云南漾濞6.4级地震木构架房屋震害调查与分析

地震灾害现场调查是研究结构破坏机理的科学可靠的方法之一。本文通过对云南漾濞6.4级地震中木构架房屋震害现象调查与分析，结合芦山地震中穿斗木结构的震害特征对比研究，给出了木构架房屋的抗震能力介于穿斗木结构与土木结构之间的初步结论，同时指出建造时间是木构架房屋抗震能力评估时需考虑的重要影响因素。针对漾濞县苍山西镇花椒园村背阴坡小组某夯土墙-木构架房屋倒塌的原因进行了分析，得出该房屋存在结构层间刚度不均匀、榫槽处柱截面削弱以及榫卯节点整体性差等抗震薄弱环节，导致在强地面运动的作用下发生了柱榫槽处折断和部分榫头脱落的整体倒塌震害现象。本文基于对倒塌木构架房屋的震害机理研究和抗震薄弱环节识别，可为木结构房屋抗震加固和震后修复提供参考依据。

Investigation and analysis of seismic damage of timber framed dwelling in Yunnan Yangbi M6.4 earthquake

Field investigation on earthquake disaster is one of the scientific and reliable methods to study the mechanism of structural failure. Based on the investigation and analysis of the earthquake damage phenomenon of timber-framed dwelling in the M6.4 earthquake in Yangbi, Yunnan, combined with the comparative study of the seismic damage characteristics of Chuan-Dou type timber structures in the Lushan earthquake, preliminary conclusions were drawn that the seismic capacity of timber-framed houses is between that of Chuan-Dou type timber structures and that of the Adobe-Timber structures in the Lushan earthquake, and the construction time should be taken into account as the important influencing factor in the seismic capacity evaluation of timber-framed houses. Typically, the reason for the collapse of a rammed-earth wall-timber frame house in Beiyinpo Group,Huajiaoyuan Village, West Cangshan Town, Yangbi County was analyzed, and it was concluded that uneven structural stiffness between layers, weakened column cross-sections at the tongue and groove, and poor integrity of the mortise-and-tenon joints caused the earthquake damage of the column tongue and groove broken and part of the tongue falling off under the action of strong ground motion. This study of the earthquake damage mechanism of collapsed timber-framed houses and the identification of weak links in earthquake resistance in this paper can provide a reference for seismic reinforcement and post-earthquake restoration.