示刚架。
8、用位移法计算图
解：基本体系如图：
位移法方程：r11z1?R1P?0 3、作M1,MP图
r11、R1P、z1r10EI11?LR3 1P??16FP3F2zPL1?160EI5、作M图（略） 9、用位移法计算图示的刚架。
BCAD（1）?B?0，故?B??C?Z1，取基本体系 （2）列位移法方程：r11z1?R1P?0
4、求
（3）作M1,MP图
（4）
r511?16i,R1P??6
r9611z1?R1P?0,z1?5i（5）由M=M1z1+MP得
注：务必掌握例3-2、3-3、3-4、表3-1和3-2中的1、3、5、7、12以及对称结构的半结构的选取P58。
判断所示体系的动力自由度。
动力自由度为2。 动力自由度为1
一．求图示两跨连续梁的极限荷载。设两跨截面的极限弯矩均为Mu。 只有一个破坏机构，如图所示。 塑性铰D处的剪力为零。 对BD段：?M1B?0,2q2ux?2Mu?0,x?2Muq u对DC段：?MMC?0,qu?2u?l?x?2 求解上述两个方程有：x??2?2?l,qu?11.66Mul2 Visa-free policy brings Chengdu biz, tourism boost. Making national headlines several times, Chengdu's 72-hour visa-free policy has attracted wide attention from both Chinese and foreign experts and businessmen since it took effect on Sept 1 last including the United States, Australia, Canada and Japan who have valid visas and flight tickets to a third country to spend Sichuan province is the first city in the western region of China to offer foreign tourists a three-day visa and the fourth nationwide to adopt the policy following Shanghai, Beijing and Guangzhou. Li Zhiyong, deputy dean of the tourism institute at Sichuan University, said the move \number of overseas tourists and raises the city's level of internationalization\cultural legacies and is also a paradise for panda lovers with the world's largest breeding and research center. Three days are long enough for foreign visitors to visit those iconic tourist spots,\cheng Mountains and the Du jiang yan irrigation system. Qing cheng has long been recognized as the birthplace of Taoism, China's ancient indigenous religion, while Du jiang yan is considered to be the oldest functioning water-control project in the world. services among 60 Chinese cities in a customer satisfaction survey released last year.develop more tourism products, improve English services and provide accurate translation of traffic signs and scenic billboards. Zhao Yun, chairwoman of British Chamber of Commerce Southwest China, convenient. \British client once flew here and stayed for just one day to check her ordered goods,\province, but she has lived in Chengdu for more than 10 years. \before,\hometown,\72-hour visa-free policy and compelling conditions climate and cuisine, he said. Foreigners also gave positive feedback on the spokesman from Dell Inc said the company has a global hub of operation Chengdu, so the three-day visa \company's business development\Buttignol, president Canada, said his work requires frequent travel to Chengdu and the policy \public security bureau shows some 100 foreign visitors enjoyed the 72-hour policy by the end of March, most of them from the United States, the United Kingdom and Germany. Chengdu also reported robust growth in its overall tourist industry last year. Official statistics show that it received some 150 million tourists last year, an increase of 28 percent from 2012. Around 1.7 million came from abroad, an increase of 12 percent. Total revenue from tourism surpassed 133 billion yuan ($21.7billion). During his visit to Kazakhstan in September, Chinese hands to build a Silk Road economic belt to boost cooperation. The idea an encouraging blueprint for Chinese areas along the Silk Road that has three weeks, China Daily reporters will travel through the belt in China progress and expectations of the countries, businesses and peoples on the route. Shaanxi - the start of the ancient Silk Road - has positioned itself as the new citizens from 51 countries three days in the city. The capital of tourist facilities, management that his colleagues found the in British Columbia, year. The program permits and regions Chengdu ranked third in and But, Li added that efforts are still needed to told China Daily policy very in transportation, on the culture, policy. A in the of the public broadcasting company President Xi Jinping proposed that China and Central Asia join has been widely echoed in Central Asian countries, becoming linked Asia and Europe for more than 2,000 years. In the next and in Kazakhstan, Uzbekistan and Turkey. They will show the starting point for the development of the Silk Road Economic Belt, which will strengthen China's cooperation with Central Asian countries, a senior official said. Shaanxi Governor Lou Qinjian said the province is fresh, rich and unique, as it was when it anchored one end of the ancient Silk Road. \Lou held a joint interview with 27 media, including China Daily, the first in a series of interviews entitled Chinese Media Along the Silk Road. 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 Xi'an, the starting point of the ancient Silk Road, a trade channel established more than 2,000 years ago linking China, Central Asia and Europe.