孙长全

（北京希地环球建设工程顾问有限公司 ，北京 100044)

摘   要 ：预应力型钢混凝土组合结构施工过程易受材料性能 、结构承载 、极限状态等因素的影响，易导致 承载力下降，为此，研究大跨度大空间建筑预应力型钢混凝土组合结构施工技术。采用后张有粘结预应力施工方法，通过排水孔、灌浆孔、分水管等设置进行混凝土浇筑。在达到设计强度标准后，张拉预应力型钢。在预 应力孔道内灌浆，形成预应力型钢混凝土组合结构。结果表明：钢混凝土组合结构的抗裂性 、塑性内力分布均 有明显提升，使型钢混凝土组合结构具备高承载力和良好的裂缝闭合性能。

关键词：后张有粘结预应力 ；抗拉强度 ；预应力张拉 ；支座控制截面 ；破坏弯矩

中图分类号：TU745 . 2           

文献标志码：A            

文章编号： 1005- 8249   (2024)  06- 0115- 05 

DOI:10. 19860/j.cnki.issn1005 - 8249.2024.06.021

SUN Changquan

(Beijing Xidi Global Construction Engineering Consulting Co. ，Ltd. ，Beijing 100044 ,  China)

Abstract:The construction process of prestressed steel-concrete composite structures is easily affected by factors such as material properties, structural load-bearing capacity, and ultimate state, which can lead to a decrease in bearing capacity. Therefore, research is needed on the construction technology of prestressed steel-concrete composite structures for large-span and large space buildings. Adopting the post tensioned and bonded prestressing construction method, concrete pouring is carried out through the setting of drainage holes, grouting holes, water distribution pipes, etc. After reaching the design strength standard, the prestressed steel is tensioned. Inject grout into the prestressed ducts to form a prestressed steel-concrete composite structure. The results show that the crack resistance and plastic internal force distribution of steel-concrete composite structures are significantly improved, making the steel-concrete composite structure have high bearing capacity and good crack closure performance.

Keywords :  post- tensioned  bonded  prestress ;  tensile  strength ;   prestress  tensioning;   support  control  section;   breaking

moment

*基金项目：北京市自然科学基金项目  (2221082) 。

作者简介： 孙长全  (1976—) , 男，本科， 高级经济师， 工 程师，研究方向： 土建施工管理。

收稿日期：2023- 04- 10