【摘要】 波纹钢腹板体外预应力组合梁作为一种新颖高效的桥梁结构正在引起广泛关注。在对波纹钢腹板的抗弯性能进行理论分析与试验验证的基础上 ,合理简化计算模型 ,建立了受弯条件下波纹钢腹板体外预应力组合梁全过程非线性分析的计算方法和计算程序。分析中计入了材料非线性的影响 ,能综合考虑不同加载方式、不同截面形式、不同转向和布索形式多种情况 ,并能计算从加载到破坏各个阶段下混凝土、钢筋、预应力索的应力和梁的挠度。最后对四片波纹钢腹板体外预应力简支梁进行了弯曲破坏试验 ,并与全过程非线性分析程序计算结果进行了对比分析 ,同时结合试验对普通非预应力钢筋对梁极限状态下力学性能的影响进行了探讨和分析。更多还原

【Abstract】 Prestressed composite beams with corrugated steel webs,as novel and effective structures,are arousing wide concerns.The mechanical behavior of externally prestressed composite beams with corrugated steel webs is investigated and analysed by using a nonlinear all-stage-analysis program,taking account of the influence of material nonlinearity.Stresses and strains in concrete and tendon are obtained for all loading stages,from start to failure.Four beams with corrugated webs are tested to bending failure.Comparisons between the theoretical and testing results are satisfactory.Parametric study is conducted to examine the effects of reinforcements.更多还原