The aim of this paper is to identify, both through microtremor analysis and visual inspection, the collapse mechanisms of the Nepalese wood‐masonry monuments damaged by the 2015 seismic event that struck Kathmandu and its valley. The research analyses two case studies as the “Radha Krishna” temple located in Teku, a district in Kathmandu, and the “Pancha Deval complex” in Pashupati area. More specifically, after a careful anamnesis based on visual inspection and hypotheses on the temple's structural behaviour, global nondestructive testing (microtremor) was carried out for qualitative characterization of the structural system. The visual damage survey allowed to identify the recurring collapse mechanisms in the two case studies with the identification of typical Nepali expected damage. The case of Radha Krishna temple denotes a Nepali collapse mechanism typical in the corner of temples made of timber masonry, in which the mechanical contribution of the timber is manifested through columns and windows. The ambient vibration analysis carried out by tromograph device and microtremor evaluation allowed to dynamically characterize the two bases by identifying the peak frequencies both for Radha Krishna and for Pancha Deval complex. With the same device, the two historic constructions have been also studied in evaluating local modes and frequency. In the Pancha Deval complex, a relationship between damage, frequencies, and the amplification of the base was observed. In detail, the five buildings have similar damage and similar first frequencies (2.72–2.9 Hz). The most damaged sides are those with the frequencies close to the base (2.05–2.38 Hz).

中文翻译：

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通过环境振动分析和目视检查评估尼泊尔遗产的破坏

本文的目的是通过微震分析和目测检查，确定2015年加德满都及其山谷遭受地震破坏的尼泊尔砌体古迹的倒塌机制。该研究分析了两个案例研究：位于加德满都地区特库的“ Radha Krishna”神庙和位于Pashupati地区的“ Pancha Deval建筑群”。更具体地说，在根据目视检查和关于神庙结构行为的假设进行仔细的记忆检查后，进行了整体非破坏性测试（微震），以对结构系统进行定性表征。视觉损伤调查可以确定两个案例研究中的反复坍塌机制，并确定典型的尼泊尔预期损伤。拉达·克里希纳（Radha Krishna）庙宇的案例代表尼泊尔的一种坍塌机制，通常发生在用砖石砌成的庙宇的拐角处，其中，木材的机械作用通过圆柱和窗户得以体现。通过记录仪设备进行的环境振动分析和微震评估，可以通过识别Radha Krishna和Pancha Deval复合体的峰值频率来动态表征两个碱基。使用同一设备，还研究了两种历史构造来评估本地模式和频率。在Pancha Deval建筑群中，观察到了破坏，频率和碱基扩增之间的关系。详细地，这五座建筑物具有相似的损坏和相似的第一频率（2.72-2.9 Hz）。损坏最多的一面是那些频率接近基频的那一面（2。