Nghiên cứu công nghệ bê tông siêu tính năng (UHPC) ứng dụng để thiết kế chế tạo dầm cầu tiết diện chữ U, nhịp 30m, phân đốt căng sau

Abstract

Research on Ultra High Performance Concrete (UHPC) technology applied to construction infrastructure in general, especially traffic infrastructure (road bridges) is a research area of interest to the world as well as in Vietnam. With many superior features compared to conventional reinforced concrete, UHPC allows the production of fishing girders with thin dimensions, light weight, high corrosion resistance and long service life, short construction time and very small maintenance fee. This paper presents studies on using UHPC to fabricate U-section segmented bridge girders, post-tensioning.

Keywords: Ultra High Performance Concrete - UHPC, U-section beam segmentation; post-tensioning; ultimate limit state; serviceability limit state; micro steel fiber; flow; compressive strength; flexural strength; tensile strength; modulus.