CONSTITUTIVE LAW FOR THE VISCOELASTIC BEHAVIOUR OF EARLY AGE CONCRETE IN MASSIVE STRUCTURES

摘要：

　　In massive concrete structures heat of hydration can cause high internal temperatures leading to high tensile stresses that may induce cracking at early ages.For realistic calculation of strains and stresses an exact description of the time dependent evaluation of the heat release and the mechanical properties of early age concrete is necessary.This paper presents experimental results and models for the description of thermal and mechanical properties of early age concrete.A new model based on an aging Kelvin chain is developed to describe the viscoelastic behaviour of hardening concrete.This model is able to describe the viscoelastic behaviour consistently distinguishing between reversible and irreversible strain parts for arbitrary boundary conditions.It uses an incremental formulation such that it can be implemented straightforwardly in finite element simulations using common time-integration methods.

作者: Wibke Hermersclnidt Harald Budelmann

作者单位: iBMB,Technische Universit(a)t Braunschweig,Germany

会议类型: 国际会议

会议名称: The Fourth RILEM International Symposium on Concrete Modelling (CONMOD 2014)(第四届RILEM混凝土材料建模国际会议)

会议地点: 北京

会议语种:英文

页码: 183-189

在线出版日期: 2014-10-12（万方平台首次上网日期，不代表论文的发表时间）