云南某桥梁结构检测技术研究与ANSYS模拟分析

结合桥梁工程检测实际，对桥梁检测技术和安全状态评估方法进行分析和研究，运用结构安全检测理论、有限元方法和ANSYS数值模拟，对云南省曲靖市内的某大桥进行承载力鉴定试验，并进行安全检测，对检测结果进行了全面分析，并对该桥的工作状况进行安全评估，提出有益的结论。     

房屋建筑工程节能施工技术解析

在对房屋建筑工程进行施工时，不仅需要对其施工质量进行保证，而且还需要采用科学、合理的节能施工技术，对建筑工程的整个节能效果进行加强。文章笔者对房屋建筑工程节能施工技术进行了探讨，希望对相关从业人员具有借鉴意义。     

城市公共绿地建设

由于经济的不断发展，人们对居住环境的要求越来越高。市民强烈要求对人居环境进行改善，并对自然生态进行优化。本文针对城市公共绿地建设，首先介绍了其重要性，然后对其中的问题和解决对策进行阐述。     

超大深基坑地基与基础施工基础探索

以泛海国际SOHO城为案例，主要对该工程深基坑地基与基础施工进行分析，并对其中遇到的问题进行探讨，并提出几点思考。在进行基坑建设中，采用了大型塔式起重机，从而加快了施工速度，提高了工程效率。同时，严格按照相关规范进行施工，有效保证了施工的质量。在进行相关的基础监测后，对基坑的变形状况以及沉降数值都在设计允许范围之内。     

建筑节能背景下暖通空调技术意义及实践探究

随着社会进步，全球的气候逐渐开始变暖，人类所处的自然环境也逐步恶化，全世界加大了对节能建筑的重视。，因此，要加大对暖通空调技术的研究和创新。本文对建筑节能背景下的暖通空调技术的发展现状进行了分析，并据此提出了研究其技术的意义，同时，还对技术设计的原则进行了说明，并对技术的具体实践进行了阐述。     

房屋建筑地基基础施工技术及应用

在建筑工程施工过程中，基础工程建设是较为重要的环节，会直接影响到整个房屋建筑结构质量。对此，在施工过程中，相关人员需意识到地基基础建设的重要性，与此同时，根据各项施工的实际情况进行详细分析，明确各种影响因素，并采取有效的解决措施，应用合理的施工工艺，对整个施工过程实施管控，使得建筑工程施工能够顺利完成。对此，首先对房屋建筑地基基础工程施工的重要作用进行介绍，然后对地基基础施工技术类型进行分析，并以某房屋建筑作为研究对象，对地基基础施工技术要点进行详细探究。     

自保温墙体的结露现象及相关计算

近年来，随着《建筑质量管理条例》的颁布，人们对建筑工程的质量，功能性问题越发重视，在进行夏热冬冷地区的自保温墙体材料的研究过程中，我们发现自保温墙体的结露现象出现机会更大，并对建筑物的功能造成不利影响，因此，对自保温墙体进行结露问题的研究显得比较重要。文章对结露现象发生的机理进行阐述，并根据定量计算对郑州地区的自保温墙体进行分析，以便对结露现象有更有效的防范措施。     

某隧道工程的围岩稳定性实例分析

通过对某隧道工程的实例分析，对围岩应力进行检测，对围岩水平位移数据等进行分析、处理及反馈，根据理论分析和实验结果，对隧道围岩的稳定性进行了评价，认为围岩在现有的支护条件下是稳定的。     

基于小波包能量法的梁结构损伤识别研究

运用小波包能量法对完好的和具有损伤的简支梁进行数值模拟，施加相同的激励，测得结构的响应信号，对信号进行小波包分解，求得各个频段的能量，通过各频段能量的变化进行损伤位置的识别，指出这种方法可以对实际梁结构进行有效的损伤诊断。     

桥梁结构安全检测技术分析

为满足社会经济发展对桥梁工程安全性的需求，除了要做好对施工质量的控制，还需要对其结构安全性进行全面检测，提前掌握存在的问题，并及时采取相应的措施进行管理，保证行车运输的安全性。本文对桥梁安全检测技术进行了分析。     

Tree-ring elemental concentrations in oak do not necessarily passively record changes in bioavailability

Elemental concentrations in tree-rings from red and white oak trees at six sites across Southern Ontario, Canada, were assessed to determine whether they passively record changes in geochemical cycling in the presence of environmental stress. Periods of stress were defined as sustained periods with elevated delta(13)C values in tree-rings relative to atmospheric CO(2) during the same period. In some trees, nutrient concentrations (Ca, Mg, Mn) were erratic during historic periods of stress while chemically similar non-nutrients (Ba, Sr) and the anthropogenic pollutant Pb were not. Tree-ring concentrations of Ca and Sr were related to bedrock type and leachable concentrations in the soil. In contrast, tree-ring concentrations of Mg were not related to bedrock type, although Mg concentration in the soil leachate was. Tree-ring Mn, Ba and Pb concentrations were not related to bedrock type or soil concentrations, but were inversely related to soil pH. Erratic behavior of nutrient elements during historic periods of stress suggests that some nutrient concentrations in the environment were not always passively recorded by tree-rings.     

结构工程抗倒塌设计研究综述

分析了地震、爆炸、冲击等造成结构倒塌的原因,指出了倒塌结构在设计、施工等方面存在的问题;归纳了现行规范在抗倒塌设计方面的相关内容,特别指出了中国规范在这方面的不足;总结了现有的破坏准则和抗倒塌设计方法,指出了其中的不足;最后从破坏准则、设计方法、规范修订等多个方面对今后的研究工作做了展望。     

Pesticides in rain and roof runoff waters from an urban region

The levels of organonitrogen, organochlorine and organophosphorus pesticides were monitored in rain and roof runoff waters in Gdańsk (Poland) over a period of 6 months (October 2000 – March 2001). Buildings included in the study were of different ages, and covered with a variety of roofing materials. Samples were collected during the precipitation events. Pesticides were determined by gas chromatography combined with NPD and ECD detection. Bromofos, heptachlor epoxide and o,p′-DDE were detected the most often in the samples collected. In general, pesticide concentrations were higher in roof runoff than in rainwater. The type of the roofing material had a significant effect on the pesticide levels in runoff waters. The highest analyte levels were recorded in October and November, when the temperature was the highest.     

Natural Aggregates at Makkah Governate, Western Saudi Arabia

 Natural coarse and fine aggregates which accumulated along six selected wadis in the region of Makkah were assessed both qualitatively and quantitatively. The six wadis were Numan, Al-Yamanyah, Al-Shamyah, Hwarah, Alaf and Faydah. More than 440 aggregate samples were collected and their physical, mechanical and chemical properties determined. Petrographic studies on the gravel samples were undertaken to characterise the aggregate types. The results were compared with ASTM and British Standard specifications. The aggregates were generally within the acceptable limits for use in concrete although there were the relatively high values of chloride, sulphate and total dissolved salts in the fine aggregates in Wadis Alaf, Hwarah and Faydah. Nine fine aggregate samples representing upstream, midstream and downstream deposits from these saline wadis were washed in distilled waters after which the aggregates were within the acceptable limits for structural concrete. There were indications of material which could cause alkali-silica in the coarse aggregate at Wadi Faydah. The study proved reserves of 12.5 million m³ of coarse aggregate and 23 million m³ of fine aggregate. Received: 27 May 1998 · Accepted: 18 February 1999     

Material balances of organics and nutrients in an oxidation pond

A series of experiments concerning a tertiary oxidation pond was performed from 10 January to 12 November 1979, using a model oxidation pond of 21 m² in capacity. The concentrations of organics and nutrients in influent and pond water were measured so as to consider the conversion of water quality in a tertiary oxidation pond. The sedimentation rates were measured weekly, and the final sediments were analyzed at the end of experiments, so that the material balances in respect to carbon, nitrogen and phosphorus were calculated and the various transition reactions were evaluated quantitatively. The result of the material balances showed that there were three main reactions in pond: the assimilation to algae; the sedimentation of suspended substance; and the decomposition of sediments. The regeneration rates of nutrients from sediments were so active that the removal of nutrients by algal solidification were not effective. Consequently, the overall removal efficiency of nutrients was 45% in total nitrogen and 43% in total phosphorus by a tertiary oxidation pond with 16 days detention time.     

CONSTRUCTED WETLANDS FOR MINEWATER TREATMENT: PERFORMANCE AND SUSTAINABILITY

Wetlands were constructed between 1995 and 1999 to treat discharges from abandoned coalmines in the Pelenna Valley, South Wales. This was one of the first and most comprehensive demonstrations of passive minewater treatment technology in Europe, incorporating aerobic and anaerobic cells, including 'reducing and alkalinity-producing systems. The wetlands were monitored to assess their performance and longevity and were found to remove 82-96% of the incoming iron, with no decline in treatment performance over the monitoring period to 2002. Oxidation was found to be the dominant iron-removal process, even in vertical-flow cells which were designed to utilise anaerobic processes. Factors limiting the longevity of iron-removal processes were identified. maintenance requirements were highlighted and life-span predictions were calculated for the systems. The wetlands were shown to be an effective and low maintenance (but not maintenance-free) method of treating net-acidic and net-alkaline minewater.     

田菁花粉过敏原的分离、纯化及鉴定

目的：初步分离、纯化及鉴定田菁花粉变应原蛋白。方法对田菁花粉粗提液进行提取,通过十二烷基硫酸钠-聚丙烯酰胺凝胶电泳（SDS-PAGE）对粗提液蛋白组分进行分离,并对其分子质量进行测定。收集10例过敏患者血清,通过免疫印迹法（Western-blotting）对花粉变应原成分进行鉴定,用离子交换层析对其变应原进行初步纯化,并通过免疫印迹法进行鉴定。结果田菁花粉有蛋白条带20余条,其中主要条带有12条,16、19和27 ku为其特异性的过敏原,其中16和19 ku 为其主要过敏原。田菁花粉通过离子交换层析纯化出变应原主要集中在Ⅳ和Ⅰ峰,其对应的分子质量为16和19 ku。结论初步分离、纯化及鉴定了田菁花粉变应原,为临床过敏性疾病的诊断和治疗奠定了基础。     

纳米压痕技术在水泥基材料中的应用进展

介绍了目前常用的几种纳米压痕仪并总结了纳米压痕技术的测试原理,同时介绍了水泥基材料的纳米压痕测试样品的制备过程及注意事项,详细地论述了纳米压痕仪在水泥基材料中的应用现状,分析了这种技术的优势及其存在的问题,展望了其发展趋势和应用前景,最后对该技术进一步发展方向提出了建议.     

浙江某网架锚栓剪断与支座外倾的原因分析

浙江某酒店会议中心螺栓球网架作为楼地面的承重结构,在建成后仅使用1年就发现网架锚栓被剪断,支座存在不同程度的外倾;在对网架增设钢牛腿进行加固处理4个月后,又发现网架楼地面下沉,斜腹杆被拉断,部分杆件严重弯曲。结合现场检测结果,从建设程序和设计、施工质量等方面对网架锚栓被剪断、支座外倾、上弦杆件弯曲和斜杆拉断等原因进行了分析。     

南宁市公园绿地园林植物调查及应用研究

采用实地踏查与资料收集相结合的方法,对南宁市19个公园绿地植物进行调查,从植物种类、生活型、来源、观赏特征、珍稀濒危和毒性等方面探讨园林植物在各绿地中的应用特点及改善建议.结果表明:1)南宁市公园绿地园林植物种类丰富,较为重视乡土和常绿植物应用,共有园林植物549种,隶属115科359属;2)热带植物景观较明显;3)一年四季花果不断,观花植物运用较多,但某些类型植物(藤本、水生、珍稀濒危植物等)运用较少且较集中;4)有毒园林植物应用普遍;5)古树名木较少.提出增加藤本、水生及珍稀濒危等类型植物的应用,添加有毒植物标识牌,加大与植物有关的人文活动等建议.