In order to realize a system that reduces multi-modes of floor vibration and accompanying structure-borne sound by a single sensor and an actuator per unit span area, a method of active vibration control and a procedure to identify the control object are described. Then the good performance of the method and procedure is demonstrated with numerical simulations. Their usefulness has also been shown through experiments with a life-size floor structure. It is verified that the first three modes of vibration and structure-borne sound are reduced as designed by about 10dB at the first mode and some 5dB at the second and third modes. The method and procedure will lead to the active control system with automatic control design function for floor vibration and structure-borne sound.

抄録全体を表示

In the former study by the authors the boundary position (angle) of light and shade areas perceived on the cylinder surface was consistent with that showing the largest ratio of luminance (or illuminace) at successive two points on the cylinder surface. The apparent proportion of light and shade areas of the face was geometrically obtained by the boundary position (angle) of the light and shade areas when the face was simulated as a half cylinder and satisfactorily explained the perceived modeling. In the present study the data obtained in the previous experiments on the modelling evaluation was synthetically analyzed. As a result a multiple regression model for modelling of human face at a window was constructed with two variables of the semi-cylindrical illuminance ratio and the apparent proportion of light and shade areas.

抄録全体を表示

We have recognized that the evaluation of deformation on wooden material in building envelopes is important for a durable design of building envelopes. There ware slight evaluations of deformation on wooden material caused by annual hygrothermal behavior. It is a practical interest that expansion/shrinkage on wooden materials are caused in low moisture content region. In this paper, we analyze deformation on wooden stud in well insulated and air tight building envelope that is caused by annual moisture content variation. We have used wooden materials equilibrated 12-15% weight moisture content (90% relative humidity related with a warm temperature). The wooden stud can be expanded 1% of initial state, during summer. We show additionally that a wooden stud equilibrated 60% relative humidity can be expanded to exceed initial state, during summer. In winter, the wooden stud shrinks utmost 2% in proportion to the decrease of moisture content.

抄録全体を表示

The purpose of this study is to clarify the effect of building and system factors on the thermal performance of the solar floor heating system with Water Floor (water heat-storage floor) by simulation analysis. The examined building and system factors are the heat capacity of Water Floor, the material of heat-storage floor, the thickness of thermal insulation of building envelope, climate etc. From the results, it was found that Water Floor can raise generally 20% of comfortable time rate and is effective to raise thermal environment level, comparing to the concrete floor and plywood floor, and so on.

抄録全体を表示

Flocculated micro-capsule pellet phase change material (FMC-PCM) which has high latent heat amount is used to the floor supply air conditioning system with thermal energy storage for building structure during night. The load shifting effect can be determined by temperature conditions in the nighttime and daytime. The effect of radiation from the floor face allows the set temperature to be increased to 28℃ by using a FMC-PCM which shows phase change around 20 to 23℃. Thermal sensation indexes indicate the comfortable sensation under a condition with it. The use of the FMC-PCM also effects the improvement of the uncomfortable coldness in the morning in usual systems.

抄録全体を表示

The purpose of this study is to clarify characteristics air temperature distribution on platforms, and also to analyze influence of existence of trains on platforms of railway station on air temperature distribution. In this paper, we measured the thermal environment on platforms in station 'A' that is one of the largest railway stations in Japan. Existence of trains had an effect on air temperature rise of Shinkansen platform. Air temperature distributions on platform of the old railroad platform and the Shinkansen platform were different, but air temperature of Southernmost point of each platform rose every 20〜30minutes, 3〜5minutes after the blow of strong wind. Therefore, we proposed a method of time correction by the moving observation of air temperature and we got two patterns of air temperature distribution on platforms for every hour. It was clarified that when about 3m/s wind blew along the orbit on platforms in the open type platforms, the high-temperature area spread about 60m, and central point of each platform was cooled down.

抄録全体を表示

In this study, we analyzed about relationship between sea-land breeze and air temperature in the Hiroshima wide area in a summer season. The summary of the results is shown below. 1) At the time of sea breeze during daytime, sea breeze decreases air temperature rise in the shore, but in the suburbs, sea breeze increases air temperature rise by the movement of the heat generated in the urban region. 2) At the time of the land breeze of night, land breeze reduces air temperature in the Ohta-riverside point, and the reduction effect of temperature was shown also near the mouth of the Ohta-river by development of land breeze.

抄録全体を表示

The purpose of this study is to clarify the characteristics of the inhabitant's preference for regional landscape in Higashi-Hiroshima City. First of all, the inhabitants are required to take photos they prefer and dis-prefer from the fieldwork. Furthermore, the inhabitants are required to state their views on the taken photos in free-descriptive answer style. The views are divided into 2 categories, such as 'object' and 'reason', on the analysis. Then, the 2 categories are analyzed by quantification method of the third type. The results are that when the object is simplex, the landscape is recognized as 'dis-preferable'. When the object is complex, the landscape is recognized as 'preferable'. Secondly, the pictured landscapes are classified by the area ratio of the landscape elements and the composition of the landscape. As the results, 7 classifications of 'preferable' and 6 classifications of 'dis-preferable' are obtained. In addition, by the analysis of the landscape classification and 'reason', different tendencies in each classification, based on the existence of the various points of view to decide whether 'preferable' or 'dis-preferable' , are found.

抄録全体を表示

For holistic evaluation on architectural planning and large-scale development projects, it is important to examine the methodology of weight determination of factors, such as the construction cost, quality of design, and energy consumption. Therefore the authors performed the four types of questionnaire surveys. In these surveys, four methods are adopted for investigation, they are ranking method, grading method, analytical hierarchy principle (AHP), and conjoint analysis. In the conjoint analysis, the weights were deduced from the parameter 'β' based on the assumption that the levels with unit of all factors are in proportion to qualitative scores. From the analysis of the questionnaire surveys, following results are reached. 1) Although the ranks of weight of all four methods are similar, the differences of weights among the factors differ according to the weight determination method. 2) The weight difference based on the conjoint analysis is the most remarkable of four methods. That based on the AHP is secondary large. 3) The weight based on the ranking method of each answerers do not agree with that based on the AHP method.

抄録全体を表示

High wireless communication systems demands in a variety of office, public and residential environments requires the electromagnetic properties of building materials to predict the indoor wave propagation. This paper describes the equivalent electrical properties of typical building walls composed of several building materials. We estimate the complex specific dielectric constant of building materials composition from the spatial transmission loss measurements and discuss the dispersion of the measured transmission loss. The validity of the estimated equivalent dielectric constant is discussed by a comparison of the reflection loss between the measurement and the prediction. This spatial reflection loss measurement can be one of the effective methods to determine the equivalent electromagnetic properties of composite building walls.

抄録全体を表示

In this research, the effect of transpiration and evaporation on outdoor thermal environment in an area around a residential complex with and without trees were measured in summer, and the following results were clarified. 1) After rainfall, the average outdoor air temperature per day is 0.4K lower in the trees area than that in the no trees area. 2) The average moisture per day is 2.2g/kg' higher in the trees area than that in the no trees area. 3) The evaporation in the shade area is 1/3 to 1/2 times that in the sunny area. 4) The transpiration rate of the south shoots is 2-4 times as much as that of the north shoots. The results show that trees are effective in moderating outdoor air temperature after rainfall.

抄録全体を表示

Ultraviolet radiation makes erythema that injures DNA of the human skin. The Environment Agency of Japan publishes a health guidance manual for ultraviolet radiation in June, 2003, and it is suggested to protect skin from the excessive ultraviolet radiation. Therefore, the ultraviolet radiation must measure to estimate the amount of exposure. The amount of skin exposure is calculated precisely by measuring the distribution of sky ultraviolet radiation spectrum. The distribution measurement of the ground ultraviolet reflection from the beach sand was carried.

抄録全体を表示

Authors proposed a reuse management model of building steel structures using information technology. This paper discusses conditions to establish a database modeling for reusable members, which are clarification of role information, performance evaluation of reusable members, unified control of building information as data records. Business management decides management information, inspection information and performance information of reusable members, and controls them using the database. Authors develop a model of the database in simulations of building steel structures on basis of these conditions.

抄録全体を表示