This paper deals with new and innovative case studies of application of post-tensioning for restoration of structures for buildings, bridges and rock stabilization in India. In earlier situations for these types of ca...This paper deals with new and innovative case studies of application of post-tensioning for restoration of structures for buildings, bridges and rock stabilization in India. In earlier situations for these types of cases conventional method of repair and rehabilitation has been used. These innovative approaches for restoration have led to enormous saving of cost and time. The advantages of post tensioning are well known in the civil industry and are being used for the last 40 to 50 years. Post tensioning is one of the best methods to induce stresses in the concrete before application of live load and this technique can also be widely used for restoration and rehabilitation of structures. Unlike the use of post-tensioning in new structures there are no definite methods or codes for application in restoration and rehabilitation of structures. For restoration and rehabilitation of structures, PT （post tensioned） technique can be applied in combination with other techniques and materials available. Bridge lifting is a tricky and risky job especially when the superstructure is displaced appreciably by a natural calamity, etc.. Not only the present state of structure needs proper study before commencement of restoration and rehabilitation but also calls for careful execution. This paper deals with case studies of innovative applications of post tensioning in restoration and rehabilitation of structures and restoration of bridge structure in Andaman ＆ Nicobar Island, India affected by Sumatra quake.展开更多
Whether rapid real estate investment growth inhibits China's innovation is a critical question for China's economic sustainability. Based on China's provincial panel data and using land supply as an instru...Whether rapid real estate investment growth inhibits China's innovation is a critical question for China's economic sustainability. Based on China's provincial panel data and using land supply as an instrumental variable for real estate investment growth, we arrived at the following findings after effectively controlling endogenous factors that could lead to estimation errors. First of all, the faster real estate investment grows in a province, the lower the growth rates of innovation and R&D spending and invention patent authorizations will be in the province, an indication that real estate directly inhibits innovation in China. Such inhibition is particularly pronounced in the industrial sectors. Secondly, in the context of rampant real estate investment, the biased loan maturity structure of China's financial system in favor of the real estate industry further inhibits innovation. This paper has verified the existence of the direct effect of real estate investment growth on regional innovation and its indirect effect on regional innovation through the biased long maturity structure of the financial system. The empirical findings of this paper provide practical policy implications for China to strike a balance between real estate development and an innovation-driven development strategy.展开更多
文摘This paper deals with new and innovative case studies of application of post-tensioning for restoration of structures for buildings, bridges and rock stabilization in India. In earlier situations for these types of cases conventional method of repair and rehabilitation has been used. These innovative approaches for restoration have led to enormous saving of cost and time. The advantages of post tensioning are well known in the civil industry and are being used for the last 40 to 50 years. Post tensioning is one of the best methods to induce stresses in the concrete before application of live load and this technique can also be widely used for restoration and rehabilitation of structures. Unlike the use of post-tensioning in new structures there are no definite methods or codes for application in restoration and rehabilitation of structures. For restoration and rehabilitation of structures, PT （post tensioned） technique can be applied in combination with other techniques and materials available. Bridge lifting is a tricky and risky job especially when the superstructure is displaced appreciably by a natural calamity, etc.. Not only the present state of structure needs proper study before commencement of restoration and rehabilitation but also calls for careful execution. This paper deals with case studies of innovative applications of post tensioning in restoration and rehabilitation of structures and restoration of bridge structure in Andaman ＆ Nicobar Island, India affected by Sumatra quake.
基金the sponsorship of the Ministry of Education Program“Navigating the New Normal”Scientific Research Foundation of the Renmin University of China“A Study on Limited Catch Up and Transition of China's Trade Pattern:A New Theory Based on Global Trade Scale and Interest Disequilibrium(Grant No.12XNI010)”
文摘Whether rapid real estate investment growth inhibits China's innovation is a critical question for China's economic sustainability. Based on China's provincial panel data and using land supply as an instrumental variable for real estate investment growth, we arrived at the following findings after effectively controlling endogenous factors that could lead to estimation errors. First of all, the faster real estate investment grows in a province, the lower the growth rates of innovation and R&D spending and invention patent authorizations will be in the province, an indication that real estate directly inhibits innovation in China. Such inhibition is particularly pronounced in the industrial sectors. Secondly, in the context of rampant real estate investment, the biased loan maturity structure of China's financial system in favor of the real estate industry further inhibits innovation. This paper has verified the existence of the direct effect of real estate investment growth on regional innovation and its indirect effect on regional innovation through the biased long maturity structure of the financial system. The empirical findings of this paper provide practical policy implications for China to strike a balance between real estate development and an innovation-driven development strategy.
