标准规范下载简介：

内容预览由机器从pdf转换为word，准确率92%以上，供参考

悬索桥Cable Stayed Bridges.pdf

Fig 25BrooklynBridge,United States,1883

improved the anchorages for the stays and replaced timbe parapets by rolled steel uprights, so as to increase the stiffness ofthe deck It was not until 1899 that the French engineer A Gisclard further advanced the development of stayed bridges by the introduction of a new system of hangers, at the same time

NY/T 2338-2013 亚麻纤维细度快速检测 显微图像法CABLE STAYED BRIDGE

Fig. 2.6.A/bert Bridge, England, 1872

HISTORICAL REVIEW

Fig.2.7.Bridge at Cassagne, France, 1899

Fig2.9TempufAqueduct,Spain,1926

Fig.2.10 Railway bridge over the Elbe, Germany.1938

Their economyon the other In 1955hebuilt thebridge at Stromsund (Fig2.11),considered today as the first modern steel cable stayed bridge Following this success, the potential advantages of cable stayed bridges were progressively recognised and exploited Subsequently,a great number of such structures were built all over the worldAt first,onlya fewvery strong concentrated stays were introduced as a substitute for piers, which would have hindered navigation.The most outstanding examples of such concepts can be found in the city of Duisseldorf, Germany Since all the bridges had been destroyed during the war, the city architect, Professor Tamms, insisted that for their replacement cable stayed bridges of similar,but not identical, harp configuration should be erected (see Fig 3.15) These are the Theodor

CABLE STAYED BRIDGES

Fig. 2.11.Bridge at Stromsund, Sweden,1955

Fig.2.14. MaracaiboBridge,Venezuela,7962

HISTORICAL REVIEW

ig.2.15.Friedrich Ebert Bridge,Germany.1967

CABLE STAYED BRIDGES

Fig.2.16.Impression of the Grand Viaduc de Mi

g.2.76.Impression of theGrand Viaduc deMillat

with his proposal for the crossing of the Strait of Messina (Fig 3.22),that spans of 1750 m and more are perfectly feasible. Inadditiontotheirstructural andeconomical advantages, cable stayed bridges owe their popularity to their elegant transparent appearance They offer great freedom of formal expression which many architects have tried to exploit. In this field, good cooperation between engineers and architects can indeed be very helpful The audacious Grand Viaduc de Millau (Fig 2.16), due to be built in the near future over the Tarn Valley some 250m above the ground with continuous spans of 340m,is an excellent example of such a fruitful collaboration. However, the search for originality at any price leads some architects to conceive cable stayed bridges which violate statical reasonableness so ostensibly that the genuine beauty of this type of structure is all but lost

Bibliocraphy

HISTORICALREVIEW

3. General design

CABLE STAYED BRIDGES

19 3.3.4. Compositedecks 3.3.5. Special designs 53 60 19 19 3.4. Pylons 22 3.4.1 Introduction 63 25 3.4.2 63 Longitudinal configuration 37 3.4.3 63 Transverse configuration 3.4.4. Operational qualities required and 64 39 constructional details 39 Aestheticsand economy 68 3.4.5. 42 3.4.6 Choice of materials 69 43 71 References

3.1introduction

GENERALDESIGN

32.L.ayoutofcablestays

The layout of the cable stays is one of the fundamental items in the design of cable stayed bridges It influences, in fact, not only the structural perfotmance of the bridge, but also the method of erection and the economics In the transverse direction, the majority of existing structures consist of two planes of cables,generally on the edges of the structure (Fig 36(b)) However, several bridges have been successfully built recently with only one central plane of cabies (Fig 3.6(a). In principle, it is quite

CABLE STAYED BRIDGES

2. (above and facing page).Knie Bridge Duisseldorf.(

GENERAL DESIGN

Fig.3.5.Bridge with crossed stays

322Numberof planes

221.Central suspension systems

Centrai suspension syster

GENERAL DESIGN

Fig3.6.Transverselayoutofstays

Fig.3.7Longitudinallayout of stays

CABLE STAYED BRIDGES

(b) Cable stayed bridges provided with vertical lateral suspension The stays, which are in tension and almost rectilinear, ensure a more rigid connection between the pylons and the deck. The deformations of the latter are thus due only to the moderate variations of the stresses in the cables and the deformations of the pylons. Vertical suspension does not give rise to any clearance problem above the deck. The width of the deck depends on the minimum distance required for the arms of the Pylons.It is possible to reduce this even further by placing these arms outside the deck, beyond the plane of the stays. It is then generally necessary to balance the transverse bending of the pylon, introduced by the deviation of the cables, by means of uppe bracing The erection of pylons consisting of vertical arms is simple and economical

323Longitudinal layout

3.2.31.Harppatteri

3.231.Harp patteri

Whilst the harp pattern is not the best from the static or conomic point of view,it is attractive because of its undeniable aesthetic advantages The fact that the cables

GENERAL DESIGN

At first sight, the fan pattern appears less attractive, from the aesthetic point of view, than the harp pattern, because oi the optical effect of the crossing of the cables, depending on

GENERAL DESIGN

GENERAL DESIGN

CABLE STAYED BRIDGES

g.3.10 Deformationsofthe structure,depending on the ensionmethodadopted

l NewBurrardinletCrossing,Vancouver:proposal

GENERAL DESIGN

Fig. 3.12. Severin Bridge, Cologne, Germany

Fig. 3.13. Lateral suspension: distribution of transverse forces

stay in the Pylon, and for aesthetic reasons, the first bay is generally somewhat laiger than thenormal cable spacingthroughoutthe bridge

CABLE STAYED BRIDGES

Fia 3.14(a) Proposal for the Rhone Bridae at Riddes. Switzerland

Fia 3.14(a) Proposa/for the Rhone Bridae at Riddes.Switzerland

GENERAL DESIGI

all view of bridges crossing the Rhine at Dusseldorf, G

CABLESTAYEDBRIDGES

GENERAL DESIGN

CABLE STAYED BRIDGES

.3.18.Speyer Bridge,Ger

Fig 3 19. Lumberjack's Candle Bridge, Finland

havebeenpossibletousethetwo2mshorebaysto balance,at leastpartially,the main spanof 126m However, it must be said that the jury who awarded the first prize to this design were justifiably attracted to theoriginalityofthe architecturalconcept,which harmonises with the surrounding countryside

GENERAI DESIGN

3 20 Proposal for crossing the Ganges"in India (F.L

324 Stay spacing

CABLE STAYED BRIDGES

Fig.3.21.Danube Bridge.1°Metten,Germany

GENERALDESIGN

ig.322.Proposal for crossing the Straits of Messina

Ihe spacing of 3 m mentioned seems very small for concrete deck, but this choice appears to have been dictated more by considerations of aesthetics than by criteria of economics or statics

331 General

CABLE STAYED BRIDGES

(above and facing page) Bridge over the Rio Ebro. Sp

DB61T 1269-2019 村庄环卫保洁服务规范CENERAL DESIGN

GENERALDESIGN

CABLE STAYED BRIDGES

GB/T 38608-2020 油墨中可挥发性有机化合物（VOCs）含量的测定方法capacities of the stays, pylons and foundations. The following figures may be used as indications:

Ihe cost of manufacture of steel sections is, today, very high. It is thus necessary to analyse very carefully all the consequences of the choice of the deck system in order to obtain themost satisfactory overall answer.

GENERAL DESIGN