【摘要】 太阳能热气流发电是实现大规模开发和利用太阳能的一种新途径。首先采用钢筋混凝土结构的强度分析方法,推导出平截面假定。在分别考虑自重和风荷载的情况下得到超高烟囱混凝土受压破坏状态方程。然后考虑荷载效应,选取钢筋混凝土材料的强度、容重以及标准风压作为基本随机变量和100 a为设计基准期。最后以1000 m超高烟囱为例,采用蒙特卡罗方法结合MATLAB编程计算出底部直径、壁厚、配筋率和混凝土强度对可靠度指标的影响。更多还原

【Abstract】 Solar chimney electricity is a brand-new way to realize large-scale utilization of solar energy.Firstly in this paper,the plane-section assumption equation of the chimney is applied according to the reinforced concrete strength theory,for the dead weight and the wind load are considered separately to deduce the concrete compressive failure equation.And the ultimate limit state function is established according to combination of these two load.Secondly the standard wind pressure,material strength and concrete density are selected as the main stochastic variables with a 100-year design lifetime.Finally MATLAB programs are set up to calculate a series of structure reliability of a 1000m-example chimney according to the Monte Carlo method,the influence of different bottom diameters,different wall thickness and different steel ratios are indicated.更多还原