Steel moment-resisting frames with welded beam-to-column connection were traditionally regarded as having excellent performance, and widely adopted in steel constructions, but this opinion changed after the 1994 Northrige earthquake and the 1995 Hyogoken-Nanbu earthquake. These earthquakes also arouse engineers to resurvey the behavior of end-plate connections. It is well known that end-plate connections have definite flexibility, which can increase damp, prolong period, and decease swing of structure. So it can reduce the damage, and is one of the best choices for resisting earthquake.

中文題名鋼框架梁柱端板連接在循環(huán)荷載作用下的破壞機理及抗震設(shè)計對策副題名外文題名 Collapse mechanism and design criterion of steel beam-to-column end-plate connections under cyclic load 論文作者郭兵導(dǎo)師顧強學科專業(yè)結(jié)構(gòu)工程研究領(lǐng)域\研究方向?qū)W位級別博士學位授予單位西安建筑科技大學學位授予日期2002 論文頁碼總數(shù)127頁關(guān)鍵詞鋼結(jié)構(gòu)框架結(jié)構(gòu)抗震設(shè)計鋼框架梁柱端板連接館藏號BSLW /2003 /TU392 /6 傳統(tǒng)觀點認為国产黄色视频观看，梁柱焊接剛性連接具有較好的抗震性能2021国产精品露脸在线，因此在工程中得到了廣泛地應(yīng)用那儿有免费黄色A片看看，但1994年的Northrige地震和1995年的阪神地震改變了這種傳統(tǒng)觀點1688在线啪国自产视频，這兩次地震也引起了工程技術(shù)人員對端板連接的再審視。

The experiments of light-weight steel frames with four types of different semirigid joints were carried out.

在鋼框架分析和設(shè)計中精品乱人伦视频，一般都假定梁柱之間沒有相對轉(zhuǎn)動，梁柱之間夾角不變的完全剛接或者梁柱之間不能傳遞彎矩自慰女生在线观看，只能獨立發(fā)生轉(zhuǎn)動的理想鉸接。

In order to establish relative analysis methods and find out transfer rules and vertical distribution characteristics of heavy metals in sediments of Poyang lake,column form sampler designed by us was used in the experiments,the sediments samples from Wucheng section of the Ganjiang River in Poyang lake area were collected using adjacent water vertical spile method.

為建立鄱陽湖水域沉積物中重金屬的相關(guān)研究方法，了解重金屬污染物的遷移規(guī)律欧洲一级电影免费播放视频，并探討底泥中重金屬的垂直分布特征一区二区欧美房事，采用底質(zhì)柱狀采樣器通過臨水垂直插管法采集鄱陽湖流域贛江吳城段的底質(zhì)樣品，利用微波消解—AS-990型原子吸收分析體系對柱狀樣中不同深度的樣品進行重金屬Cu含量的測定国产黄色视频影院你懂的。

At first in the preliminary design this paper computes the linear damping coefficient of the viscous damper employed in this project using Composite Response Spectra approach, meantime, this paper proves that reducing the exponent of velocity of the piston can increase the magnitude of the dissipative energy, because of the viscous damper employed in the practical project character nonlinear behavior; next this chapter performs analysis and comparison between the building without and with the viscous dampers aforementioned when the building suffers from various Time Domain Response, from the angle of displacement, interstroy drift, velocity, interstory velocity, acceleration, energy, maximum axial force of the dampers and of the column etc., in order to prove that the incorporating the viscous dampers into the buildings has great superiority on enhancing its aseismic performance ; furthermore, this chapter also expatiates on diverse assembly form of the viscous dampers that results in the adverse impact on the internal force of the structural member in this building, on the ground of which this segment bring about the preference of the assembly form of the viscous damper; finally this chapter points out the sphere of application of the analysis and computation using Composite Response Spectra approach in design: it is available in well-proportioned stiffness structures and isn抰 available in the structures that contain weak story. It is recommendable, particularly, to incorporate the fluid viscous dampers into this structure that contain weak story to refrain earthquake and reinforce, such as the Central Hall of Shanghai Exhibition Hall.

首先使用了反應(yīng)譜分析法設(shè)計出欲附設(shè)的粘滯阻尼器的線性阻尼系數(shù)国产欧美另类在线专区，由于實際工程所用的粘滯阻尼器具有非線性的特性，故而筆者又證明了降低速度指數(shù)對提高粘滯阻尼器的耗能量的優(yōu)勢所在Jizz中国女人；接著分別從位移精品少妇无码AV在线播放、層間位移手机免费黄色网址、速度、層間速度av激情综合、加速度黄色三级被窝视频天堂网手机在线、能量、最大阻尼出力和柱軸力等不同的角度對結(jié)構(gòu)在附設(shè)粘滯阻尼器前后的時程反應(yīng)進行了分析對比久久黄色精品视频，籍此在實際工程中證明了附設(shè)粘滯阻尼器對于提高結(jié)構(gòu)的抗震性能的優(yōu)越性久艹视频在线观看；再者，筆者還闡述了采用不同的粘滯阻尼器布置方式對結(jié)構(gòu)中構(gòu)件內(nèi)力特別是柱軸力和基座豎向反力產(chǎn)生的不利影響影音先锋日韩资源免费在线观看，并在此基礎(chǔ)上提出了布置方式的優(yōu)選可以直接看的av网址；最后，指出了反應(yīng)譜法在設(shè)計中的適用范圍：對于均勻結(jié)構(gòu)反應(yīng)譜法能夠使用欧美A片视频精品，而對于含有薄弱層的結(jié)構(gòu)反應(yīng)譜法并不適用狠狠干手机；對于類似于上海展覽館中央大廳的含薄弱層的結(jié)構(gòu)尤其值得使用粘滯阻尼器的方法進行抗震加固。

Isolations of the s.aureus insoluble peptidoglycan:(1) the s.aureus insoluble peptidoglycan was gained by cold, hot and hypersound affection repetat of s.aureus(ATCC25923);(2) the s.aureus insoluble peptidoglycan was gained by 10% trichloracetic acid, 5% trichloracetic acid,NH4HCO3 buffer with trypsin digestion of s.aureus(ATCC25923) in order. 2. Isolations of the s.aureus soluble peptidoglycan and quality control:(1) the s.aureus soluble peptidoglycan was released by short dose benzylpenicillin sodium and purified by sephadex G-100.(2) The quality control in the process of isolation: the soluble peptidoglycan was detected by SLP reagent kit; the LPS was detected by kinetic turbidimetric limulus test;and the protein was detected by improved LOWRY reagent kit.

金黃色葡萄球菌可溶性肽聚糖的分離提取及其質(zhì)量控制(1)采用青霉素鈉誘導(dǎo)法和葡聚糖G-100(Sephadex G-100)凝膠柱分離提取金黃色葡萄球菌可溶性肽聚糖mmm色色色；(2)金黃色葡萄球菌可溶性肽聚糖提取過程中的質(zhì)量控制：采用SLP試劑盒對提取物定性檢測黄p网站免费网站在线，應(yīng)用動態(tài)濁度法鱟試驗測定提取物中內(nèi)毒素含量，采用改良LOWRY試劑檢測提取物中蛋白的含量国内精品视频_区二区；(3)采用青霉素誘導(dǎo)和Sephadex G-100凝膠柱分離提取金黃色葡萄球菌可溶性肽聚糖的條件：青霉素使用量一级无码日韩A片视频、加入青霉素后孵育時間和菌液濃度等優(yōu)化選擇。

Three protozoa (Bodo edax, Colpoda cucullus, Amoeba proteus) were isolated from soil. The porous simulation with glass bead, soil column and root box incubation experiments were made to study the association of protozoa movement with phosphorus translocation and its influencing factors. The effects of protozoa on corn growth and corn straw mineralization were also involved. The results showed that protozoa movement in glass bead column was greatly controlled by the pore sizes. Bodo edax, about 5-7 m, could pass through the pores of 28-20 11 m in diameters. Colpoda cucullus (30-60 m) could move through the pores of 155~116 m. However, no Amoebaproteus(100~150 m) was found in the effluents from all the columns. All the three protozoa made 32P redistribution in soil column.

本研究利用土壤中常見的3種原生動物(梨波豆蟲Bodo edax黑人巨大精品欧美在线观看、僧帽腎形蟲Colpoda cucullus免费无码不卡在线播放、大變形蟲Amoeba proteus)，通過玻璃珠孔隙模擬欧洲爽爽网站欧美、土柱及根箱培養(yǎng)試驗欧美成视频黑人大屌，研究3種原生動物運動與磷素運移之間的關(guān)系及其影響因素，以及原生動物對玉米磷素營養(yǎng)的影響BBB在线，同時對3種原生動物在玉米秸稈分解中的作用做了初步的探索久国产在线，研究結(jié)果表明：原生動物的運動與孔隙密切相關(guān)，Bodo edax(5～7μm)能夠穿過28～20μm孔隙在线免费播放黄色视频，Colpoda cucullus (30～60μm)只能穿過155～116μm的孔隙蜜臀av在线免费观看，而Amoeba proteus(100～150μm)不能從玻璃柱中流出。

Solute diffusion controlled solidification model was employed to simulate the columnar to equiaxial transition of TiAl alloy casting. The simulation results show that solute shock wave occurs when the diffusion fields of columnar and equiaxial dendrites meet.

利用溶質(zhì)擴散控制模型對TiAl合金柱狀晶/等軸晶轉(zhuǎn)變過程進行了數(shù)值模擬日韩区小视频.免费，結(jié)果表明国产精品欧美一区色，等軸晶在柱狀晶前沿形核及生長過程中，當兩個擴散場相遇時鸥美理论在线，觀察到成分沖擊波天天色狠狠干，它可能是導(dǎo)致柱狀晶停止生長的一個主要原因。

A SPE procedure was suggested for extracting and concentrating fisetin by using different volume fractions of ethanol in aqueous solution as the loading conditions.

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By flotation experiment of coal slurry water, the influence of concentration of coal slurry water on floatation results in practice was illuminated, and the important significance of the study on the frother specialized in the recovery of coarse granule powdered coal was proposed.

通過浮選柱煤泥浮選試驗說明了煤泥水濃度在實際生產(chǎn)中的影響結(jié)果打飞机的网站，提出研究生產(chǎn)專門針對用于浮選柱浮選的起泡劑對浮選柱回收粗顆粒粉煤的重要意義欧美在日韩一区线观看。

Compounds were identified by means of physic-chemical property and spectral data including three new compounds: platyphyllin A (1), neochlorgeniclatone (2),(2E,6Z)-2,6-dimethyl-8-O-β-D-glucosyl-2,6-octadienoic acid (3). The known compounds included cyclic diarylheptanoids, phenylic acid, ect.

從白樺葉的水提取物中，利用各種色譜分離手段(硅膠柱色譜一级做a爰片久久毛片A片视频、聚酰胺柱色譜黄色网站在线入口大全、凝膠柱色譜及制備薄層色譜等)，分離得到28個化合物一级特黄AAA大片兔费app，通過理化性質(zhì)及各種波譜數(shù)據(jù)(NMR一级特黄性色生活片一区二区，MS，IR免费的毛片网站，etc)鑒定了23個化合物的結(jié)構(gòu)狼友最新地址入口，其中新化合物三個：platyphyllin A(1)，新綠原酸內(nèi)酯(neochlorgeniclatone亚洲色大网站www永久网站，2)视频一区欧美，(2E，6Z)-2人人干人人操人人舔，6-二甲基-8-O--2欧美色图图区，6-辛二烯酸(2E，6Z-2韩国午夜理论片在线观看手机，6-dimethyl-8-O-β-D-glucosyl-2无码观看一区，6-octadienoic acid，3自拍日韩中文无码视频。