弱碱性砂垫层在村镇建筑中的地震响应研究  

THE SEISMIC RESPONSE OF WEAKLY ALKALINE SAND CUSHION IN RURAL AND TOWN BUILDINGS

作　　者：沈登绪 马晓涛 SHEN Dengxu;MA Xiaotao(Lankao Agricultural Vocational College,Henan Lankao 475300,China)

机构地区：[1]兰考三农职业学院,河南兰考475300

出　　处：《低温建筑技术》2025年第3期70-74,79,共6页Low Temperature Architecture Technology

基　　金：开封市科技发展计划软科学研究项目(2404062)。

摘　　要：为降低农村房屋的地震灾害风险,文中基于砂垫层隔震技术,探讨豫东黄泛区弱碱性砂土在村镇隔震建筑中的地震响应。在试验研究基础上分析弱碱性砂土的力学性能,运用ABAQUS有限元分析软件,对两层典型村镇隔震建筑进行抗震数值模拟,通过改变弱碱性砂垫层厚度、摩擦系数、密实度等参数,对比有无隔震工况下结构的底部剪力、顶层加速度响应。结果表明弱碱性砂垫层隔震结构相比于传统抗震结构自振周期延长了15.8%,在摩擦系数为0.2时,结构底部剪力减小率为56.8%,顶层加速度减小率为41.3%,摩擦系数对结构地震响应影响最大,密实度对结构地震响应影响相对较弱。研究可为黄泛区弱碱性砂土在村镇隔震建筑中的应用提供参考借鉴。This study explores the seismic response of weakly alkaline sand in the Yellow River floodplain of eastern Henan when used in village and town base-isolated buildings by the sand cushion isolation technique to reduce the seismic disaster risk of rural houses.The mechanical properties of weakly alkaline sand are analyzed by using the ABAQUS finite element analysis software,in which a seismic numerical simulation is conducted on a two-story typical village and town base-isolated building.By varying the thickness,friction coefficient,and compactness of the weakly alkaline sand cushion,the bottom shear force and top-floor acceleration response of the structure are compared between base-isolated and non-isolated conditions.The results show that,compared with traditional seismic structures,the fundamental vibration period of the base-isolated structure with a weakly alkaline sand cushion is extended by 15.8%.When the friction coefficient is 0.2,the reduction rate of bottom shear force reaches 56.8%,and the reduction rate of top-floor acceleration is 41.3%.The friction coefficient has the greatest influence on the seismic response of the structure,while the compactness has a relatively weaker effect.This study may provide the reference for the application of weakly alkaline sand in village and town base-isolated buildings in the Yellow River floodplain.

关 键 词：弱碱性砂土 隔震结构 摩擦系数 

分 类 号：TU353.12[建筑科学—结构工程]