THE OPTIMAL SELECTION METHOD OF SEISMIC STRENGTHING SCHEME FOR MASONARY BUILDINGS BASED ON COST-EFFECTIVE RATIO
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摘要: 综合考虑砌体结构层数、既有结构材料强度、震损程度、结构加固抗震能力提升及对应修复加固费用，建立了针对砌体结构的加固效费比模型。以砌体结构加固效费比模型为基础，兼顾施工工期、施工技术、耐久性和对使用功能影响等因素，结合理想点法建立了一套多目标的砌体结构抗震加固方案优选新方法。有针对性地分析了结构层数、既有材料强度、震损程度等因素对加固方案决策影响。结果表明：提出的优选方法能客观地反映既有结构基本信息对方案决策的影响；针对一般砌体加固工程，可结合主观意愿和客观条件，科学、高效地给出优选加固方案，为加固设计实施提供参考依据。Abstract: The model of efficiency-cost ratio for after-shock masonry strengthening is established, considering the number of stories, material strength, seismic damage, the promotion of seismic capacity, and the engineering cost. Based on the model, the optimal selection method for masonry strengthening is proposed, combining the Technique for Order Preference by Similarity to Ideal Solution (TOPSIS), including the construction time, technology, durability, and the impact on architectural function. Comparative cases are performed to study the influence on the optimal selection results by the number of stories, by the material strength, and by the seismic damage level. It is concluded that: the proposed method can reflect the influence on the strengthening decision making by the basic structural conditions, and effectively provide a scientific and reliable scheme for masonry buildings, combing the subjective and objective factors during the preliminary design stage.
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Keywords:
- masonry building /
- seismic strengthening /
- optimal selection /
- efficiency-cost ratio /
- TOPSIS method
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图 3 建立砌体结构加固效费比模型技术路线
Figure 3. The procedure of establishing the cost-effective ratio model for masonry buildings
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图 4 砌体结构加固前后抗震能力提升变参数计算
Figure 4. Parameter calculation on the seismic ability increasement of masonry building after strengthening
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图 7 震损情况对加固效费比影响
Figure 7. Influence on the strengthening cost-effective ratio by different seismic damaged levels
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图 8 基于效费比的砌体结构震损加固优选方法
Figure 8. Optimal selection method of strengthening scheme for seismic damaged masonry buildings based on cost-effective ratio
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图 9 不同楼层加固方案优选对比
Figure 9. Comparison of the optimal selection results for masonry buildings with different number of storey
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图 10 不同既有结构材料强度加固方案优选对比
Figure 10. Comparison of the optimal selection results for masonry buildings with different material strength
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图 11 不同砌体震损系数加固方案优选对比
Figure 11. Comparison of the optimal selection results for masonry buildings with different damaged level
表 1 加固与修复工程综合单价
Table 1 Comprehensive unit price of strengthening and repairment project
项目编号 单价/元 工程量 HB0044砌体加固/砌体裂缝压力灌浆/水泥聚合浆 1246 10 m HC0113墙加固/砖墙面包混凝土/中砂C25 6618 10 m3 HC0124砌体加固/水泥砂浆加固(35 mm厚) 323 10 m2 HC0123墙加固/聚合物水泥砂浆加固(35 mm厚) 1390 10 m2 
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表 2 优选验证算例输入参数
Table 2 Input parameters of the optimal selection calculation verification cases
加固方案 效费比 工期 施工技术 功能影响 耐久性 板墙加固 − 0.7 0.8 0.7 1.0 水泥砂浆面层 − 1.0 1.0 1.0 0.6 聚合物砂浆面层 − 0.9 0.9 1.0 0.9 权重系数 0.5 0.2 0.1 0.1 0.1 注：效费比值由加固效费比模型输出；施工技术包含“人员技术”、“材料供应”、“设备情况”、“环境影响”几个方面；工期、施工技术、功能影响和耐久性等指标及其权重系数由专家打分法结合实际情况得到[22]。
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