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结合美国多本现行性能设计规范,叙述了性能设计的发展背景,阐述了进行性能设计的意义并与传统基于规范条文的设计方法进行了对比。对性能设计中涉及的性能目标、接受准则等主要问题作了细致阐述,介绍了性能设计发展的两个新方向:基于概率化表述的性能目标,和采用全新性能指标的下一代性能设计方法。 相似文献
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以广东某隧道工程为例,研究了水胶比、矿物掺合料和砂率对混凝土早期抗压强度、抗渗性能、抗氯离子渗透性能和抗溶蚀性能的影响.结果表明:随着水胶比的减小,混凝土早期抗压强度、抗渗性能、抗氯离子渗透性能和抗溶蚀性能均提高;掺入适量的矿物掺合料降低了混凝土的早期抗压强度和抗渗性能,但提高了混凝土的抗氯离子渗透性能和抗溶蚀性能;随... 相似文献
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阐述了热拌再生沥青混合料再生机理,对不同RAP掺量的沥青混合料的高温性能、水稳性能、疲劳性能以及低温性能等路用性能进行了试验,试验结果表明,掺加了适量RAP的沥青再生混合料能满足路用性能的要求。 相似文献
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对Cape封层进行了室内设计和相关性能试验,从Cape结构的防水性能、层间粘结性能以及高温抗车辙性能进行论述,并铺筑了相关试验路,得出了Cape封层结构具有优良的防水以及高温抗车辙性能,层间粘结性能的优劣更多的取决于外部环境以及施工技术水平的结论。 相似文献
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对振业城的概况进行了介绍,以适用性能、环境性能、经济性能、安全性能、耐久性能几个方面详细地介绍了AAA住宅小区深圳振业城的建筑设计,可供建筑设计人员参考借鉴。 相似文献
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对影响饰面混凝土耐久性的主要因素如饰面混凝土的抗渗性能、抗冻融性能、抗风化和污染性能及抗开裂性能等进行了分析和归纳,提出了有效改善饰面混凝土耐久性能的主要措施。 相似文献
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根据沉管后浇带混凝土的设计要求,开展了混凝土原材料检测和混凝土配制,测试了混凝土的工作性能、力学性能、耐久性能、体积稳定性等,引入混凝土膨胀剂性能的快速试验方法检测膨胀剂的膨胀性能,确保了膨胀混凝土的性能,保证了工程质量。 相似文献
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绩效衡量评测能为公园绿地布局优化、功能完善和服务提升提供直接依据。但由于影响公园绿地绩效的因素众多且作用方式各异,在界定、衡量和评价上均有一定复杂性。本文首先结合不同视角和标准,将公园绿地绩效分解为核心绩效与延展绩效、功能运行绩效与空间结构绩效、系统绩效与单体绩效等概念展开内涵及应用特征梳理;其次以处于核心地位的游憩服务绩效为主体对公园绿地功能运行绩效与空间结构绩效的评测方法展开辨析;最后根据各个绩效评测方法的利弊特点对不同方法的组合应用模式以及精度校验途径提出建议。 相似文献
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从研究建筑物抗火性能的重要性入手,对钢筋和混凝土两种材料的力学性能和热工性能进行了探讨,并对力学性能和热工性能的影响因素加以分析,以达到提高高温条件下钢筋混凝土性能的目的。 相似文献
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王东 《土木建筑与环境工程》2013,35(Z1):139-141
针对石油化工工程建设项目管理的特点和绩效评价的需求,分析了项目管理绩效评价研究的现状及石油化工工程建设项目管理绩效评价研究的现状,提出了石油化工工程建设项目管理绩效评价研究的方向:建立石油化工工程建设项目管理绩效评价指标体系和与之相适应的绩效评价方法;建立石油化工工程建设项目管理绩效评价的过程评价体系;开发针对石油化工建设工程项目管理绩效评价应用的工具软件。 相似文献
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通过对比试验,探讨了萘系减水剂和聚羧酸系高效减水剂配制的C60高性能混凝土性能。试验结果表明,聚羧酸系减水剂能够很好地满足C60高性能混凝土工作性和强度要求,而萘系减水剂很难达到C60高性能混凝土的要求,聚羧酸系高效减水剂用于C60及以上高强、高性能混凝土,是其应用发展的重要方向。 相似文献
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高性能混凝土的发展与应用 总被引:20,自引:0,他引:20
高性能混凝土是一种具有高强度、高耐久性与高工作性的混凝土,混凝土中的水泥石只有凝胶孔无毛细孔,具有高的抗渗性和耐久性。HPC组成材料中必须具有矿物质超细粉和高效减水剂。同时介绍了高性能混凝土在具体工程中的应用。 相似文献
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Ahmed M. Abdel Aziz 《Construction Management & Economics》2013,31(5):507-529
For project control during construction, evaluating the performance of contractors is usually established through progress measurement that compares the actual performance to the planned performance. Corrective actions and/or performance penalties are then established as relative measures that judge the actual performance based on current project plans without considering the performance of other similar projects or the lowest performance that projects could reach while still being successful. To establish a generalized benchmark measure and a non‐project‐specific project control tool, the concept of minimum performance bounds is explained in relation to their development for highway pavement projects. The bounds were developed using constrained‐parameters polynomial regression and cluster analysis for a sample of 497 highway pavement projects in Washington State. Minimum bounds for small, medium and large projects were fairly distinguishable signifying the project size effect on the location and shape of performance bounds. Bounds were also developed for projects classified by asphalt quantities, contract values, project duration and project length, being the common criteria used by highway agencies. Owners would use the minimum performance bounds as control tools when requesting corrective actions, establishing incentives, imposing performance penalties, initiating a default clause for substandard performance, and/or in pre‐qualifying contractors for new projects. 相似文献
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The success of modeling the sustainable performance of the residential building envelope will be to a great extent associated to the sustainable energy performance indicators used. The sustainable energy performance indicators that these building assessment models are developed around should be chosen by taking into account the targeted objectives. However, it is very common to find building performance assessment models that do not take into account these considerations and therefore have a limited capability and scope. This leads to inadequate aggregate indicators for the actual assessment of the sustainable performance of the building envelope for a sustainable energy efficient building. The focus of this paper is to investigate the principal sustainable energy performance indicators for modeling the sustainable performance of the residential building envelope and develop an approach for determining the most appropriate sustainable energy performance indicators. In doing that, this paper provides an overview of previous research on sustainable energy performance indicators and discusses conceptual framework for developing sustainable energy performance indicators. In order to identify these indicators that influence the capability of building performance assessment models, a comprehensive survey of construction industry professionals was conducted using questionnaire survey technique while the data was analyzed using correlation analysis techniques. 相似文献