Research and Implementations of Structural Monitoring for Bridges and Buildings in Japan

This paper provides a review on the development of structural monitoring in Japan, with an emphasis on the type, strategy, and utilization of monitoring systems. The review focuses on bridge and building structures using vibration-based techniques. Structural monitoring systems in Japan historically started with the objective of evaluating structural responses against extreme events. In the development of structural monitoring, monitoring systems and collected data were used to verify design assumptions, update speci cations, and facilitate the ef cacy of vibration control systems. Strategies and case studies on monitoring for the design veri cation of long-span bridges and tall buildings, the performance of seismic isolation systems in building and bridges, the veri cation of structural retro t, the veri cation of structural control systems (passive, semi-active, and active), structural assessment, and damage detec- tion are described. More recently, the application of monitoring systems has been extended to facilitate ef cient operation and effective maintenance through the rationalization of risk and asset management using monitoring data. This paper also summarizes the lessons learned and feedback obtained from case studies on the structural monitoring of bridges and buildings in Japan.

Building dynamic thermal simulation of low-order multi-dimensional heat transfer

Multi-dimensional heat transfers modeling is crucial for building simulations of insulated buildings,which are widely used and have multi-dimensional heat transfers characteristics.For this work,state-model-reduction techniques were used to develop a reduced low-order model of multi-dimensional heat transfers.With hot box experiment of hollow block wall,heat flow relative errors between experiment and low-order model predication were less than 8% and the largest errors were less than 3%.Also,frequency responses of five typical walls,each with different thermal masses or insulation modes,the low-order model and the complete model showed that the low-order model results agree very well in the lower excitation frequency band with deviations appearing only at high frequency.Furthermore,low-order model was used on intersection thermal bridge of a floor slab and exterior wall.Results show that errors between the two models are very small.This low-order model could be coupled with most existing simulation software for different thermal mass envelope analyses to make up for differences between the multi-dimensional and one-dimensional models,simultaneously simplifying simulation calculations.

The design and application of BIM+refined management and control platform for the Jingxiong railway bridge

The high-speed railway construction involves multiple professional fields,such as railway design,construction,and supervision.This paper architects the"BIM+"project refined management platform,designs the platform's logical architecture,physical architecture,and solves several key technology difficulties.This"BIM+"platform has been applied on the Jingxiong Bridge Project and achieved all-round,whole-process and multi-management of high-speed railway engineering construction.It significantly improves the level of construction management,and plays a role in promoting the development of high-speed railway construction informatization.

Investigation the Correlation between Thermal Bridging and Geometries in Concrete Buildings

This article focuses on the investigation of the correlation between thermal bridging and various geometric configurations. The article employs QuickField software for conducting three-dimensional steady-state heat transfer simulations to investigate the thermal behaviors of diverse geometric shapes. Significantly, this study involves the simulation of four distinct geometries including concrete circular, square, rectangular, and triangular column through an insulated concrete layer while all geometries maintain the consistent surface areas. The simulations yield findings indicating that circular thermal bridging has the best thermal performance, while rectangular thermal bridging displays comparatively the lowest thermal efficiency. Furthermore, the results indicate that alterations in the perimeter of thermal bridge interfaces, while maintaining a constant area, exert a more pronounced influence on the thermal performance of the geometries compared to proportional changes in area while preserving the perimeter. The study’s findings aid building designers and architects in creating more energy-efficient structural and architectural elements by incorporating thermally efficient geometries and forms. .

An Assessment of the Seismic Performance of the Historic Tigris Bridge

Turkey is a country that is vulnerable to earthquakes and has experienced many major earthquakes that completely destroyed or caused significant damage to numerous historic structures. Today, using computer software, it is important to numerically model and analyze historic structures that need significant restoration and strengthening, to evaluate them from a perspective of seismic resistance, and to reinforce them without altering their originality. In this study, a finite element model of the historic Tigris Bridge on the Tigris River was created. First, the stresses and deformation caused by its own weight were determined. Subsequently, dynamic analyses were performed in the time domain using past earthquake ground motion records. Displacement and stress values obtained for each earthquake record in these time domain analysis were compared to each other to evaluate the seismic behavior of the bridge comparatively. The seismic performance of the bridge was determined on the basis of the “Guidelines on the Management of Earthquake Risks for Historic Structures” published by the Directorate General of Religious Foundations in Turkey.

Thermal Bridges Impact on Energy Consumption in Residential Buildings Considering the Brazilian Bioclimatic Zoning

With the considerable increase in electric power consumption, searching for buildings with lower energy impact has become a crucial factor on controlling energy consumption, as well as designing buildings with high thermal comfort. Thermal bridges are weak points in buildings where the thermal resistance varies considerably between two distinct points. Depending on the situation, the existence of thermal bridges in a building can be favorable to the achievement of the expected thermal comfort and lower energy consumption. The aim of this paper is to analyze the impact of thermal bridges of reinforced concrete structure regarding to energy consumption for residential buildings in the Brazilian bioclimatic zones. The used method is characterized by computer simulations of distinct cases configured with and without thermal bridges. The results show that in most bioclimatic zones, the presence of thermal bridges in the wall composition contributes to the reduction of energy consumption for both heating and cooling, and independent of the wall＇s insulation level, solar absorptance is a major factor in the energy consumption levels, walls with smaller absorptance consume less and this consumption increases gradually with increasing absorptance.

Build the Bridge of People-to-People Exchanges and Cooperation between China and Central and Eastern European Countries:Sidelights on Visit of the Delegation of China NGO Network for International Exchanges to the Czech Republic,Hungary and Romania

September in golden autumn symbolizes harvest and hope.At the invitation of the New Silk Road Institute,Prague of the Czech Republic,Institute for Foreign Affairs and Trade of Hungary and Romania China Chamber of Commerce and Industry,Mme.

BUILDING UP AN OCEAN-CROSSING BRIDGE FOR SINO-US TRADE-To mark the 20th anniversary of Liulinhai's voyage to port Seattle, USA

It is April 18th again,an unforgettable date for us. 20 Vears ago, liulinhai from China Ocean Shipping Company(COSCO), the first cargo ship anchored at Seattle. It ushered in a new chapter and therefore bullt up an ocean-crossing bridge of Sino-US shipping business. Over the past 20 yearS,ships of COSCO. which shuttled between China and the United States, carrying friendship between the two countries and best wishes for peace and development, promoted greatly the Sino-US trade.

Investigation of earthquake mechanisms and their impact on certain basic concepts in earthquake engineering and seismology

In this paper, mantle circulation flow, continental drift, earthquake origin and other mechanical principles are examined as they apply to earthquake engineering, seismology and dynamics of fluid saturated porous medium. The relationship of mantle flow to earthquakes is examined and clarified, and a new model, different from Haskell’s, is proposed for the earthquake mechanism. The proposed new model is based on the discovery that two pairs of jump stress and jump velocity will start to act from the fault plane. Records obtained directly from recent earthquakes nearby and right on the fault break show a very large velocity impulse, which verify, indirectly, the new mechanism proposed by the author. Further, at least two physical parameters that characterize the seismic intensity must be specified, because according to the discontinuous (jump) wave theory, at the earthquake source, the stress jump and the velocity jump of particle motion should act simultaneously when a sudden break occurs. The third key parameter is shown to be the break (fracture) propagation speed together with the break plane area. This parameter influences the form of the unloading time function at the source. The maximum seismic stress in and displacement of a building are estimated for two unfavorable combinations of the building and its base ground in terms of their relative rigidity. Finally, it is shown that Biot’s theory of wave propagation in fluid saturated porous media is valid only when fluid flow cannot occur.

Building a Bridge Connecting the Hearts of People in Japan and China

At the time marking the 40th anniversary of the normalization of Japan-China diplomatic relationship the public show of Hiroshima Kagura was successfully staged in China. As the sponsor on the Japanese side, first of all, I would like to express

Doctors Bridging Borders Chinese doctors working in Africa build cultural bridges

BEFORE Chinese medical teams were sent to Africa, to most Africans. China was a remote country that they had barely heard of. But through seeing and being treated by Chinese doctors Africans began to learn about China and its people.

Build A Bridge for China-Malaysia Business Cooperation——Interview with Maycham-China Chairman Will Fung

Malaysia deems China as close trade partner and is the first batch of countries that embrace the Belt and Road Initiative proposed by China.Recently,Will Fung,Chairman of Maycham-China,received an interview with China’s Foreign Trade,when talking about China-Malaysia relationship in the past 45 years,he said that the bilateral relationship has been always developing with the solid foundation and sustainable partnership.Malaysia and China has long-term cooperation history and both sides established formal diplomatic relations in 1974.It is the first ASEAN country that established diplomatic ties with China.

Impact Analysis of Bridging on Remote Island Population

We analyzed the determinants of building bridges after comparing bridge islands and non-bridge islands.In addition,we examined the population change before and after the bridge building and the factors influencing the change.As a result,a remote island with high cost-effectiveness was selected and bridged.The early bridge was built in remote islands with fragile social infrastructure,and the outflow of population was suppressed owing to the improvement in standard of living by securing the medical care and education available in the bridge destination.However,around the year 2000,there are few remote islands where the changes in populations are influenced after a bridge was built.

One-of-a-Kind Footbridge, Lublin, Poland

The paper presents the construction of a steel footbridge in the People’s Park in Lublin.The initiation and development of the architectural design of an interesting and,as it eventually turned out,aesthetically pleasing footbridge is discussed.Two teams of architects and bridge engineers worked in parallel on the design.The design process of the footbridge structure is discussed along with its trial installation and on-site construction.The span of the footbridge is short,but its structure is innovative.For this reason its numerical model was developed used as a basis for an analysis of the dynamic response of the designed structure.The basic element of the acceptance procedure was constituted by a dynamic test load and an analysis of the pedestrian footbridge user comfort.Last but not least,the final section reviews the aesthetic canons of bridges and focuses on the footbridge in question in this context.A statistical measure of the aesthetic impression induced by a visit to the footbridge was applied resulting in a predictable and obvious final aesthetical assessment.

Talitha Gerlach: Building a Bridge of Friendship

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Building Bridges

For a year and a half, 19 year old Thierno Seydou Ka has been stud- ying at Chang＇an University in Xi＇an. northwest China＇s ShaanxiProvince. He and his 14 Senegatese peers came here as part of a joint training program between Chang＇an University and China Road and Bridge Corp. （CRBC）. Asengineering students.

Education Exchange Building Bridges

EDUCATION is the backbone of a country＇s development and described by Nelson Mandela as the most powerful weapon you can use to change the world. It was therefore no surprise that after Chinese President Xi Jinping visited South Africa in early 2013. the two developing countries issued a joint communique confirming they would continue to expand cooperation in basic and tertiary education.