singular value decomposition in subspace system identification. The accuracy and stability of estimated system matrices are influenced by the parameters of Hankel matrix. For stable SI, the optimal parameters of Hankel matrix are determined by considering the computational cost and the accuracy of system matrix.

This study mainly focuses on presenting a rational procedure of assessing target reliability level of nuclear containment. The target reliability level can be obtained by considering LCC(Life Cycle Cost) of damage and operation. The LCC evaluation results in the different environmental situations. It is verified that this deviation of LCC can be adjusted by selecting the proper initial target reliability. In addition, slight increase of initial target reliability for the nuclear containment aiming a longer service life, therefore, the total expected loss during the extended service years can be maintained in the same level as the total loss expected in the 20-year service life for the existing containment structures.

Shear panel steel damper has been widely used as seismic energy absorption device because it is economical and effective. It dissipates seismic energy by plastic deformation and fatigue resistant around welded part. However, due to early deformation of the panel under cyclic loading, the resisting strength decreases, so that the resisting capacity of the panel needs to be increased. In this paper, to investigate the improved damper called advanced shear panel damper (ASPD), both plastic deformation and resisting capacity was carried out non-linear FEA. In addition, the analysis result was compared with static loading test for verification.

The purpose of this work is to study the adsorption and desorption characteristics of acetone vapor and toluene vapor from adsorption tower in the VOCs recovery device. The six kinds of activated carbon with different pore structures were used and the adsorption and desorption characteristics were compared according to pore structure, desorption temperature, and adsorption method, respectively. Adsorption capacity of acetone vapor and toluene vapor by batch method was higher than that by dynamic method. Especially, activated carbon with medium-sized or large pores had more difference in adsorption capacity according to adsorption methods as a result of gradually condensation of vapors on relatively mesopore and large pores. Activated carbons with relatively large pores and relatively small saturated adsorption capacity had excellent desorption ability.