期刊论文

Experimental study on long-term performance of timber-concrete composite beam bridge

中文

建筑结构

1002-848X

2020

17

104-108

国家自然科学基金项目“现代木—混凝土组合结构桥梁设计理论及应用基础研究”(51478485)。

本校为其他机构

本试验制作木-混凝土组合梁桥足尺试验模型,进行为期5个月荷载试验。通过对木-混凝土组合梁桥变形发展过程进行研究,得到木-混凝土组合梁桥跨中挠度-徐变曲线、应力-徐变曲线。采用试验的徐变曲线进行数值模拟分析。通过数值模拟计算结果与试验结果对比可知:数值模拟计算结果与试验结果吻合较好;试验的徐变曲线能真实反映木-混凝土组合梁桥在长期荷载作用下的变形发展过程;并提出了适用于木-混凝土组合梁桥在长期荷载作用下的变形计算公式,组合梁桥最终挠度增长系数为2.13。

A full-scale test model of timber-concrete composite beam bridge was produced in this test,and a 5-month load test was conducted. By studying the deformation development process of the timber-concrete composite beam bridge, the mid-span deflection-creep curves and stress-creep curves of the composite beam bridge were obtained. The creep curve of test was used for numerical simulation analysis. The comparison between the numerical simulation calculation results and the test results shows that the numerical simulation calculation results are in good agreement with the test results, and the creep...