轻骨料混凝土构件抗火性能的研究

A Study on Lightweight Aggregate Concrete Member for Fire Resisting

本文对40个粉煤灰陶粒混凝土T形截面柱体,在常温100℃～900℃范围内的不同温度和荷载同时作用下的强度、变形、弹性模量和应力—应变关系等进行了实验和理论研究工作.探讨了试件在高温和荷载共同作用下的变化规律,着重分析了不同温度和荷载共同作用下的破坏特征、强度、极限压应变、弹性模量和应力—应变关系等方面的影响,采用了合理的模式,经过理论分析和推导,建立了简洁实用的公式,并用计算机分析,表明理论计算与实验结果符合较好.

This paper studies the material strength,deformation,modulus of elasticity and stress - strain relationship based on the testing specimens which consist of 40 T ?type section expanded fly ash concrete respectively under the conditions of normal atmospheric temperature and the temperatures ranging, from 100℃ to 900℃combined with various static loads. Emphasis is laid on the analysis of failure characteristics,ultimate compression strain,strength,modulus of elasticity for member and stress-strain relationship under the action of elevated temperatures and loads simultaneously. The proposed calculation formula in this paper can be used in practice and the computer employed shows that the calculated results agree fairly with the experiment ones.