预应力混凝土先简支后连续梁静、动力试验研究

简要介绍预应力混凝土先简支后连续梁1∶5模型设计、试验方法。根据弹性试验、开裂试验和破坏试验结果,研究分析该类结构的工艺特点、正常使用荷载作用下结构受力变形特征、结构特别是湿接缝截面的抗裂性、开裂区域裂缝发展分布规律以及结构极限承载力。在对模型梁体系转换前、后和先简支后连续梁破坏前、后动力测试与理论分析的基础上,校核模型梁的刚度、制作精度,最后初步探讨了先简支后连续梁的动力性能。

Static and Dynamic Test Study on Prestressed Concrete Beam Constructed by Simple and Continuous Support

The paper concisely introduces the design on a scale of 15 and test method of prestressed concrete model beam constructed by simple and continuous support. Based on the test results about elasticitycrazebreakage of model beam,the characteristic of technologythe straindeformation under the normal loadthe anticrack property especially in the wetjoint sectionthe regularity of crack growth and distribution in the cracking zones and the ultimate carrying capacity were analyzed. Based on the dynamic test and theoretical analysis of model beam beforeafter transition and break of structure,the stiffnessprecision of model beam were checked,the dynamic performance of beam constructed by simple and continuous support were initially discussed.