Korean civil engineers: handling of natural disaster management and its implication

Economic damages, which are influenced by diverse natural disasters, have had quite an impact in Korea. Civil engineers in the country have played a major role in managing floods accompanied by typhoons. This study aims to improve the role of Korean civil engineers in natural disaster management. Comparative perspective was used as the major methodology. Civil engineers' dominance‐oriented management was compared to coordination‐oriented management through four variables, namely civil engineering employees, civil engineering researchers, civil engineering businessmen and other professionals. The key finding is that Korea has to change its civil engineers' dominance‐oriented management into coordination‐oriented management. Similarly, other nations may apply the lessons learned from Korea to their cases via the social impact of disaster, trust relations, participatory approach, various networks, emergency plans, training and exercises and the value of equity.     

基础筏板大体积混凝土温度场数值模拟与分析

以法门寺合十舍利塔基础筏板施工为例,根据三维热传导理论,采用有限元软件模拟承台大体积混凝土温度场,计算结果与工程实测相对比,表明计算结果与实际较吻合;分析不同养护情况对混凝土温度场的影响,结果表明养护情况对混凝土表面温度及降温阶段中心处混凝土温度影响很大,提出预防温差过大导致混凝土产生裂缝的措施。此方法可为类似工程提供参考。     

西部民族地区中小城市特色塑造——以云南省楚雄市城市特色研究为例

西部民族地区中小城市不断发展壮大,但在城市发展建设中未能展现出独有的民族文化特色。该文以云南省楚雄彝族城市特色研究为例,对城市特色塑造过程中体现出的特点及存在问题进行分析,并对楚雄市整体城市特色结构进行了梳理,提出西部民族地区中小城市特色塑造应注重挖掘文化,强化特色;继承传统,发扬创新;明确定位,把握重点。希望能为西部民族地区其他类似中小城市特色塑造提供经验。     

土工格栅在高填方挡土墙中的应用

结合具体的实例，对土工格栅加固挡土墙的机理怍了阐述，介绍了HDPE土工格栅加筋土在高填方挡土墙设计施工中的应用及施工方法，指出了土工格栅挡土墙的诸多优点，具有广泛的应用前景。     

丽江市中心城区公共空间分异研究

社会空间的分化与极化是当代城市空间结构的主要特征。经济转型伴随了社会分异程度的增加,带来新的社会空间结构。对于旅游城市,旅游经济对其社会空间结构影响较大,这种影响又区别于其他一般城市。该文从公共空间的视角出发,通过对丽江的实地调研,分析丽江在旅游城市化的过程中,中心城区公共空间的构建以及在旅游影响下游客、本地居民与外地居民对其的使用情况从而产生的分异现象,这种分异现象反映出丽江在旅游城市化过程中产生的公共空间不平衡、民族文化失色和社会阶层分化加速等问题。     

气体灭火系统中的泄压口设置问题

分析了在气体灭火系统防护区中设置泄压口的必要性,讨论了泄压口的大小及设置的位置和方法。     

Adsorption and desorption characteristics of mercury(II) ions using aminated chitosan bead

Adsorption and desorption characteristics for mercury ions using aminated chitosan bead which showed very high affinity to mercury ions were studied. The adsorption of mercury ions using aminated chitosan bead was an exothermic process since binding strength each other increased as the temperature decreased. And the adsorption of mercury ions was almost completed in 100 min at 150 rpm. In case that adsorbent dose increased, mercury uptake capacity decreased, while, removal efficiency increased. The beads were not greatly affected by the ionic strength, organic material and alkaline-earth metal ions. Mercury ions adsorbed on aminated chitosan bead were desorbed effectively about 95% by EDTA and the adsorption capacity of the recycled beads can still be maintained at 90% level at the 5th cycle.     

地铁盾构区间侧穿建筑物施工控制技术的相关分析

立足于某地区工程的实际情况,阐述了其地铁盾构区间侧穿建筑物的各方面条件,并从设备选型控制、盾构掘进参数控制以及注浆控制方面内容着手,对地铁盾构区间侧穿建筑物施工控制技术的应用进行了详细分析,旨在为相关工作人员提供参考.     

Computer modeling of the continuous annealing furnace

A computer program to calculate the strip temperature heated in the continuous annealing furnace was developed, using the zone method for radiative heat transfer analysis with the measured gas temperature in the furnace. Using theF _E Operator, the present study considered the effects of soot and transient species, in addition to the H₂O−CO₂ gas mixture on the gas radiative heat transfer. The predicted strip temperature distribution forF _E=1.05 represented well the measured data. The maximum difference in the heat flux transfered to the strip from the combustion gas forF _E=1.0 (without soot and transient species gas radiation) and 1.05 (with soot and transient species gas radiation) was about 15%. The present study also investigated the effects of line speed and thickness variations on the strip temperature, establishing the bases for the on-line computer model.     

Flexural and shear behaviors of welded H-beam fabricated with hot-rolled steel coils

HR (Hot-Rolled steel coil) plates are produced by straightening hot-rolled steel coil with a primary objective to substitute conventional thick plates, thereby avoiding a number of difficulties encountered in the production and shipment of thick plates and relieving supply problems. In order to evaluate the applicability of HR plates to building structures under KBC 2009 steel design provision, a total of four full-scale welded built-up H-beam with simple supports are tested together with associated key material testing. The full-scale beam specimens are respectively classified into two categories; the flexure-dominated beam and the shear-dominated beam; to evaluate both the bending and shear strength separately. In the material test the HR plates satisfy both the tensile mechanical properties and the CVN toughness which are required in the current material specification. Both the flexure-dominated and the shear-dominated beams exhibit sufficient capacities that exceed the nominal strengths specified in the KBC 2009, thus confirming the applicability of the HR plate.