《Earthquake Engineering and Structural Dynamics》杂志刊登“使用结构优化的钢筋混凝土框架和高强水泥基复合材料框架的生命周期成本评估”

作者：Bora Gencturk

刊物：《Earthquake Engineering and Structural Dynamics》，2013年，42卷第1期，61—79页

关键词：生命周期成本；高强水泥基复合材料；结构优化；非弹性动力分析；禁忌搜索；频谱匹配

摘要：本文对框架结构生命周期成本的评估进行了研究。并将具有不同的响应特性的钢筋混凝土材料和钢筋高强水泥基复合材料来构建框架模型。其与传统的混凝土材料相比，高强水泥基复合材料具有高强度延伸性、吸能效果好和裂缝宽度小等优点。然而，这种材料比传统的混凝土材料要昂贵；所以，为了量化用高强水泥基复合材料替代混凝土材料的潜在效益，本文对优化的框架结构进行全生命周期性能的评估。三种不同框架分别为：钢筋混凝土框架、高强水泥基复合材料框架和多介质材料框架。这种多介质材料是指在有塑性铰可能出现的地方使用高强水泥基复合材料，而其余的地方使用廉价的钢筋混凝土材料。利用混凝土和高强水泥基复合材料的不同性能，采用严格的分析方法对结构性能和抗震要求进行评估，并且将偶然性和不确定性因素也并入到生命周期成本评估中去。应用原始方法和生命周期成本法计算框架造价。结果表明：由于节省了材料和人工绑扎钢筋费，应用高强水泥基复合材料是最低的，并且由于性能增强而减少了后期的改造费用。

Life-cycle cost assessment of RC and ECC frames using structural optimization

Authors: Bora Gencturk

Journal: Earthquake Engineering and Structural Dynamics, Volume 42, Issue 1, pages 61–79, January 2013

Key words: life-cycle cost; ECC; structural optimization; inelastic dynamic analysis; Tabu search; spectrum-matching

Abstract: In this study life-cycle cost (LCC) assessment of structural frames is performed. Two different materials, reinforced concrete (RC) and reinforced engineered cementitious composites (ECC), with different response characteristics are used to model the frames. ECC is characterized by high tensile ductility and energy absorption and reduced crack widths when compared to conventional concrete. However, the material is more expensive than conventional concrete; therefore, in order to quantify the potential benefits that could be obtained by replacing concrete with ECC, the life-cycle performance is evaluated in an optimization framework. Three different structural frames are considered: an RC only frame, an ECC only frame and a multi-material (MX) frame in which ECC is selectively applied at the potential plastic hinge locations while the remainder of the frame is made of RC. The structural capacity and earthquake demand are evaluated using rigorous analysis methods to capitalize on different characteristics of concrete and ECC, and both aleatory and epistemic uncertainties are incorporated into the LCC formulation. It is found that both the initial and LCC of frames that use ECC are lower due to savings in material and labor cost of transverse reinforcement for the former and due to increased capacity and reduced demand for the latter. 

原文链接：http://onlinelibrary.wiley.com/doi/10.1002/eqe.2193/abstract