期刊论文

Fracture Mechanical Characteristics of Simply Supported Hollow Slab with Cracks under Vehicle Load

中文

公路交通科技

1002-0268

2019

36

1

94-101

10.3969/j.issn.1002-0268.2019.01.013

国家自然科学基金项目（51678068）； 长沙理工大学2016年研究生创新性课题项目（CX2016BS02）；

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准确掌握不同损伤条件下桥梁结构的动态特性及其变化规律是动态检测法快速检测与准确评价桥梁安全性的前提,而目前对车辆荷载作用下不同损伤开裂混凝土梁桥断裂力学特征的研究成果还很不充分。基于断裂力学理论,以钢筋混凝土简支空心板为研究对象,采用有限元数值模拟方法,对车辆荷载作用下损伤开裂混凝土简支空心板的断裂力学特征进行了研究。基于裂缝穿过空心板底部受力筋的层数确定开裂深度,通过对车辆荷载作用下8 m标准跨径混凝土空心板中部不同开裂深度的计算分析,得到了不同工况下空心板横截面上裂缝附近的J积分值均呈现由两侧向中间先增加后减小的规律,即裂缝附近J积分值的大小与空心板横...

As the precondition for rapid detection and accurate evaluation of bridge safety by using the dynamic test method,the dynamic characteristics and its change rules of bridge structure under different damaged conditions must be mastered accurately. However, the researches for fracture mechanical characteristics of concrete girder bridge with different cracks under vehicle loads are inadequate. Taking reinforced concrete simply supported hollow slab as the research object,based on the fracture mechanics theory,the fracture mechanical characteristics of concrete simply supported hollow slab with d...