山西盐湖Ms 4.4级地震出屋面构件震害分析
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山西省地震局

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TU362

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地震科技星火计划(XH19006Y);


Analysis of the roof parapets damage in the Ms 4.4 Yanhu Earthquake in Shanxi
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Earthquake Administration of Shanxi Province

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    摘要:

    以2016年3月12日山西盐湖Ms4.4级地震时出屋面的女儿墙、屋脊等非结构构件的震害为背景,介绍了村镇建筑中出屋面非结构构件的建造特征,分析了这类非结构构件破坏过程,提出了简化的分析模型,选取了32条4.0~5.0级地震下的强震动记录,对这类构件进行地震易脆性分析,结果表明,在地面峰值加速度为0.5g时,这类构件的倾覆概率可达80%,村镇建筑大多是1~2层建筑,其基本周期较短,地面地震动经短周期的结构放大后,位于建筑屋面的非结构构件会底部受的放大后楼面加速度激励,极容易发生破坏。虽然这类构件的造价不高,但是其位于屋面边缘,地震中时有砸伤地面行人的事件发生,建议进行合理加固改造。

    Abstract:

    Amounts of parapets on the building roof were collapsed during the Ms 4.4 Yanhu earthquake in Shanxi Province. The collapsed parapets hurtled the peoples on the ground lead to a relatively sever hazards compared to the same small magnitude earthquake. The characteristics of the parapets on the building roof was summarized and the simplified model was proposed based on the seismic damage. The unreinforced brick manometry parapets with a lower height could been taken as a rigid nonstructural component, which collapsed with two stages from the bottom mortar failure to the rocking. A set of 32 strong motion records during 4.0-5.0 earthquakes were selected, and the seismic fragility analysis of the simplified model carried out. The results showed that the overturning probability of the example model is 80% under the 0.5g peak ground acceleration excited building. Most of the buildings in villages are 1-2 stories with a relatively short fundamental period. The seismic dynamic response of the building with a short period may be amplified the acceleration and velocity, which may lead to a sever damage of the parapets on the building roof. It should be concerned and reinforced the parapets is located at the edge of the roof with a vulnerable fragility although the lower value of the nonstructural component

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王飞剑,杨斌,马朝晖. 山西盐湖Ms 4.4级地震出屋面构件震害分析[J]. 科学技术与工程, , ():

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  • 收稿日期:2020-09-15
  • 最后修改日期:2020-12-09
  • 录用日期:2020-12-21
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