The bottom chord of the truss adopts 3Φ500 CFST, and the upper chord adopts 4Φ450. The bridge was designed in 1998, put into construction in 1999, and complete in April of 2001. During this period, I have analyzed and studied on the design and construction of the bridge.

The radial truss upper chord joints of Guangzhou Gymnasium steel roof are the welded joints between square steel pipe and round steel pipes,they are formed"K"or"T"shape The bottom chord joints are the welded joints between steel pipes and steel bar that is welded at the bottom of the vertical web member The test of the upper and bottom chord joint is introduced, the finite element analysis of the joint and the design of the joint are introduced as well

The Selection and the Analysis of the Upper Chord of the Prestressed Cantilever Arched Truss Bridge and the Reasonable Bending Stiffness Ratios of the Arch

The possible shear of the upper chord will change beam from flexural member to member under flexure and compression force. This is emphasised through design example.

It is also found that the rigidity of each member of truss in ultimate strength state is diffe- rent from its elastic rigidity,especially for the compressive rigidity of upper chord,and thus the authors provide a rather simple and applicable calculating formula.

The Pizhou viaduct on Jinghang Grand Canal is a double-faces and double-towers prestressed oblique-pulling truss. Engineers applied prestress on its upper chord bars,bottom chord bars and some tension members and adopted a series of measures to ensure stress-balance of bars in every construction stage.

Under loading condition, the lower chord of a girder truss is subjected to the combined action of prestressed compression, large axial tension, moment, shear and torsion, while the upper chord is subjected to the combined action of axial compression, moment, shear and torsion. The analysis of the results of 5 bottom loaded trusses,2 top loaded trusses and 10 beam models subjected to compression, moment and torsion shows that the calculation of such members by the formula of the torsional strength of the...

Under loading condition, the lower chord of a girder truss is subjected to the combined action of prestressed compression, large axial tension, moment, shear and torsion, while the upper chord is subjected to the combined action of axial compression, moment, shear and torsion. The analysis of the results of 5 bottom loaded trusses,2 top loaded trusses and 10 beam models subjected to compression, moment and torsion shows that the calculation of such members by the formula of the torsional strength of the flexure torsion members in current code(TJ 10-74) and the principle of superposition are not adaptable, otherwise the results would be too safe. Practical formulas for computing the torsional strength considering the combined action of above mentioned forces are presented. Both calculated and test results are in good agreement.

This article deals with the Elasto-Plastic behaviours of reinforced and prestressed concrete trusses on the basis of statical loading tests。 Where the Stress Performances,breaking forms,load-flexibility curves and axial or bending rigidities of each member are all com- prised。 In this article,It is found that the shearing stress of upper chord, do affects its compression strength thus,a preliminary relevant calcula- ting formula is provided It is also analysed that in the ultimate streng- th state of prestressedo...

This article deals with the Elasto-Plastic behaviours of reinforced and prestressed concrete trusses on the basis of statical loading tests。 Where the Stress Performances,breaking forms,load-flexibility curves and axial or bending rigidities of each member are all com- prised。 In this article,It is found that the shearing stress of upper chord, do affects its compression strength thus,a preliminary relevant calcula- ting formula is provided It is also analysed that in the ultimate streng- th state of prestressedo trusses,the magnitudes of secondary internaI for- ces are so large that they should not be neglected.It is also found that the rigidity of each member of truss in ultimate strength state is diffe- rent from its elastic rigidity,especially for the compressive rigidity of upper chord,and thus the authors provide a rather simple and applicable calculating formula. For analysing secondary-internaI forces of the truss,the authors suggest a calculating criterion and a practicable simple method which may be called as-“beam analogy method”

The emphasis of this paper is placed on the description of a series of calculating analyses of the extreme internal forces on the members of a prestressed concrete cantilever arched-truss bridge under live loads. The calculations are made by adopting the finite alement method by plane beam elements. We apply the dynamic programming to decide the use of the truck loading and carry out five different bending stiffness ratios and area ratios of upper chord's section to lower chord's section, thus the...

The emphasis of this paper is placed on the description of a series of calculating analyses of the extreme internal forces on the members of a prestressed concrete cantilever arched-truss bridge under live loads. The calculations are made by adopting the finite alement method by plane beam elements. We apply the dynamic programming to decide the use of the truck loading and carry out five different bending stiffness ratios and area ratios of upper chord's section to lower chord's section, thus the magnitude range of these ratios is found.