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Conceptual Design of Super-span Cable-stayed Bridge with
Partial Ground-anchorage and Cross Stays
SHAO Xu-dong，HU Jia，ZHAO Hua
2011, 30(S2):
1188-1191.
DOI: 10.3969/j.issn.1674-0696.2011.supp2.017
This paper presents an original design scheme of super-span cable-stayed bridge，namely，a cable-stayed bridge
with partial ground-anchorage and cross stays，which is appropriate for cable-stayed bridges with main span length around
1500 m． Its main characteristic is that the long stays cross with each other and are anchored in the ground-anchorage，and
thus the long stays result in little horizontal pressure force in the main girder． Studies show that the proposed novel cablestayed
bridge system has the following significant advantages over conventional ones: ① Horizontal pressure forces in the
main girder caused by cables are greatly reduced; ② The cross stays effectively increase the stiffness of the girder in the
span-center region of the main span; ③ As the cross stays can provide dual vertical supports and balance horizontal forces
with each other perfectly，the horizontal angle of long stays can be reduced and the height of tower be decreased to only about
1 /5． 5 of main span length as a result; and ④The long stays form a network in the span-center region of the main span，
which effectively improve the aerodynamic performance of the long stays．
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