本文選題：鋼筋混凝土(RC)　切入點(diǎn)：高墩　出處：《同濟(jì)大學(xué)學(xué)報(bào)(自然科學(xué)版)》2015年09期

【摘要】：對(duì)4個(gè)鋼筋混凝土箱形高墩模型開(kāi)展了擬靜力試驗(yàn)研究,并重點(diǎn)研究結(jié)構(gòu)在不同損傷狀態(tài)下的性能及相應(yīng)的變形指標(biāo).采用夾式引伸計(jì)監(jiān)測(cè)了裂縫開(kāi)展全過(guò)程,指出采用卸載至位移零點(diǎn)時(shí)的裂縫寬度會(huì)嚴(yán)重低估結(jié)構(gòu)的殘余裂縫損傷,同時(shí)允許震后結(jié)構(gòu)產(chǎn)生不需要修復(fù)的殘余裂縫比完全基于彈性響應(yīng)可以多出10%~30%的強(qiáng)度折減空間.試驗(yàn)中還觀測(cè)了混凝土壓潰、嚴(yán)重剝落等損傷,并基于美國(guó)太平洋地震工程中心(PEER)數(shù)據(jù)庫(kù)等相關(guān)試驗(yàn)結(jié)果進(jìn)行了對(duì)比驗(yàn)證,結(jié)果表明發(fā)生混凝土壓潰時(shí)的各樣本墩頂偏移率分布較為集中,約為2.39%,試驗(yàn)結(jié)果與樣本統(tǒng)計(jì)結(jié)果符合較好.各試件的最終破壞均表現(xiàn)為縱筋斷裂,分別采用Priestley和Berry的等效塑性鉸長(zhǎng)度計(jì)算公式進(jìn)行了對(duì)比,結(jié)果表明Berry公式對(duì)高墩極限位移的符合性相對(duì)較好.
[Abstract]:The pseudostatic test of four reinforced concrete box high pier models was carried out, and the performance of the structure under different damage conditions and the corresponding deformation indexes were studied. The whole process of crack development was monitored by means of a clamping extensometer. It is pointed out that the crack width when unloading to the zero of displacement will seriously underestimate the residual crack damage of the structure. At the same time, the residual cracks that do not need to be repaired in the post-earthquake structure are allowed to produce 10% more room for strength reduction than are completely based on the elastic response. Damage such as concrete crashing, severe spalling and so on have been observed during the test. The results are compared and verified based on the PEER-database of the Pacific Seismic Engineering Center of the United States. The results show that the migration rate distribution of each sample pier is concentrated when the concrete collapses occur. The test results agree well with the statistical results of the sample. The ultimate failure of each specimen is longitudinal bar fracture. The equivalent plastic hinge length formula of Priestley and Berry is used to calculate the length of the equivalent plastic hinge. The results show that the Berry formula has better conformance to the limit displacement of high pier.
【作者單位】： 同濟(jì)大學(xué)土木防災(zāi)國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家“九七三”重點(diǎn)基礎(chǔ)研究發(fā)展規(guī)劃(2013CB036302) 國(guó)家自然科學(xué)基金(51378384) 中央高�；究蒲袠I(yè)務(wù)費(fèi)專項(xiàng)資金(20113184)
【分類號(hào)】：U442.55

【參考文獻(xiàn)】

相關(guān)期刊論文 前2條

1 李建中,宋曉東,范立礎(chǔ);橋梁高墩位移延性能力的探討[J];地震工程與工程振動(dòng);2005年01期

2 黃顯彬;楊虹;恩文海;梁健;莫憂;;都汶高速公路廟子坪岷江特大橋震后5號(hào)主墩加固技術(shù)[J];建筑技術(shù);2010年02期

【共引文獻(xiàn)】

相關(guān)期刊論文 前10條

1 楊萬(wàn)理;李喬;;深水橋墩流固耦合下的自振特性研究[J];四川建筑科學(xué)研究;2012年03期

2 梁智W，

本文編號(hào)：1657546