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混凝土结构梁板钢筋的穿插排列问题 总被引:2,自引:1,他引:1
ARRANGEMENTANDALLOCATIONPROBLEMSOFSTEELBARSINREINFORCEDCONCRETEBEAMSANDSLABSCUIBing'an在现浇混凝土框架结构施工中,常遇到楼面梁的负筋交叉碰撞问题,使钢筋的保护层厚度... 相似文献
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SEVERALMETHODSOFCHIMNEYSHAFTCONCRETECONSTRUCTIONOFPOWERPLANTINWINTERSEASONLISheng陕西白水电厂二期150m/3.5m钢筋混凝土烟囱采取无井架倒模施工工艺,垂直运输设备为... 相似文献
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TECHNOLOGICALMEASURESOFSLIDINGFORMWORKFORCHIMNEYCONSTRUCTEDSTARTINGFROMZEROmANDUPTOTOPCHENTingsen陈廷森,中国建筑第二工程局四公司,高级工程师,06302... 相似文献
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混凝土胀模原因分析及防治措施毛林繁CAUSESANALYSISANDPREVENTIONMEASURESOFEXPANSIONOFCONCRETEFORMWORKMAOLinfan混凝土胀模现象,会造成构件尺寸增大、外形不规整,严重者需进行剔凿,影响... 相似文献
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CONSTRUCTIONMETHODOFENERGY-SAVINGRESIDENTIALHOUSESBUILTOFCOMPOSITEBRICK-CONCRETESTRUCTURESWITHCOMPOSITEHEAT-RETAININGSANDWICH... 相似文献
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ESCO的新思路及应用徐选才(中国建筑科学研究院空气调节研究所)早在20多年前,加拿大便着手节能技术的研究和应用工作。他们的经验教训值得我们借鉴和汲取。ES-CO就是一个例子。1概述ESCO是EnergyServicesCompany的缩写形式,意指... 相似文献
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欧洲规范4 钢-混凝土组合梁设计方法_(7)──梁中剪力连接设计胡夏闽(南京建筑工程学院210009)DESIGNMETHODOFEUROCODE4FORSTEEL-CONCRETECOMPOSITEBEAMS(7)──SHEARCONNECTION?.. 相似文献
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升降脚手架的型式与发展综述郭正兴ACOMPREHENSIVEINTRODUCTIONABOUTTYPESANDDEVELOPMENTSOFLIFTSCAFFOLDGUOZhengxing升降脚手架因其经济效益显著已得到了大量应用,但在大面积推广应用... 相似文献
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曲轴活塞压缩机基础的定心计算李静波(福建省石油化学工业设计院)CALCULATIONOFDETERMIENINGCENTREOFMASSINFOUNDATIONOFRECIPROCATINGCOMPRESSORWITHCRANKAXLE¥LiJing... 相似文献
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冷轧扭钢筋混凝土构件试验及受力性能分析 总被引:1,自引:0,他引:1
冷轧扭钢筋混凝土构件试验及受力性能分析王世慧张承起周彬EXPERIMENTSANDBEARINGCAPACITYANALYSESOFCOLD-ROLLEDANDTWISTEDBARREINFORCEDCONCRETEMEMBERSWANGShihui... 相似文献
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本文应用委托代理理论,面向既有建筑节能服务外包过程,对节能量保证型合同展开研究。建立了既有建筑业主与节能服务公司之间的利益博弈模型,并确定了最大化业主期望利润的契约参数。分析显示,在仅有道德风险情形下业主应当优先选择高能力节能服务公司,并对节能项目适当进行监督以减小不确定性。进一步地,在逆向选择与道德风险并存的情形下,高能力节能服务公司获得了信息租金,低能力节能服务公司提供的服务严格劣于帕累托最优服务,既有建筑业主可设计出一对合同实现分离均衡。理论分析结合算例得出结论:提高业主期望利润的关键在于采用具备信息甄别能力的契约、选取高能力节能服务公司、选取监督难度较小的项目,并投入适当的监督成本。 相似文献
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Jacket structures mounted on suction buckets carry potential as cost-efficient foundations for next-generation 10 MW+ offshore wind turbines located in transitional water depths. Given this foundation method, resistance to overturning moment relies mainly on the axial response of the buckets. In practice, suction bucket foundations can be modelled as “Beams on Non-Linear Winkler Foundation” where soil is idealised as non-linear springs. This paper describes the derivation process of static load-transfer or t–z curves for suction buckets installed in cohesionless soil. The mathematical formulation of the curves is based on regression analysis of data obtained from 100 axisymmetric numerical models in a medium characterised by the Hardening Soil model for representing the stress–strain relationships for Frederikshavn sand, which is a typical offshore sand. Various bucket dimensions, soil properties and drainage conditions were simulated considering tension and compression, in order to describe frictional behaviour at the skirt–soil interface. The non-linear springs' properties are therefore linked to foundation diameter, friction angle and vertical overburden pressure. By superimposing the effects of all springs, load–displacement curves are generated and compared with results from available experimental and numerical studies on suction buckets, revealing reasonable agreement. It is shown that the existing t–z formulations for piles are inapplicable to large-diameter suction buckets. 相似文献
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日本大阪府的建筑节能商业模式 总被引:1,自引:0,他引:1
介绍了ESCO事业的概念和适用范围,对节能效益分享型和节能量保证型两种不同的合同形式作了比较,对日本大阪府的ESCO事业情况作了总体回顾,并详细分析了其中的一个实例--府立劳动中心的节能改造.最后,文章对上海的建筑节能工作提出了相应的建议,指出上海的建筑节能必须走科技创新的道路,必须实行领跑者制度,必须加大政策支持力度,必须扎实做好基础性工作,等等. 相似文献
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通过5个不同材料及其大小的桶基在粉土中的负压沉贯实验测定桶基内不同深度处孔隙水压力的产生和发展,计算出桶基作用下粉土中渗流梯度的大小,揭示出负压沉贯过程中渗流梯度的变化过程,表明土体在沉贯前后性质的变化,为桶基的设计提供依据。 相似文献
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P R BUDARAPU Sudhir Sastry Y B R NATARAJAN 《Frontiers of Structural and Civil Engineering》2016,10(4):394-408
This paper is categorized into two parts. (1) A frame work to design the aircraft wing structure and (2) analysis of a morphing airfoil with auxetic structure. The developed design frame work in the first part is used to arrive at the sizes of the various components of an aircraft wing structure. The strength based design is adopted, where the design loads are extracted from the aerodynamic loads. The aerodynamic loads acting on a wing structure are converted to equivalent distributed loads, which are further converted point loads to arrive at the shear forces, bending and twisting moments along the wing span. Based on the estimated shear forces, bending and twisting moments, the strength based design is employed to estimate the sizes of various sections of a composite wing structure. A three dimensional numerical model of the composite wing structure has been developed and analyzed for the extreme load conditions. Glass fiber reinforced plastic material is used in the numerical analysis. The estimated natural frequencies are observed to be in the acceptable limits. Furthermore, the discussed design principles in the first part are extended to the design of a morphing airfoil with auxetic structure. The advantages of the morphing airfoil with auxetic structure are (i) larger displacement with limited straining of the components and (ii) unique deformation characteristics, which produce a theoretical in-plane Poisson’s ratio of–1. Aluminum Alloy AL6061-T651 is considered in the design of all the structural elements. The compliance characteristics of the airfoil are investigated through a numerical model. The numerical results are observed to be in close agreement with the experimental results in the literature. 相似文献
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建筑业引入合同能源管理新机制的探讨 总被引:3,自引:0,他引:3
讨论了合同能源管理机制的特点和作用,结合当前节能建筑和可持续发展的热点话题,探讨节能服务公司的推行前景,分析了合同能源管理机制的运作模式,阐述了将这种机制应用于建筑业可能存在的问题和困难,旨在为建筑企业提供合同能源管理这样一种建设节能建筑项目的新思路。 相似文献