The rib verse is as follows:
1, Xuanhe Jin Shu is a minister with smooth and hard bones and muscles. -Excerpted from Xun's "The Eight Immortals Song in Drinking Old Books by Wang Yi"
2. The strength of tendons decreases year by year, and the scenery grows day by day. —— Excerpted from Tang Juyi's "Late Return and Early Leave"
3. Although the tendons and veins are immature, they have not suffered. -Excerpted from Two Poems by Don Bai Juyi.
4. Generations get together and sleep alone. -Excerpt from Tang Xueneng's Night Shift
5, the snake tendons are tight and broken, and the cold turtle is a taste. -Excerpted from Tang Lutong's Poems of Eclipse.
6, now old and weak, still rely on the camp door to count geese. -Excerpt from the Travel Notes of Four Boys by Tang Linghu Chu.
7, eating exhausted, sweaters turn purple. -from Tang Yuanzhen's Ten Summer Poems.
8, chasing Jin Huan is different, looking at the same age. -Excerpted from Tang Du Fu's Nine Days in Zizhou City
9. The west wind should be strong in time and the dew should be cold. -Excerpted from Tang Baorong's "The Plug"
The compressive failure of unreinforced masonry can be divided into the following three stages:
The first stage: from the compression of masonry to the crack of single brick. When the first crack appears, the load is about 50% ~ 70% of the failure load. At this time, if the load does not increase, the crack will not continue to expand.
The second stage: with the increasing load, the original cracks are expanding and new cracks are produced, which form continuous cracks (strips) vertically through several leather bricks. At this time, even if the load does not increase, the crack will continue to develop, and its load is about 80% ~ 90% of the failure load.
The third stage: when the load increases, the cracks develop rapidly. Several continuous vertical cracks divide the masonry into half brick columns, and the whole masonry is obviously protruding. Finally, the masonry lost its bearing capacity and was destroyed.