索塔高度对超低边中跨比混合梁斜拉桥体系力学性能的影响

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AbstractThecable-stayed tower is the key to the design of cable-stayed bridges.However，forultra-low-side mid-span ratio hybrid girdercable-stayed bridges，its force form has unique characteristics.In orderto clarify theeffectof heightof thecable-stayed toweronthe hybrid girdercable-stayed bridge system，parametric finite elementanalysis is carried out in this study.This study has investigated therule of the influence of the height of the cable-stayed tower on the stress performance of the cable-stayed bridge with smallside-to-middle-span ratios.The study shows that with the increase in the height of the cable tower，the stress performance of main span steel girders，towers，and cable-stayed cables have improved. However，the stress performance of the concrete main girders at the side spans are not affcted with the increase in the height of the cable tower.In addition，the stabilitycoeficient of cable-stayed bridges increasesand then decreases with the increase inthe height of the cable tower.

Keywordscable-stayed bridge，hybrid beam，finite element，heightof tower，analysis of system forces

0 引言

混合梁斜拉桥因其跨越能力优秀，能充分利用材料性能而越来越受到桥梁工程师的重视。（剩余9272字）