摘要
GFRP筋混凝土桩越来越多的应用于地铁车站端头井等需要后期截桩的基坑工程中,但目前其截面受弯承载力计算方法却并不完善。本文从截面受力平衡分析出发,并考虑了圆形截面特性、混凝土和GFRP筋的材料特性,推导了GFRP筋混凝土圆截面受弯承载力计算公式,能够解决GFRP筋混凝土桩的受弯承载力计算问题。通过理论分析和实例计算可知,本文推导的计算公式与现有方法相比,力学意义更加明确,能够考虑GFRP筋的弹性模量及应力状态对截面受弯承载力的影响。
The GFRP-reinforced concrete pile is applied more and more in foundation pit such as subway station working well, which needs cutting the pile afterwards, but the calculation of its bending capacity is not perfect now. Based on the equilibrium condition of forces, considering the characters of circular cross section, concrete and GFRP bars, this article deduced a calculation formula for bending capacity of GFRP-reinforced concrete with circle cross section. Theoretical analysis and practical calculation show that compared with existed methods, the formula given in this paper has clear mechanical meaning and considered the influence of elastic modulus and stress state of the GFRP reinforcing bars on the bending capacity
出处
《地下空间与工程学报》
CSCD
北大核心
2013年第6期1304-1309,共6页
Chinese Journal of Underground Space and Engineering
关键词
GFRP筋
圆截面
受弯承载力
计算方法
GFRP bars
circular section
flexural capacity
method of calculation
