Considering the factors such as randomness of natural lightning locus and the coexistence of primary and secondary leaders, it is necessary to lead in the concept of dynamic lightning protection shielding angle. It is suggested that the angular bisector of practical protective angle formed by ground wire or earth pin in UHVAC transmission line and conductor should be aligned with the direction of lightning leader as well as the ratio of vertical span to horizontal span and the impact of wind speed should be considered.

考慮自然閃電軌跡的隨機(jī)性和雷電主先導(dǎo)與次先導(dǎo)并存現(xiàn)象等因素av在线你懂得，有必要引入動(dòng)態(tài)防雷保護(hù)角概念，建議特高壓交流線(xiàn)路中地線(xiàn)對(duì)導(dǎo)線(xiàn)的實(shí)際保護(hù)角形成的角平分線(xiàn)應(yīng)與雷電先導(dǎo)的來(lái)向一致在线日韩成人电视播放网站视频免费，并應(yīng)計(jì)及垂直檔距和水平檔距的比值和風(fēng)速的影響国产一级片操逼视频。

The structure parameter influences on lateral stability, such as arch axis coefficient, arch high span ratio, crankle rigidity ratio of arch rib, vertical and lateral rigidity ratio of arch rib, lateral rigidity of bridge decking and arch rib ratio, crossbeam number, rigidity of crossbeam number the effect of non-orientedly conservative loadings of bridge deck and width span ratio, were discussed. Corresponding numerical charts were given, and they may be of some reference value and helpful to the parameter design of ribbed arches.

考慮了拱軸系數(shù)、矢跨比狼友视频入口首页面、拱肋抗扭剛度與橫向抗彎剛度比97人妻无码视频在线一区、拱肋的豎向抗彎剛度與橫向抗彎剛度比、橫系梁在拱肋切平面內(nèi)的抗彎剛度和拱肋的橫向抗彎剛度比美国av毛片、橫系梁在拱肋徑向的抗彎剛度與拱肋的橫向抗彎剛度比亚洲校园欧美国产另类性色、橋面系的橫向抗彎剛度與拱肋的橫向抗彎剛度比、橫系梁的數(shù)量日色视频精品、橋面系橫向剛度引起的非保向力效應(yīng)及拱肋間距與跨徑的比對(duì)組拼拱橫向穩(wěn)定的影響日韩欧美性爱综合视频，并給出了相應(yīng)的圖表干死你肏死你视频，為拱橋設(shè)計(jì)時(shí)拱肋的結(jié)構(gòu)參數(shù)的選取提供一定的依據(jù)91看片婬黄大片在线观看。

Placement of late-span value is still an opportunity in the area in large numbers are more optimistic about the first 015 out cross-4,5,6,7,8, 2,3 cross-trumpet area to consider doing less, No. 016 concerns 4, 6,7,8,9 cross-out, rule out the possibility of three cross-value occurs, the first 017 candidates span the value of cross-3,5,6,7,9, 4,8 even cross there is little hope.

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By the research of contact wear loss of Circuit Breaker and on the basis of adopting the prior investigation it brings forward a compositive evaluation method and gives the remainder span on supposed conditions, and realizes the diplex Condition Monitoring of electric endurance and mechanical span.

通過(guò)對(duì)高壓斷路器觸頭電磨損的研究国产精品久久无码HD毛片，在采納前人研究方法的基礎(chǔ)上，提出了一種綜合評(píng)估的方法欧美淫欲视频，并給出給定條件下的壽命裕度婷婷丁香五月一区二区三区，實(shí)現(xiàn)電氣壽命和機(jī)械壽命的雙重監(jiān)測(cè)。

The distribution and the variation of the pre-stressed effective quantities in the cross section of the beam are comprehensively analyzed by the FEA along with the variation of the span numbers, span length and linear rigidity ratio of beam to column, wherefore the effect factors and the specific conclusions of lateral restraints on the pre-stressed formation in the concrete beam are drawn.

本文以豎向支承構(gòu)件有一定側(cè)向剛度的預(yù)應(yīng)力混凝土框架結(jié)構(gòu)為研究對(duì)象午夜免费A级毛片试看，分析了框架梁受到柱的側(cè)向約束時(shí)的受力機(jī)理看毛片视频，并運(yùn)用有限元數(shù)值模擬計(jì)算方法全面分析了隨著梁柱線(xiàn)剛度比、跨度99久久久免费毛片、跨數(shù)等諸多因素的變化v视界影院，框架梁中預(yù)應(yīng)力有效量的分布和變化情況，得到了側(cè)向約束對(duì)框架梁建立預(yù)壓應(yīng)力的影響因素和具體結(jié)論欧美cao。

Deflection and strain of the given section are analysed through dead-load field test, Hanger endogen force, autooscillation character, impactor factor, damage ration of the main span and approch span are analysed.

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In order to demonstrate the practicability of construction excogitation,further to ensure the security of the design and construction,this paper analysed the stress conditions of large span reticulated shell-string structure through simulating the process of construction,monitoring the whole construction process and the complete status of the large span reticulated shell-string structure us.

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So far,a limited number of research papers are related to dynamic response of long-span flexible roofs.Gymnasium roof is a special topic of long-span flexible roof structures,a-nd it is important to study on wind load and gust loading factor in the field of engineering and research.

目前國(guó)內(nèi)外對(duì)大跨度柔性屋蓋的風(fēng)振響應(yīng)研究很少国产欧美三级片网站，本文研究的體育館屋蓋結(jié)構(gòu)的風(fēng)荷載及風(fēng)振系數(shù)作為大跨度柔性屋蓋結(jié)構(gòu)的一個(gè)專(zhuān)題，具有重要的工程應(yīng)用價(jià)值和學(xué)術(shù)研究意義欧美在线精品视频a美国网站。

To satisfy the clear height requirement, the span to height ratios of 20.4 and 22.7 were adopted for the simply supported reinforced concrete secondary floor beams with span of 12.245m and 10.225m respectively for tower A and B of Beijing Goldfield Center.

趙毅強(qiáng)1 色综合久久中文字幕专区一区，柯長(zhǎng)華1，程懋堃1 WWW.午夜一级片.COM，錢(qián)稼茹299久久国产亚洲精品观看，趙作周2，戴夫聰2114毛片，黃小坤3等［提要］北京金地中心工程塔樓A91三级片在线，B為滿(mǎn)足建筑凈高要求，采用了跨度為12.245m和10.225m欧美视频大全，兩端為簡(jiǎn)支的鋼筋混凝土樓面次梁自拍偷拍25页，跨高比分別達(dá)到20.4和22.7。

City of pool of long individual plant group " two model integrated form a complete set of level of state of social " construction reforms test division, its key is to want establish to span the strategic train of thought that type and intensive change development, with the technology innovation, system innovation and social innovation give priority to grasper, make pool of long individual plant city of especially big core, contemporary " of "3+5" of pool of construction long individual plant two model social " city group belt, form south with Guangzhou, north and Wuhan, on the west with Chongqing, east be opposite accordingly with Shanghai, can drive mid economy of Hunan economy and even our country to span the new-style industrialization that type develops is metropolitan area, develop countrywide economy the action of growth pole.

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