摘要
为了解有效预应力下桥梁结构的受力状况以及应力分布,对某连续梁桥的长弯预应力筋布置测点,实测了多根预应力筋的摩阻损失值,确定了其摩擦损失参数μ、k值。将测点处混凝土应力实测值与ansys模型在理论摩阻下的计算值对比分析,结果表明,实际摩阻损失率比理论摩阻损失率大11.96%;除个别截面受支承处的局部效应影响外,梁体其他截面受力较为平顺,应力的量值也不大。
In order to investigate the force condition and the stress distribution of bridge structure under the effective pres-tressing force, load sensors and stress meters are arranged , the friction loss values of prestressed tendons were measurcdland the friction loss parameter i~ and k were determined. Comparing the measured value of concrete stress with the calculat-ed value, the results show that the actual friction loss rate is 11.96% greater than the theoretical friction loss rate. In addi-tion to the local effects of the individual sections affected by the support, the stress of other beam section is relativelysmooth, the stress value is not large.
出处
《黑龙江交通科技》
2017年第2期79-80,84,共3页
Communications Science and Technology Heilongjiang
关键词
预应力混凝土结构
预应力损失
摩擦阻力
应力分析
prestressed concrete structure
prestress loss
frictional resistance
stress analysis
