Research On Shear Capacity Of Lightweight Aggregate Concrete Flexural Member And Bond Anchorage Performance Of High-strength Steel

Lightweight aggregate concrete (LAC) is a kind of concrete used artificial or natural aggregate instead of normal aggregate.It has advantages of lightweight,high strength,good seismic capacity,fire resistance and reducing the overall project cost,etc.It has broad application prospects in the field of civil engineering.In order to promote LAC application in bridge engineering, the shear capacity of LAC flexural members and bond anchorage performance of high-strength steel are researched in this paper, mainly completed the following work:(1) The development and engineering application of LAC is overviewed, research status of LAC flexural members and the adhesion behavior between steel and LAC are summarized, and contents of this paper are proposed.(2) The main influencing factors of shear capacity of LAC is analysed; the influence of concrete strength, reinforcement ratio and shear span ratio on shear capacity of LAC flexural members is analysed by ANSYS, and the shear capacity calculations of countries specifications are comparative analysed.(3) The adhesion behavior between steel and LAC is analysed; The influence of the concrete strength, rebar diameter, anchorage length, stirrup ratio and thickness of concrete cover to bond strength between high-strength steel and high-strength Lightweight aggregate concrete is analysed by pull-out experiment, bond strength formula of them has been got.(4) Countries specifications provisions of anchorage length formula are compared, anchorage length proposed formula has been gived between high-strength steel and HSLAC.