摘要
以某预应力混凝土连续刚构桥为例,结合实体工程出现的箱梁腹板开裂现象,选取一个节段进行局部有限元建模分析,发现混凝土主拉应力超过规范限值,通过增大腹板厚度,有效解决了后续梁段腹板开裂问题,并进行了引起腹板开裂的参数敏感性分析,提出了多种解决方案。
Taking the prestressed concrete continuous steel rigid bridge as an example, combining with box girder web cracking phenomenon, the paper analyzes local finite element modeling by selecting a section, finds out major concrete stressing limits. Through increasing web thickness, it effectively solve continuous beam web cracking problems, and analyzes web cracking parameters sensitivity, and finally puts forward various solving schemes.
出处
《山西建筑》
2015年第7期170-172,共3页
Shanxi Architecture
关键词
混凝土箱梁
纵向预应力
腹板开裂
有限元分析
concrete box girder, longitudinal prestress, web crack, finite element analysis
