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首页> 外文会议>UMN annual geotechnical engineering conference >Vibratory and climatologically induced crack response: effects of uncracked weaknesses, low frequency excitation, period of vulnerability
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Vibratory and climatologically induced crack response: effects of uncracked weaknesses, low frequency excitation, period of vulnerability

机译：振动和气候引起的裂纹响应：无裂纹的弱点，低频激励和脆弱期的影响

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摘要

Cracking is a concern in structures adjacent to construction or blasting sites. Studies over the past decade show the insignificance of compliant-level ground motions relative to climatological effects, suggesting that there is a floor below which ground motions do not cause cracking. There are three alternative interpretations to these findings that are often raised. First, uncracked locations are more affected than cracked locations. Second, not enough cases of low-frequency, high-amplitude motions are documented. Third, a structure can become vulnerable to cosmetic cracking from small dynamic events. This paper sheds light on responses of uncracked weaknesses, high-amplitude, low-frequency motions and probabilities of small events during periods of vulnerability. Crack responses are compared in two structures. Uncracked weaknesses in drywall coverings did not respond differently to climatological or vibratory ground motions. Field measurements demonstrate that occupant-induced events are more likely than blast events to occur during the period of vulnerability or exposure.
机译：开裂是邻近建筑或爆破现场的结构中的一个问题。过去十年的研究表明，相对于气候影响，顺应性地面运动是微不足道的，这表明在地面以下，地面运动不会引起开裂。对于这些发现，通常有三种替代解释。首先，未破裂的位置比破裂的位置受到的影响更大。其次，没有记录到低频，高振幅运动的案例。第三，结构可能会因小动态事件而容易受到化妆品开裂的影响。本文阐明了脆弱时期未破裂的弱点，高振幅，低频运动和小事件的概率的响应。在两个结构中比较了裂纹响应。干墙覆盖层中未破裂的弱点对气候或振动的地面运动没有不同的反应。现场测量表明，在易受伤害或暴露期间，乘员诱发的事件比爆炸事件更可能发生。

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