欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
北京地铁5号线立水桥-立水桥北站段第2联结合梁桥首次综合施加强迫位移、预加静荷载和张拉高强钢筋三种方法对负弯矩区混凝土施加预压应力,施工工序复杂.为判别该施工方法能否有效控制裂缝开展,保证施工质量及安全,分别采用ANSYS数值模拟和施工监测手段对其各施工阶段的应力和变形进行了研究.结果表明,采用现有通用有限元软件可很好地对实际施工过程进行仿真分析,施加强迫位移、预加静荷载和张拉高强钢筋三种方法综合使用可有效为负弯矩区施加预应力,其中预加静荷载法最有效,但对钢梁内力及变形影响较大.
英文摘要：
The 2^th segment of Lishuiqiao to north of Lishuiqiao station in subway Line 5 in Beijing is a composite beam bridge. To prevent the incoming of concrete cracks, jacking up mediate supports and preloading heavy static load as well as pretension of high-strength bars were adopted into a new treating method, which made construction process more complex. Therefore, both numerical simulation analysis and real time monitoring were performed to determine the effectiveness of the new method and ensure the quality and safety of the whole construction course. Numerical results agreed well with test results, which illustrated that finite element analysis could simulate real construction process of bridges successfully. Additionally, concrete in negative moment regions of this bridge had been imposed sufficient compressive stress by the new method. Moreover, preloading static heavy weight had significant effect on both inner force and deflection of the steel beam.
同期刊论文项目
同项目期刊论文
期刊信息
位置：