Study on Key Parameters of Partially Cable-stayed Bridge Design Based on Research Data
For the problem of lack of sufficient specification guidance on key design parameters for partially cable-stayed bridges,some partially cable-stayed bridges at home and abroad were surveyed and their main parameters were compared and studied with existing relevant regulations and scientific research achievements.The applicability of various structural systems and cable arrangement forms for partially cable-stayed bridges,as well as the value range of important design parameters such as cable inclination angle and spacing,side-to-main span ratio,tower-to-span ratio,cable-to-beam stiffness ratio,and length of the cable-free zone were discussed.According to the results,the cable inclination angle is generally 11 to 35°,the spacing between cables on the main beam is generally 3.5 to 8 m,and the spacing between cables on the tower is generally 0.5 to 1.2 m.When three spans are arranged,the side-to-main span ratio is generally concentrated between 0.41 and 0.70,and the tower to span ratio should be between 1/3 and 1/13.The cable beam stiffness ratio should be less than 30.The ratio of the length of the cable-free zone in the middle span to the span should be between 0.06 and 0.21.
partially cable-stayed bridgesratio of side-to-main spantower-to-span ratiocable-to-beam stiffness ratiolength of cable-free zone
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