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The interviews will be in Shaanxi and Gansu provinces and the Xinjiang Uygur autonomous region, as well as Kazakhstan, Uzbekistan and Turkey.The media group held the first interview on Wednesday morning in Xi39。 參考答案: 典型方程 Visafree policy brings Chengdu biz, tourism boost. Making national headlines several times, Chengdu39。 作后彎矩圖如圖(f)所示。 參考答案: 利用對稱性結(jié)構(gòu)簡化為如圖(a)所示。EI=常數(shù)。( ) (a) (b)36.圖(a)對稱結(jié)構(gòu)利用對稱性可簡化為圖(b)來計算。 ( √ )28.力矩分配法適用于所有超靜定結(jié)構(gòu)的計算。 ( ),虛設(shè)力狀態(tài)可以在力法的基本結(jié)構(gòu)上設(shè)。( √?。?2.靜定多跨梁中基本部分、附屬部分的劃分與所承受的荷載無關(guān)。 ( )4.圖示梁AB在所示荷載作用下A截面的彎矩值為。A.2 B.4 C.6 D.827.超靜定結(jié)構(gòu)在荷載作用下產(chǎn)生的內(nèi)力與剛度( B )A. 無關(guān) B. 相對值有關(guān) C. 絕對值有關(guān) D. 相對值絕對值都有關(guān)28.超靜定結(jié)構(gòu)的超靜定次數(shù)等于結(jié)構(gòu)中(B )A.約束的數(shù)目 B.多余約束的數(shù)目C.結(jié)點(diǎn)數(shù) D.桿件數(shù)29. 用位移法計算超靜定結(jié)構(gòu),其基本未知量的數(shù)目等于( D )A.超靜定次數(shù) B.剛結(jié)點(diǎn)數(shù)目C.線位移數(shù)目 D.獨(dú)立的結(jié)點(diǎn)位移數(shù)目30.位移法典型方程的物理意義是( A )A.附加約束上的平衡方程 B.附加約束上的位移條件C.外力與內(nèi)力的關(guān)系 D.反力互等定理31. 用位移法解超靜定結(jié)構(gòu)其基本未知量的數(shù)目( A )A.與結(jié)構(gòu)所受的作用有關(guān) B.與多余約束的數(shù)目有關(guān)C.與結(jié)點(diǎn)數(shù)有關(guān) D.與桿件數(shù)有關(guān)32.圖示超靜定結(jié)構(gòu)獨(dú)立結(jié)點(diǎn)角位移的個數(shù)是( B )A. 2 B. 3 C. 4 D. 533.用位移法計算圖示各結(jié)構(gòu),基本未知量是兩個的結(jié)構(gòu)為( C?。?。A.固定荷載的位置 B.移動荷載的位置C.截面的位置 D.單位移動荷載的位置11. 靜定結(jié)構(gòu)內(nèi)力與反力影響線的形狀特征是( A )。質(zhì)量集中在橫梁上,不考慮桿件的軸向變形,則體系振動的自由度數(shù)為(A ) A.1 B.2 ( A )A.1 B.2C. 3 D.419.不考慮桿件的軸向變形,下圖所示體系的振動自由度為(A )。A.結(jié)構(gòu)的平衡條件 B.結(jié)構(gòu)的物理條件 C.多余約束處的位移協(xié)調(diào)條件 D.同時滿足A、B兩個條件37.力法典型方程中的系數(shù)代表基本結(jié)構(gòu)在( C)。( )7.圖示桁架結(jié)構(gòu)中不包括支座鏈桿,有5個桿件軸力為0 。 ( √ )15.一般來說靜定多跨梁的計算順序是,先基本部分后附屬部分。(√ )23.用位移法解超靜定結(jié)構(gòu)時,附加剛臂上的反力矩是利用結(jié)點(diǎn)平衡求得的。 ( )31.圖示結(jié)構(gòu)A截面彎矩影響線在A處的豎標(biāo)為l。( )39.結(jié)構(gòu)的自振頻率與結(jié)構(gòu)中某桿件的剛度無關(guān)。 參考答案: 基本體系及未知量如圖(a)所示。 (a) (b) (c)力法解圖示結(jié)構(gòu),并作彎矩圖。EI=常數(shù)。s largest breeding and research center. Three days are long enough for foreign visitors to visit those iconic tourist spots, he noted. The city is home to the