【摘要】 为采用统一理论法模拟存在脱空情况的钢管混凝土拱桥的稳定性,利用脱粘折减系数Kt对统一理论法中钢管混凝土的套箍系数进行修正,模拟一钢管混凝土单拱肋的脱粘现象,并与双单元法的模拟结果进行对比,得出两种方法的模拟结果较为接近,不同脱空率的误差均在6.5%以内。脱空率对标准钢管混凝土拱桥稳定性的影响较大,脱空率从0增加到0.8,稳定系数降低了11.9%,但不影响失稳模态。更多还原

【Abstract】 To simulation of the stability of a concrete filled steel tube arch bridge with a void condition by a unified theoretical method,corrected by the debonding reduction coefficient Ktof concrete filled steel tube in the unified theory of hoop coefficient,the debonding phenomenon of steel pipe concrete single arch rib was simulated. The simulation results of two element method are similar to the results of the unified theoretical method,different rates of separation of the error is less than 6.5%. The void ratio has a great influence on the stability of the standard CFST arch bridges,the removal rate increases from 0 to 0.8,and the stability coefficient decreases by 11.9%,but the instability mode is not affected.更多还原