共查询到20条相似文献,搜索用时 171 毫秒
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为进一步研究GFRP管-混凝土-钢管受弯构件的受力性能,对其在单调荷载作用下的整个受力过程进行分析.采用平截面假定的纤维模型法,编制了GFRP管-混凝土-钢管组合构件的抗弯承载力计算程序.利用该程序计算得到弯矩-曲率、荷载 变形关系曲线,以及混凝土强度、空心率及GFRP管及内钢管厚度等因素对GFRP管-混凝土-钢管组合构件荷载-变形曲线的影响.研究表明,荷载-变形曲线可分为弹性、弹塑性和塑性三个阶段,空心率对极限荷载的影响比较显著,GFRP管-混凝土-钢管受弯构件的承载力随着GFRP管和钢管管壁厚度的增加而增加,随着混凝土强度等级的提高而增大,随着空心率的增大,其相应变小. 相似文献
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采用纤维模型法编制非线性分析程序,绘制出弯矩-曲率全过程曲线,并与有关文献试验数据进行比较,吻合较好。在此基础上,对混凝土强度、钢骨形式、配骨率、套箍率等因素对抗弯构件力学性能的影响进行分析比较。最后通过对数值计算结果的回归分析,得出实用的抗弯承载力计算公式。 相似文献
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《钢结构》2017,(8):42-47
为研究钢骨-钢管高强混凝土新型组合柱的抗弯力学性能,采用ABAQUS软件对钢骨-圆钢管高强混凝土组合柱纯弯力学性能进行有限元分析,得到了典型组合柱纯弯试件的荷载-挠度关系曲线,不同受力阶段的应力分布规律以及破坏模态,同时考虑不同参数对组合柱抗弯力学性能的影响,探讨了钢骨-圆钢管高强混凝土组合柱抗弯承载力实用计算方法,提出简化计算式,并将简化式计算结果与有限元及试验结果进行对比。最后用MATLAB编写了组合柱纯弯纤维模型法计算源程序,并将程序计算的弯矩-跨中挠度曲线与试验结果及有限元结果进行比较。结果表明:简化式计算结果与试验及有限元计算结果吻合良好,数值模型能较好地反映组合柱纯弯受力的弯矩-挠度曲线。 相似文献
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《建筑结构学报》2019,(Z1)
通过4个高强方钢管高强混凝土构件的纯弯性能试验,得到了荷载-挠度曲线、荷载-应变曲线和弯矩-曲率曲线,并分析了试件核心混凝土的破坏模态。试验结果表明:高强方钢管高强混凝土纯弯构件的破坏形态为受弯破坏;核心混凝土裂缝分布均匀,最大的裂缝位于混凝土受拉区跨中截面附近;随着钢材屈服强度的增大,试件的承载力增大;根据弯矩-曲率曲线可以将纯弯构件的受力过程分为弹性阶段、弹塑性阶段和强化阶段。采用有限元分析软件ABAQUS对高强方钢管高强混凝土纯弯构件进行了有限元模拟,模拟结果与试验结果吻合较好。在此基础上,分析了钢材屈服强度、混凝土强度、含钢率对纯弯构件受力性能的影响。分析结果表明,纯弯构件的承载力随着含钢率、钢材屈服强度、混凝土强度的增加而增加,其中,含钢率和钢材屈服强度对构件的承载力影响较大;与钢材屈服强度和混凝土强度相比,含钢率对提高纯弯构件的抗弯刚度影响较大。 相似文献
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提出混凝土受弯构件从加载直至构件破坏全过程非线性分析模式,编制计算程序,给出了其弯矩与曲率、荷载与变形的关系曲线,将混凝土受弯构件的承载力及变形的计算结果与试验结果对比,表明二者吻合良好。 相似文献
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加荷速率对软土地基沉降的影响研究 总被引:2,自引:0,他引:2
软土地基处理技术由来己久,随着现代工程技桩的进步和不断发展,软土地基处理的方法多种多样。通过控制加荷速率减少地基沉降值便是其中一种行之有效的方法。加荷速率太快,会引超地基沉降的增大,控制加荷速率,可以有效地减少地基沉降值。本文以成乐高速公路观音试验段的现场测试资料,提出了加荷速率和沉降速率的具体控制数值,希望能对广大工程建设者有所帮助。 相似文献
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《Engineering Management Journal》2006,16(3):44-45
This paper demonstrates how the experience of working overseas can add value in broadening one's character and diversifying one's communication skills. Gaining overseas experience is advantageous in these times of global-scale thinking to have a greater awareness of the role of an engineer and to understand the benefits and pitfalls it can bring to developing countries. 相似文献
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中国园林的标题风景——园林楹联类析 总被引:7,自引:0,他引:7
楹联是我国特有的一种民族文学文艺形式,是中国园林的文化点缀-中国园林的楹联,在其思想内容方面作了状景,抒情,咏志的划分,游才入其地,无不览景而生情动思。 相似文献
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The use of a multivariate procedure is demonstrated in the analysis of a survey of various firesafety actions and beliefs in a college student population. A canonical correlation analysis identified three significant factors and revealed that performing a safety inspection of one's residence for potential hazards was associated with beliefs in one's personal efficacy in handling fire situations, whereas engaging in more emergency-related actions such as checking to see if one's smoke detector was working properly, knowing the emergency telephone number, having it posted by the telephone, and knowing two exits out of each area of the home was related to beliefs of susceptibility and seriousness concerning fires. A third factor revealed an association between having a sprinkler system (but not a fire extinguisher) present in the place of residence, vacuuming the dust from a smoke detector, and having ever practiced an emergency escape with beliefs reflecting susceptibility to future (but not present) fire hazards, adequacy of firesafety knowledge, and beliefs in the effectiveness of firesafety inspections. It is shown that the results of this analysis can be quite useful in guiding the development of firesafety education materials; also, the need to differentiate the specific motivational approach depending upon the type of firesafety action being promoted with this particular population is revealed. 相似文献
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阐明圆明园在雍正登基以前,作为韬光养晦之地所具有的内然朴素而貌和到他即位以后至乾隆历代的逐步增建,所表现出的皇权思想和皇家气派,以及作为农耕为本的时代,园林中所表现皇帝重农、躬耕、观稼的内容.通过对网明园“田园风光”及“耕织文化”的探索研究,希冀在保护、利用其遗址时,结合北京第二道绿化隔离地区及郊野公园建设,有可能再现一些田园风光,为现代服务.通过对是园林中的田园,还是田园中的园林的思考,期待新一代风景园林设计师的继承、发展和创新. 相似文献
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做设计重要的是态度,对城市、对环境、对建筑以至对人的态度不同,设计的观念、策略和手段也会不同,其结果亦不同,从有礼到有理,不仅做事,也是做人的道理。 相似文献
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We compare people greatly affected by a crisis with those less affected to explore how level of crisis influences their response to experiencing nature. A questionnaire comprising a validated protocol to evaluate frequency of stress conditions, the level of crisis retention, reorientation and rehabilitation potential was answered by 547 individuals. The questionnaire also comprises items on everyday activities. Our findings may be interpreted as follows: experiencing nature has a more powerful influence on the rehabilitation potential of people greatly affected by a crisis; taking a walk also has an influence, although not of equal importance; the social factor has more influence on the rehabilitation potential of people affected by a crisis to a low/moderate degree. Individuals who have many experiences of nature are less affected by their crisis than are those who have few such experiences. We suggest that the rehabilitative effect of nature is tied to its function as an enriched environment. During stays in natural settings, an interaction takes place between sensory stimulation, emotions and logical thought—an interaction that leads to a new orientation and new ways of seeing one's self and one's resources. This seems to largely be a question of how we human beings take in and process information. 相似文献