In-plane shear and tensile strength tests of small brickwork specimens
In-plane shear and tensile strength tests of small brickwork specimens
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小砖砌体试样的面内剪切和拉伸强度测试
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发表时间：
2016
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通讯作者：
L.
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作者：
L.
在单调力控制下，对试样尺寸的砌体板（尺寸大多为520 × 520 × 120 mm）进行了几次强度试验，以获得砌体墙面内响应的信息。所有试件均由抛光标准粘土砖（250 × 120 × 65 mm）和1：0.5：4.5波特兰水泥-石灰砂浆制成。通过标准三重试验和预先确定的单剪切面试验研究了直剪响应。在后一种试验中，不需要为了预测初始抗剪强度而测量多个预压水平处的强度。还进行了垂直于底缝的单剪切面试验。采用斜压试验来模拟与斜裂缝有关的面内剪切现象。对10块砌体板进行了试验，以获取破坏模式和劈裂强度。此外，砖和砂浆的各种强度特性进行了研究。文中还讨论了有关的强度准则。对于试验数据，给出了剪-预压应力状态下的最简形式准则。区分了三种基本破坏模式：沿着底缝剪切滑移、斜拉开裂和剪压破坏。文中还对如何利用三重压缩和斜压试验的强度参数提出了一些看法。
Under monotonic force control several strength tests were performed on coupon-size masonry panels (dimensions mostly 520 x 520 x 120 mm) in order to get information on the in-plane response ofbrickwork walls. Ali specimens were made up ofpolish standard clay bricks (250 x 120 x 65mm) and a 1:0.5:4.5 portland cement-lime mortar. The response to direct shear was investigated by means ofboth the standard triplet test and the test with the predetermined single plane of the shear failure. In the latter test there is not need to measure the strength at a number of the precompression leveis in order to predict the initial shear strength. Tests with the single shear plane normal to the bed joints were also performed. The diagonal compression test has been chosen to simulate in-plane shear phenomenon related to the diagonal cracking. The test was carried out on ten masonry panels capturing the failure modes and the splitting strength. Additionally, the various strength characteristics of bricks and mortar were investigated. The strength cri teria related are also discussed. For the experimental data the simplest form of the cri teria are presented in the shear-precompression stress state. The three basic failure modes are distinguished: shear slip along the bed joints, diagonal tension cracking and shear compression fai lure. Some remarks on taking advantage of the strength parameters from triplet and diagonal compression tests are also given.