摘要
根据预应力混凝土叠合受弯构件受力机理提出了考虑施工阶段与使用阶段两阶段受力的先张法预应力混凝土叠合梁使用阶段钢筋应力计算方法,填补了我国现行规范空白,并修正了规范中预应力混凝土叠合梁使用阶段裂缝宽度计算方法。参考美国ACI 318规范通过名义拉应力控制预应力构件裂缝的有关规定,基于具体工程提出了我国规范体系下先张法预应力混凝土T形叠合梁针对不同裂缝限值的名义拉应力控制建议值。
According to the stress principle of prestressed concrete composite flexural members,the paper put forward the calculation method of the steel stress about pretensioned prestressed concrete composite beams in service stage,which takes into account the two stages of stress in construction stage and service stage,filling the gap in the current standard in China.The paper also revised the calculation method of crack width in the service stage about prestressed concrete composite beams in the code.Referring to the relevant provisions of American ACI 318 Code on controlling the cracks of prestressed components through nominal tensile stress,based on specific projects,the recommended nominal tensile stress control values for different crack limits of pretensioned prestressed concrete T-shaped composite beams under the Chinese code system were proposed.
作者
李星宇
王晓锋
赵广军
王少钦
贾粤
LI Xingyu;WANG Xiaofeng;ZHAO Guangjun;WANG Shaoqin;JIA Yue(College of Civil Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Central Research Institute of Building and Construction Co.,Ltd.,MCC Group,Beijing 100088,China;China Academy of Building Research Co.,Ltd.,Beijing 100013,China;College of Science,Beijing University of Civil Engineering and Architecture,Beijing 100044,China)
出处
《工业建筑》
2024年第10期46-52,共7页
Industrial Construction
基金
国家重点研发计划(2022YFC3801800)
国家自然科学基金项目(52178184)。
关键词
先张法
预应力
叠合梁
裂缝计算
名义拉应力
pretension
prestress
composite beam
crack calculation
nominal tensile stress
