High strength and ultra-high strength materials are widely used in industrial applications significantly increasing the load bearing capacity and reducing the overall weight and cost. The present study continues a ser...
详细信息
For the benefit evaluation of the seismic retrofit of a bridge, how to estimate the occurrence probabilities of various damage states is needed at first. Generally, for a bridge structure, the performance curve obtain...
详细信息
For the design of slender footbridges, the vibration serviceability under pedestrian excitation is often the governing criterion. In design stage, vibration levels are predicted using simplified load models that are e...
详细信息
For the design of slender footbridges, the vibration serviceability under pedestrian excitation is often the governing criterion. In design stage, vibration levels are predicted using simplified load models that are extrapolated from single-person force models to represent the effect of a crowd. However, these load models disregard Human-Human Interaction (HHI) and Human-Structure Interaction (HSI). This contribution investigates the effect of human-human interaction on the resulting structural response. A social force model is applied to simulate the realistic pedestrian traffic. The time-varying position and velocity of each pedestrian in the crowd are transferred into the necessary inputs for detailed step-by-step simulations of the pedestrian-induced forces and the resulting pedestrian-induced vibrations. The results show that accounting for HHI results into a reduced global walking speed. Also, the inter-person variability of the step frequencies is lower than when HHI is disregarded. As an alternative to the computationally expensive social force model, the effect of HHI is translated into an equivalent distribution of step frequencies of the pedestrians in the crowd. The results show that this simplified model allows for a very good approximation of the HHI effects on the resulting crowd-induced loading and structural response.
The paper discusses the use of acoustic emission, stress-memory effect, and X-ray computed microtomography (μST) to detect the onset of destruction of specimens of concrete and basalt which are widely used in constru...
详细信息
The extensive development has led to excessive growth of energy demand in *** shortages,lack of sustainable supply capacity of conventional energy and other issues have brought tremendous environmental and economic **...
详细信息
The extensive development has led to excessive growth of energy demand in *** shortages,lack of sustainable supply capacity of conventional energy and other issues have brought tremendous environmental and economic *** consumption of buildings is on the rise,and the proportion is 24.5% in 2013(Building energy research center of Tsinghua University 2016).Building energy consumption has become one of the three main energy consumption *** performance buildings are broadly implemented recently to relieve the environmental and economic *** paper presents the work of the thermal performance modeling and analysis for a residential building located in Guangzhou,Guangdong Province,*** building modeling is developed in Design Builder,a software developed for building performance analysis,and conforms to the "Design standard for energy effciency of residential buildings in hot summer and warm winter zone"(JGJ75-2012).The goal of this study is to predict energy consumption of the building for refrigeration,lighting and indoor ***,the study aims to identify sustainable measures to reduce energy consumption and operation cost for the new *** a result,it is found that in the hot summer and warm winter area as Guangzhou,the design and selection of exterior windows should be paid more attention to than exterior walls and *** performance windows can significantly reduce the energy consumption of the *** is not desirable to improve the thermal performance of the exterior wall and roof blindly,or it may increase the building energy consumption,resulting in higher construction costs and waste of building materials.
According to its website, the International Group for Lean construction is dedicated to the radical renewal of AEC practice, education and research. As is the way with academic researchers, that objective has been pur...
详细信息
According to its website, the International Group for Lean construction is dedicated to the radical renewal of AEC practice, education and research. As is the way with academic researchers, that objective has been pursued with little explicit coordination. Without expecting everyone to become part of a big machine, this paper presents the benefits expected from collaboration on a high level research program aimed at removing the obstacles to radical renewal. Obstacles to that transformation are proposed, culminating in an appeal for collabration to remove those obstacles.
This paper is an appeal to the various stakeholders committed to lean transformation of global construction to coordinate their efforts, and to recruit others not yet committed. Both opponents and advocates of industr...
详细信息
This paper is an appeal to the various stakeholders committed to lean transformation of global construction to coordinate their efforts, and to recruit others not yet committed. Both opponents and advocates of industry transformation are identified;those who live off the waste are in one corner and those who suffer from unsafe, defective, late and costly construction are in the other. A case is made for an alliance of advocates to develop and coordinate the manifold initiatives that together constitute a strategy for transformation.
The article deals with issues related to light clay and straw bale in modern housing. It presents the characteristics of clay and straw, as building materials. Attention is paid to the possibility of using these raw m...
The article deals with issues related to light clay and straw bale in modern housing. It presents the characteristics of clay and straw, as building materials. Attention is paid to the possibility of using these raw materials for building walls in single-family houses. In addition, the paper presents a thermal analysis for this type of walls and the resulting conclusions, which allow for the treatment of straw bale and light clay as a viable alternative to commonly used technologies for erecting buildings. According to the PN-EN ISO 6946: 2008 standard, thermal resistance and heat transfer coefficient were calculated for selected vertical partitions. Other natural building technologies have been omitted.
The bearing capacity of components under the influence of corrosion was studied to predict the service life of corroded H-beams. Firstly, based on the experimental data of mechanical properties of corroded steel, the ...
The bearing capacity of components under the influence of corrosion was studied to predict the service life of corroded H-beams. Firstly, based on the experimental data of mechanical properties of corroded steel, the Weibull model was used to fit the test data to obtain corrosion H-beam strength prognosis curve. Then, combined with the target design strength value, the prognosis analysis of the corroded H-beam was carried out. Finally, a numerical example was given to verify the effectiveness of the proposed method. The Weibull model could well fit and predict the bearing capacity of corroded H-beams. According to the bearing capacity attenuation model of H-beams, the service life of the H-beams in our research was well predicted, about 66.5 years. In conclusion, the proposed method can well predict the life of corroded H-beams and it has been verified feasibility and effectively.
暂无评论