某装配整体式剪力墙结构住宅主体结构增量成本分析

Incremental Costs Analysis of Main Structure for a Residential Building with Assembled Integral Shear Wall Structure

为弄清装配整体式剪力墙结构住宅主体结构增量成本与装配式建筑等级之间的相互关系,基于广东省某实际工程案例,建立8个工况进行分析。分析结果表明:仅从经济性角度考虑,在叠合板差额还较大时,常规“三板”做法不是最佳主体结构实施形式,由于竖向预制构件得分率高于水平预制构件,适当采用竖向预制构件,有利于现阶段降低项目增量成本;增量成本随着装配式建筑评价等级提高而不断提升,A级至AA级增量成本提升最多,国标和省标增幅比例分别约为79%和43%;装配整体式剪力墙结构住宅项目在AA级和AAA级下国标的增量成本要比省标分别高约19.8%和29%,在基本级与A级下国标与省标的增量成本基本相同。

This paper researches the relationship between the incremental costs of main structure and the level of prefabricated building.Eight schemes are established for analysing based on a project at Guangdong Province.The results show that the conventional scheme called three boards method is not the best way for reducing costs of main structure from the view of economy.Because the scoring rate of vertical prefabricated components is higher than the scoring rate of horizontal prefabricated components.The vertical prefabricated components have positive influence on saving the incremental costs of the project.The incremental costs increase with the advancing level of prefabricated building,and the rate of incremental costs between A level and AA level is the fastest,the growth ratio of national standard and provincial standard is 79%and 43%,respectively.The incremental costs of the national standard is 19.8%and 29%higher than the provincial standard at the AA level and the AAA level,respectively.The incremental costs of the national standard is almost the same as that of the provincial standard at the basic level and the A level.