Full-scale experiment on reinforced Taiwanese traditional timber frames
Full-scale experiment on reinforced Taiwanese traditional timber frames
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发表时间：
2010-12
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通讯作者：
Wen-shao Chang;M. Hsu
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作者：
Wen-shao Chang;M. Hsu
摘要：许多传统的木结构建筑在1999年的大地震中遭到破坏。震后调查表明，梁柱连接会影响整个木框架的破坏模式，有些连接类型会导致木框架的倒塌。实地调查显示，台湾有许多传统的木结构因抗震能力不足而容易受到地震的影响。因此，台湾迫切需要提出一种方法来加强这些传统木结构的抗震能力。在这项研究中，首先制作了三个足尺试件并进行了测试。在循环荷载作用下，得到试件的滞回曲线。试验结束后，将其中一个试件拉回其原始位置，并重新粉刷开裂的泥浆剪力墙。另一个试件通过在木质剪力墙中插入坚硬的木条，在梁柱连接中插入软木钉子进行加固。对加固后的木结构和未加固的木结构的性能进行了对比。结果表明，加固后试件的强度明显低于试验前，加固后的试件可以恢复强度。还进行了静力推覆分析，以分析符合可接受协议的非加筋木结构的性能。
ABSTRACT: Many traditional timber structures were destroyed by the major earthquakes of 1999. The post earthquake survey showed the beam-to-column connections will affect the failure mode of the entire timber frame, some connection types leaded to collapse of the timber frame. The field survey indicates that there exist many traditional timber frames in Taiwan that are vulnerable to the earthquake due to insufficient seismic resistance. Hence there is an urgent need in Taiwan to propose a method to reinforce the seismic capacity of these traditional timber frames. In this study, three full-scale specimens were firstly fabricated and tested. Cyclic loading was applied to obtain the hysteretic loop of the specimens. After the test, one of the specimens was pulled back to its origin position and the cracked mud shear wall was replastered. Another specimen was reinforced by inserting hard wood strips into wood shear walls and softwood pegs into beam-column connections. The results of performance of reinforced timber frame were compared with that of unreinforced timber frame. It appears that the replastered specimen show significant lower strength than that before test, and reinforced specimen can recover the strength. Static push-over analyses were also carried out to analyze performance of unreinforced timber structures with acceptable agreements.