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利用无粘结CFRP筋部分预应力混凝土连续梁板全过程分析程序的计算结果,探讨CFRP筋弹性模量、预应力筋配筋指标、非预应力筋配筋指标、加载方式、跨高比、跨中与中支座相应控制截面配筋指标差异等参数对连续梁板中无粘结CFRP筋极限应力增量的影响规律,进而确定影响无粘结CFRP筋极限应力增量的关键参数。基于仿真分析结果,以关键参数为自变量建立了连续梁板中无粘结CFRP筋极限应力增量的计算公式,可以此为依据计算连续梁板的受弯承载力。
Based on the calculation results of the whole process of unbonded CFRP tendon partially prestressed concrete continuous slab, the elastic modulus, prestressing tendon reinforcement index, non-prestressed tendon reinforcement index, loading method, span ratio, span And the difference of the reinforcement index of the corresponding control cross-section of the mid-support on the ultimate stress increment of the unbonded CFRP tendons in the continuous slab, and then the key parameters affecting the ultimate stress increment of the unbonded CFRP tendons are determined. Based on the results of simulation analysis, the formula for calculating the ultimate stress increment of unbonded CFRP tendons in continuous slab is established based on the key parameters as independent variable. Based on this, the flexural capacity of continuous slab can be calculated.