地铁轨道密封装置非线性有限元数值模拟

新型地铁轨道密闭装置应用于地铁区间防护密闭隔断门,能把地下铁道空间隔断,构成人防工程,具有明显的人防效益和经济效益。在不影响平时通车的前提下,通过采用内置仿形橡胶的轨道密封装置,快速实现不同受力状态的转换,可解决地铁轨道密封的问题。采用ANSYS软件对地铁轨道密封装置进行了非线性接触分析,研究了密封装置的变形、应力和接触状态,结果表明,该种密封装置具有良好的密封性能,为地铁人防工程建设提供了可靠的技术支持和保障。     

房价增长时期商品房需求模型构建

为了研究商品房房价增长时期,需求各影响因素与需求量间的数量关系.利用计量经济学方法和软件,分析了各变量和需求函数间的数量关系,以及各因素的重要关系,获得了房价增长时期商品房需求函数模型.并利用经济性、误差、拟合优度和显著性等检验方法对其进行了验证,其结果符合经济规律和各种检验.     

住建部信息安全保障建设探析

本文从住房和城乡建设部信息系统存在的安全问题出发,介绍和分析了信息系统改造的情况及安全保障建设情况,     

同一楼内住户位置差异对耗热量及热费的影响

以天津市某住宅小区22栋楼1个采暖季各住户的耗热量与包头市某住宅小区8栋楼3个采暖季各住户的耗热量共46组数据为研究对象,通过对同一楼内不同位置住户的耗热量与热费差异的分析,说明了在实行两部制热价计费方式后由住户耗热量差异引起的热费差异是不明显的.     

GIS小城镇灾害数字仿真与公共安全应急系统

针对小城镇防灾减灾的突出问题和公共安全的巨大需求,在综述灾害防治手段及相关研究进展的基础上,综合运用灾害科学和信息技术,研究开发了小城镇灾害数字仿真与公共安全应急决策系统,解决了系统实现过程中的一系列关键技术:基础设施与抗灾设施的可视化管理、灾害数字仿真重构理论与方法、公共安全应急决策、公共安全空间数据库的建库技术及三维可视化等.该系统能够在灾害数字仿真重构的基础上,实现公共安全应急决策支持,增强小城镇的灾害应急反应能力.     

Building energy efficiency in rural China

Rural buildings in China now account for more than half of China's total building energy use. Forty percent of the floorspace in China is in rural villages and towns. Most of these buildings are very energy inefficient, and may struggle to provide for basic needs. They are cold in the winter, and often experience indoor air pollution from fuel use. The Chinese government plans to adopt a voluntary building energy code, or design standard, for rural homes. The goal is to build on China's success with codes in urban areas to improve efficiency and comfort in rural homes. The Chinese government recognizes rural buildings represent a major opportunity for improving national building energy efficiency. The challenges of rural China are also greater than those of urban areas in many ways because of the limited local capacity and low income levels. The Chinese government wants to expand on new programs to subsidize energy efficiency improvements in rural homes to build capacity for larger-scale improvement. This article summarizes the trends and status of rural building energy use in China. It then provides an overview of the new rural building design standard, and describes options and issues to move forward with implementation.     

钢桁架-混凝土组合设备基础

结合工程实践 ,为增加精密机床的基础刚度 ,采用钢桁架 -混凝土组合结构。分析计算和试验结果表明 ,根据弹性理论得到的这种新型组合结构的计算结果能够满足工程应用的要求。     

Target-oriented obstacle analysis by PESTEL modeling of energy efficiency retrofit for existing residential buildings in China's northern heating region

According to the “Comprehensive Work Program of Energy Efficiency and Emission Reduction” of the Chinese government, during the period of the “11th Five-Year Plan”, 1.5×10⁸ m² of existing residential buildings in China's northern heating region are to be retrofitted for energy efficiency. However, at present, this “Energy Efficiency Retrofit for Existing Residential Buildings” (EERFERB) faces many obstacles. Under the current working and market system, both the central and local governments and the energy supply companies can not push on this work smoothly. Using both the results of the annual national special inspection of building energy efficiency and some case analyses, this paper examines the necessity for energy efficiency retrofit, along with the relationships among the various Political, Economic, Social, Technological, Environmental and Legal (PESTEL) factors affecting it. Furthermore, organizational, financial and technical support systems are explored to promote the development of retrofit. Finally, some primary principles to be followed toward the implementation of EERFERB are suggested.     

《城市轨道交通地下工程建设风险管理规范》GB50652—2011编制介绍

《城市轨道交通地下工程建设风险管理规范》GB50652—2011作为我国首部工程风险管理规范,其颁布实施标志着我国城市轨道交通地下工程建设风险管理步入一个崭新的阶段。系统介绍了本规范的编制背景、指导思想、编制过程,并对规范的主要内容、实施要点和问题性进行详细的介绍、解读、分析与讨论。同时,结合国外相关标准现状介绍,说明国际上土木工程风险管理标准编制现状及进展情况。