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Response of reinforced concrete rectangular liquid containing structures under cyclic loading.

機(jī)譯：鋼筋混凝土矩形含液結(jié)構(gòu)在循環(huán)荷載作用下的響應(yīng)。

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摘要

The continual functioning of Liquid Containing Structures "LCS" is necessary for the well being of a society especially during and after an earthquake. One of the main parameters used in the seismic design of structures is the Response Modification Factor "R". For LCS, there has not been a justifiable guideline for determination of R factor and the empirical values have been implemented in the design of such structures. While the seismic design criteria for the buildings are mainly based on life safety and prevention of collapse, the concrete storage tanks should be designed to meet the serviceability limits such as leakage. This study was aimed at evaluation of the leakage behavior of ground supported open top rectangular RC tanks under the effect of cyclic loading. Full-scale specimens representing a cantilever wall were designed and built to simulate the leakage through the most critical region of the tank wall. A steel water pressure chamber was installed at the wall foundation connection to simulate the effect of the water pressure for the induced cracks at the critical location of the tank wall. Cyclic loading was applied on the top of the wall while the critical region of the wall was subjected to pressurized water. Different variables such as the thickness of the wall and the configuration of the shear key were examined. The effect of retrofitting the damaged specimen with Glass Fiber Reinforced Polymers (GFRP) sheets on the leakage behavior under cyclic loading was also investigated. Analytical studies using a Finite Element software were followed to assess the viability of the application of the FE analysis to the investigation of the cyclic behavior of the RC rectangular tanks. FE analysis results correlated well with the experimental observations. A study on the effect of R factor on the design loads was performed. Two major components of the R factor, namely, the ductility factor, and the overstrength factors were discussed and determined for the case of rectangular reinforced concrete LCS considering the leakage as the limit state. This study is limited to rectangular tanks in which the wall dimensions promote a one-way behavior.
機(jī)譯：液體容納結(jié)構(gòu)“ LCS”的持續(xù)運(yùn)行對(duì)于社會(huì)的福祉是必不可少的，尤其是在地震發(fā)生期間和之后。結(jié)構(gòu)抗震設(shè)計(jì)中使用的主要參數(shù)之一是響應(yīng)修正系數(shù)“ R”。對(duì)于LCS，沒(méi)有確定R因子的合理指南，并且在此類結(jié)構(gòu)的設(shè)計(jì)中已采用了經(jīng)驗(yàn)值。雖然建筑物的抗震設(shè)計(jì)標(biāo)準(zhǔn)主要是基于生命安全和防止倒塌，但混凝土儲(chǔ)罐的設(shè)計(jì)應(yīng)滿足諸如泄漏之類的使用壽命限制。這項(xiàng)研究的目的是評(píng)估循環(huán)荷載作用下地面支撐的敞開式矩形RC儲(chǔ)罐的泄漏行為。設(shè)計(jì)并構(gòu)建了代表懸臂壁的全尺寸標(biāo)本，以模擬通過(guò)罐壁最關(guān)鍵區(qū)域的泄漏。在墻基礎(chǔ)連接處安裝了一個(gè)鋼制水壓室，以模擬水壓對(duì)罐壁關(guān)鍵位置處引起的裂紋的影響。在壁的頂部施加循環(huán)載荷，同時(shí)對(duì)壁的關(guān)鍵區(qū)域施加加壓水。檢查了不同的變量，例如壁的厚度和剪切鍵的配置。還研究了使用玻璃纖維增??強(qiáng)聚合物（GFRP）板改造損壞的樣品對(duì)循環(huán)載荷下的泄漏行為的影響。隨后進(jìn)行了使用有限元軟件的分析研究，以評(píng)估將有限元分析應(yīng)用于RC矩形儲(chǔ)罐循環(huán)性能研究的可行性。有限元分析結(jié)果與實(shí)驗(yàn)觀察結(jié)果很好地相關(guān)。研究了R因子對(duì)設(shè)計(jì)載荷的影響。對(duì)于矩形鋼筋混凝土LCS，以泄漏為極限狀態(tài)，討論并確定了R因子的兩個(gè)主要組成部分，即延性因子和超強(qiáng)度因子。這項(xiàng)研究?jī)H限于矩形水箱，其中壁的尺寸促進(jìn)了單向行為。

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  • 作者

    Sadjadi, Reza.;

  • 作者單位

    Ryerson University (Canada).;

  • 授予單位 Ryerson University (Canada).;
  • 學(xué)科 Engineering Civil.
  • 學(xué)位 Ph.D.
  • 年度 2009
  • 頁(yè)碼 315 p.
  • 總頁(yè)數(shù) 315
  • 原文格式 PDF
  • 正文語(yǔ)種 eng
  • 中圖分類
  • 關(guān)鍵詞

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