地震研究

基于地震损失风险的建筑业态组合方案的优化设计方法

王健泽¹,查军龙¹,戴靠山^1,2,3,廖光明¹

(1.四川大学土木工程系,四川成都 610065; 2.深地科学与工程教育部重点实验室,四川成都 610065; 3.破坏力学与工程防灾减灾四川省重点实验室,四川成都 610065)

Optimal Architectural Design of Commercial Buildings Based on Seismic Loss Risk

WANG Jianze¹,ZHA Junlong¹,DAI Kaoshan^1,2,3,LIAO Guangming¹

(1.Department of Civil Engineering,Sichuan University,Chengdu 610065,Sichuan,China)(2.Key Laboratory of Deep Earth Science and Engineering(Sichuan University),Ministry of Education,Chengdu 610065,Sichuan,China)(3.Failure Mechanics & Engineering Disaster Prevention and Mitigation,Key Laboratory of Sichuan Province,Chengdu 610065,Sichuan,China)

Keywords：seismic losses; architectural function combination; commercial buildings; the generic algorithm; risk of the structure's collapse

DOI: 10.20015/j.cnki.ISSN1000-0666.2022.0064

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参考文献

以一座9层钢支撑框架结构作为研究对象,采用新一代基于性能的抗震评价理论对其进行了地震损失风险分析,讨论了由商业办公、零售、酒店公寓3种不同主流业态的7个建筑组合方案的地震损失差异。同时,基于遗传算法提出考虑地震损失风险和决策者主观意愿的最优业态组合决策方法。结果表明:该建筑结构的倒塌风险较低,50年内倒塌概率约为0.64%。选择不同业态组合方案明显影响建筑地震损失,最大相对损失差距约为20%。

Currently,most attentions was devoted to assessing seismic losses for newly-built or existing building structures with certain structural design schemes.Few studies were performed to take the seismic-loss estimation into account the architectural design of buildings especially for the architectural function arrangement.In this study,a nine-story,concentrically-braced frame structure was focused.The new generation of performance-based earthquake engineering theory was used to estimate seismic-loss risks.The differences in seismic-loss results for the considered seven building functional schemes that consist of commercial office,retail and apartment were discussed.Subsequently,an optimal decision approach based on the genetic algorithm was developed for determining architectural functions of buildings involving seismic-loss risk and the decision-maker's initiative.The results show that the risk of the structure's collapse in 50 years is as low as 0.64%.The selection of architectural function scheme of buildings has considerable effects on the economic losses under the seismic action.The largest relative difference can be up to 20%.

引言
1 评估方法
2 典型商业建筑结构分析
3 考虑业态组合的损失分析
4 基于遗传算法的最优业态组合决策方法
5 结论

图1 9层支撑框架结构模型<br/>Fig.1 The schematic views of the nine-story,braced-frame building

图1 9层支撑框架结构模型
Fig.1 The schematic views of the nine-story,braced-frame building

图2 地震危险性曲线<br/>Fig.2 The seismic hazard curve

图2 地震危险性曲线
Fig.2 The seismic hazard curve

图3 本文研究选取的22组地震动反应谱及均值<br/>Fig.3 Twenty-two groups of the ground motion response spectra

图3 本文研究选取的22组地震动反应谱及均值
Fig.3 Twenty-two groups of the ground motion response spectra

表1 地震动调幅情况<br/>Tab.1 The amplitude modulation of ground motion

表1 地震动调幅情况
Tab.1 The amplitude modulation of ground motion

图4 22条地震波层间位移角(a)、楼层峰值加速度(b)及残余层间位移角(c)随地震动强度变化分布及均值<br/>Fig.4 The variations of the story drift ratio(a),the peak floor acceleration(b)and the residual story drift(c)of 22 earthquake waves with increase of the seismic intensity and their mean values

图4 22条地震波层间位移角(a)、楼层峰值加速度(b)及残余层间位移角(c)随地震动强度变化分布及均值
Fig.4 The variations of the story drift ratio(a),the peak floor acceleration(b)and the residual story drift(c)of 22 earthquake waves with increase of the seismic intensity and their mean values