(gad 杰地设计.浙江绿城建筑设计有限公司,杭州 310007)

摘要: 对规范中抗液化措施的适用性进行了讨论，指出了现有基于震陷量的抗液化研究的不足。提出了考虑场地液化等级、差异震陷引起的局部倾斜、建筑抗震设防类别的抗液化法，提出了局部倾斜控制值 Tk 。用有限元法分析了差异震陷对楼层侧移和构件内力的影响，结果表明，框架结构达到中等破坏对应的局部倾斜约 0.009 2，剪力墙结构达到中等破坏对应的局部倾斜约 0.007 7，与局部倾斜控制值较为吻合。介绍了抗液化法在某不均匀液化场地的工程应用，通过计算差异震陷，对不同楼栋采取了不同的抗液化措施，并对地基处理方案进行了比较和优化，弥补了规范关于不均匀液化场地选取抗液化措施的不足，可供其他项目参考。

关键词: 不均匀液化场地； 差异震陷； 局部倾斜； 抗液化设计

中图分类号:TU973+. 35 文献标志码:A 文章编号:1002-848X(2022)19-0060-06

DOI:10.19701 / j.jzjg.gad2204

Research and applications of anti-liquefaction design considering differentialseismic subsidence for uneven liquefaction site

ZHANG Ganglei,WU Yingdong,YE Anjie

(gad.Zhejiang Greenton Architectural Design Co. ,Ltd. ,Hangzhou 310007,China)

Abstract: The applicability of anti-liquefaction measures in codes was discussed,the deficiencies of existinganti-liquefaction study based on seismic subsidence was pointed out. An anti-liquefaction measure considering siteliquefaction grade,local tilt caused by differential seismic subsidence,seismic fortification category of buildings waspresented,and the controlled value of local tilt Tk was suggested. The influence of differential seismic subsidence on thedisplacement of floor and the internal force of components was analyzed by finite element method,the results show that thelocal tilt corresponding to the moderate failure of frame structure is about 0.009 2,the local tilt corresponding to themoderate failure of shear wall structure is about 0.007 7,which match the controlled value of local tilt roughly. Theengineering application of anti-liquefaction method in an uneven liquefaction site was introduced,different anti-liquefactionmeasures were taken in different buildings by calculating differential seismic subsidence,foundation treatment schemes werecompared and optimized. It makes up for the deficiencies in the specification regarding the selection of anti-liquefactionmeasures for uneven liquefaction sites,and can be used as a reference for other projects.

Keywords:uneven liquefaction site； differential seismic subsidence； local tilt； anti-liquefaction design

第一作者:章钢雷，硕士，高级工程师，主要从事建筑结构设计工作，Email:446725125@ qq. com。

[引用本文] 章钢雷，吴映栋，叶安杰. 不均匀液化场地考虑差异震陷的抗液化设计研究和应用[ J]. 建筑结构，2022，52( 19):60-65. ZHANG Ganglei，WU Yingdong，YE Anjie. Research and applications of anti-liquefaction designconsidering differential seismic subsidence for uneven liquefaction site[J]. Building Structure，2022，52(19):60-65.