In congested cities the number of railway lines has rapidly increased. The close vicinity of rail tracks to buildings often gives rise to conflict in respect of the transmission of noise and vibration to people or sensitive equipment. Vibration attenuation can be safely achieved by well designed vibration control systems applied preferably to the source but also to the receiver. In both cases, ...

For the aim of producing geometric models of critical infrastructures (e.g., governamental assets, nuclear plants, airports, railway and metro stations, hospitals, etc.) where various security tools and control systems may be easily integrated, we discuss here a fast and inexpensive construction of digital models of complex buildings and infrastructures from line drawings of architectural plans...

In response to an estimation of the likelihood of occurrence of the Tonankai and Nankai earthquakes, it is predicted that tsunami damage will occur in the JR Osaka Station area, the third biggest business center in Japan. The purpose of this study is to propose a system that evaluates the effectiveness of tsunami evacuation guidance and tsunami countermeasures, based on computer simulation of b...

Ropeless lifts are needed for vertical transport in the future super skyscrapers whose height is more than 800m because of the limited handling capacity of roped lifts for such buildings. The ropeless lifts have two advantages: multiple car operation in a single shaft and transferability between shafts. The ropeless lifts can be operated like double-track railway systems by making use of these ...

Material stocks are an important part of the social metabolism. Owing to long service lifetimes of stocks, they not only shape resource flows during construction, but also during use, maintenance, and at the end of their useful lifetime. This makes them an important topic for sustainable development. In this work, a model of stocks and flows for nonmetallic minerals in residential buildings, ro...

This paper presents methods for 3D modeling of railway environments from airborne laser scanning (ALS) and mobile laser scanning (MLS). Conventionally, aerial data such as ALS and aerial images were utilized for 3D model reconstruction. However, 3D model reconstruction only from aerial-view datasets can not meet the requirement of advanced visualization (e.g., walk-through visualization). In th...

A very large platform (2 stories RC frame) with plane size 1500m wide and 2000m long was built to cover the city railway communication hub area. About 50 isolation house buildings (9 stories RC frame) with 480,000 M were built on the top floor of platform. A new advanced isolation system named Storied-Isolation was used to ensure the seismic safety for this irregular structure with the largest ...

Construction projects become complicated and fragmented so that many specialty contractors are involved. In such changed environments, a general contractor’s overhead costs are increasing comparable to direct costs. In addition to an increase of volume, activities consisting of overhead costs play an important role in coordinating different participants who include different specialty contracto...

current practices in railway track analysis and design are reviewed and discussed in this paper. the mechanical behavior of railway track structure comprising of various components has not been fully understood due to the railway track structural complexity. although there have been some improvements in the accuracy of current track design methods in recent decades, there are still considerable...